129,502 results on '"GLOBAL temperature changes"'
Search Results
2. Recent Methods for Evaluating Crop Water Stress Using AI Techniques: A Review.
- Author
-
Cho, Soo Been, Soleh, Hidayat Mohamad, Choi, Ji Won, Hwang, Woon-Ha, Lee, Hoonsoo, Cho, Young-Son, Cho, Byoung-Kwan, Kim, Moon S., Baek, Insuck, and Kim, Geonwoo
- Subjects
- *
MACHINE learning , *PRECIPITATION variability , *GLOBAL temperature changes , *SUSTAINABILITY , *ARTIFICIAL intelligence , *DEEP learning - Abstract
This study systematically reviews the integration of artificial intelligence (AI) and remote sensing technologies to address the issue of crop water stress caused by rising global temperatures and climate change; in particular, it evaluates the effectiveness of various non-destructive remote sensing platforms (RGB, thermal imaging, and hyperspectral imaging) and AI techniques (machine learning, deep learning, ensemble methods, GAN, and XAI) in monitoring and predicting crop water stress. The analysis focuses on variability in precipitation due to climate change and explores how these technologies can be strategically combined under data-limited conditions to enhance agricultural productivity. Furthermore, this study is expected to contribute to improving sustainable agricultural practices and mitigating the negative impacts of climate change on crop yield and quality. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
3. Advancing chronologies for Last Interglacial sequences.
- Author
-
MCGUIRE, AMY M., WAAJEN, IRENE M., and BARLOW, NATASHA L.M.
- Subjects
GLOBAL temperature changes ,ICE cores ,EARTH temperature ,PALYNOLOGY ,CLIMATE change - Abstract
Studies of the Last Interglacial (ca. 129 to 116 ka BP) provide an opportunity to study the impact of high‐latitude warm temperatures on the Earth system. To build an accurate spatio‐temporal picture of climate and environmental variability during the Last Interglacial, building robust chronologies, through which the patchwork of terrestrial, marine, and ice core archives can be correlated, is paramount. In this review, we briefly evaluate the most common approaches used to date climate and environmental archives from the Last Interglacial, as well as the chronostratigraphic tools available for direct correlation between sequences, with a focus on terrestrial archives. We then present a case study on the use of pollen biostratigraphy for correlating sequences in NW Europe, highlighting its strength as a local correlation tool, and the challenges this approach presents in comparing sequences to global records of climate and environmental change. A move towards consistently dated sequences will improve our understanding of environmental responses to Last Interglacial climate variability across different elements of the global climate system and the rates at which different elements of the climate system respond to changes in global temperatures. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
4. Surviving global change: a review of the impacts of drought and dewatering on freshwater mussels.
- Author
-
Cushway, Kiara C., Geist, Juergen, and Schwalb, Astrid N.
- Subjects
- *
PHYSIOLOGICAL effects of temperature , *FRESHWATER mussels , *GLOBAL temperature changes , *FRESHWATER biodiversity , *HEAT waves (Meteorology) - Abstract
ABSTRACT The increase in the frequency and intensity of droughts and heatwaves caused by climate change poses a major threat to biodiversity. In aquatic systems, sedentary species such as freshwater mussels are generally considered more vulnerable to changes in habitat conditions than mobile species such as fish. As mussels provide important ecosystem services, understanding the impacts of drought on freshwater mussels is of particular importance for the management of overall functioning of aquatic ecosystems. We used a comprehensive literature search to provide a systematic overview of direct and indirect effects of drought on freshwater mussels (Bivalvia: Unionida) and an evaluation of mitigation strategies. We found that drought studies were concentrated mostly in the USA, with a focus on the Unionidae family. Topics ranged from the physiological effects of high temperatures, emersion, and hypoxia/anoxia to behavioural and reproductive consequences of drought and the implications for biotic interactions and ecosystem services. Studies spanned all levels of biological organization, from individual responses to population‐ and community‐level impacts and ecosystem‐wide effects. We identified several knowledge gaps, including a paucity of trait‐based evaluation of drought consequences, limited understanding of thermal and desiccation tolerance at the species level, and the synergistic effects of multiple drought stressors on mussels. Although we found many studies provided suggestions concerning management of populations, habitat conditions, and anthropogenic water use, a systematic approach and testing of recommended mitigation strategies is largely lacking, creating challenges for managers aiming to conserve freshwater mussel communities and populations in light of climate change. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
5. Using Historical Habitat Shifts Driven by Climate Change and Present Genetic Diversity Patterns to Predict Evolvable Potentials of Taxus wallichiana Zucc. in Future.
- Author
-
Li, Fuli, Wang, Chongyun, Peng, Mingchun, Meng, Wei, Peng, Lei, and Chen, Dengpeng
- Subjects
- *
BIOGEOGRAPHY , *GLOBAL temperature changes , *GENETIC variation , *GENETIC models ,POPULATION of China - Abstract
Climate change is altering the geographical distribution and abundance of species. Abundant genetic variation generally indicates a stronger adaptability and evolutionary potentiality, especially in case of sharply changing climates or environments. With the past global climate fluctuations, especially the climate oscillation since the Quaternary, the global temperature changes related to glaciation, many relict plant species have formed possible refugia in humid subtropical/warm temperate forests, thus retaining a high level of genetic diversity patterns. Based on the contraction and expansion of the geographical distribution of Taxus wallichiana Zucc. in the past driven by climate change, combined with the contemporary genetic diversity modeling, the distribution performance of Taxus wallichiana Zucc. in future climate change was predicted. The areas of highly suitable habitat will increase with climate change in the future. There were continuous and stable high suitable areas of T. wallichiana in the southeastern Tibet and northwestern Yunnan as long-term stable climate refugia. We made the genetic landscape surface of T. wallichiana complex and discovered geographical barriers against gene flow. Genetic barriers spatially isolated the center of genetic diversity into three regions: west (east Himalaya), middle (Yunnan plateau, Sichuan basin, Shennongjia, and the junction of Guizhou and Guangxi provinces), and east (Mt. Huangshan and Fujian). Southern Tibet was isolated from other populations. The central and western Yunnan, the Sichuan basin, and surrounding mountains were isolated from the southern China populations. We found that the positive correlationships between the present species genetic diversity and suitability index during LGM, MH, and 2070. This infers that T. wallichiana has provisioned certain genetic diversity and has strong evolutionary potential under conditions of climate change. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
6. Are biomass feedstocks sustainable? A systematic review of three key sustainability metrics.
- Author
-
Knight, David R., Goldsworthy, Michael, and Smith, Pete
- Subjects
- *
CARBON sequestration , *GLOBAL temperature changes , *SOIL composition , *WATER efficiency , *ALTERNATIVE fuels , *BIOMASS energy - Abstract
Biomass feedstocks are growing in importance due to their ability to serve as a renewable alternative to fossil fuels for large scale energy generation, with bioenergy projected to be a growing part of the UK's energy mix. Combined with technologies such as carbon capture and storage, sustainable bioenergy has the potential to produce negative emissions with including counterbalancing residual emissions. This paper presents a systematic review of the sustainability impacts of wood biomass (forestry/SRC) and Miscanthus, which are grown as energy fuels, comparing the three key indicators of sustainability: soil organic carbon sequestration rates, biodiversity, and water use efficiency (WUE). Analysis has shown significant influence from primary soil composition (p < 0.001) and previous land use (p < 0.001) on soil organic carbon sequestration rates following conversion to biomass feedstock production. Conversion from arable to forestry can have positive rates of sequestration of 1.4 ± 0.3 Mg C ha−1 year−1 on mineral soils, while similar conversions on a highly organic soils can lead to losses of −25 Mg C ha−1 year−1. This indicates a strong need for careful site selection for future forestry plantations. Miscanthus showed no preference under mineral or organic soils for carbon sequestration rate. Biodiversity at different trophic scales is impacted differently by biomass feedstock production. No significant impact on invertebrates was demonstrated between feedstocks but there is a significant difference between crops (p < 0.001) for vertebrates at higher trophic levels. A limited dataset was collected for WUE from the review, but analysis showed comparable WUE rates for Miscanthus and short rotation coppice, while forestry had significantly lower (p < 0.001) WUE. With global temperatures increasing and changes to climate, water stress is likely to increase. WUE will play an important role in the considerations dfor long term biomass feedstock planning and sourcing. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
7. Modeling Sea Level Rise Using Ensemble Techniques: Impacts on Coastal Adaptation, Freshwater Ecosystems, Agriculture and Infrastructure.
- Author
-
Dhal, Sambandh Bhusan, Singh, Rishabh, Pandey, Tushar, Dey, Sheelabhadra, Kalafatis, Stavros, and Kesireddy, Vivekvardhan
- Subjects
ABSOLUTE sea level change ,GREENHOUSE gases ,GLOBAL temperature changes ,DISSOLVED oxygen in water - Abstract
Sea level rise (SLR) is a crucial indicator of climate change, primarily driven by greenhouse gas emissions and the subsequent increase in global temperatures. The impact of SLR, however, varies regionally due to factors such as ocean bathymetry, resulting in distinct shifts across different areas compared to the global average. Understanding the complex factors influencing SLR across diverse spatial scales, along with the associated uncertainties, is essential. This study focuses on the East Coast of the United States and Gulf of Mexico, utilizing historical SLR data from 1993 to 2023. To forecast SLR trends from 2024 to 2103, a weighted ensemble model comprising SARIMAX, LSTM, and exponential smoothing models was employed. Additionally, using historical greenhouse gas data, an ensemble of LSTM models was used to predict real-time SLR values, achieving a testing loss of 0.005. Furthermore, conductance and dissolved oxygen (DO) values were assessed for the entire forecasting period, leveraging forecasted SLR trends to evaluate the impacts on marine life, agriculture, and infrastructure. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
8. Analysis of the Damage of Flexible Joint in Fuel Oil Pipelines Directed to Storage Tanks at PT X.
- Author
-
Setiyana, Budi, Rafli, M., and Muchammad
- Subjects
PETROLEUM as fuel ,GLOBAL temperature changes ,STORAGE tanks ,GAS industry ,PETROLEUM pipelines - Abstract
In piping systems, flexible joints can mean connections or elements designed to absorb movement or pressure that can occur in pipes, such as temperature changes or ground movements. This function can help prevent cracks or damage to the pipe system. The use of flexible joints in oil piping aims to maintain the integrity of the pipe system, prevent leaks, and reduce pressure that can damage pipes or other devices. This is critical especially in the oil and gas industry environment which has dynamic operational conditions. The purpose of this study was to find out how to maintain flexible joints and handle damage that occurs to flexible joints in storage tanks at PT X. The results of the study showed that damage of Flexible Joints occurred due to the installation of Motor Operated Valves (MOVs) that did not meet standards and Pressure Safety Valves (PSVs) was not calibrated everyday that experienced corrosion and broken springs due to lack of maintenance. Therefore, routine inspections were needed to prevent damage to the Pressure Safety Valve. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
9. Spatially Resolved Temperature Response Functions to CO2 Emissions.
- Author
-
Freese, Lyssa M., Giani, Paolo, Fiore, Arlene M., and Selin, Noelle E.
- Subjects
- *
GREEN'S functions , *GLOBAL temperature changes , *IMPULSE response , *DIFFERENTIAL operators , *CARBON emissions - Abstract
Carbon dioxide (CO2) emissions affect local temperature; quantifying that local response is important for learning about the earth system, the impacts of mitigation, and adaptation needs. We assume the climate system can be represented as a time‐dependent linear system, diagnosing Green's Functions for the spatial temperature response to CO2 emissions based on CMIP6 earth system models. This allows us to emulate the linear component of the temperature response to CO2. This approach is sufficient to capture the spatial temperature response of CMIP6 experiments within one standard deviation of the multimodel spread across most regions, though accuracy is lower in the Southern Ocean and the Arctic. Our approach reveals where nonlinear feedbacks are important in current CMIP6 models, and where the local system response is well represented by a time‐dependent linear differential operator. It incorporates emissions path dependency and may be useful for evaluating large ensembles of emission scenarios. Plain Language Summary: Carbon dioxide (CO2) emissions impact surface temperature. It is well established that the global mean temperature change is proportional to the cumulative emissions of CO2. This has led to the creation of carbon budgets to reach temperature goals. We test this relationship at the spatio‐temporal scale, quantifying a simple approach that estimates the local temperature response to CO2 emissions alone. We use an approach built from the Climate Model Intercomparison Project Phase 6 (CMIP6) Earth System Models, based on the concept that an additional unit of CO2 can be scaled for larger emissions and summed over time to estimate cumulative impacts. We evaluate this with additional CMIP6 experiments, showing that this approach captures the temperature response in most locations with lower accuracy in the Arctic and Southern Ocean. This type of approach may be useful to evaluate many policy scenarios and to better understand earth system processes that are represented in the models, as it takes around one second to quantify 90 years' worth of temperature change on a local computer, while Earth System Models can require weeks of runtime on supercomputers. Key Points: With a Green's Function approach, we emulate the linear component of the spatially resolved temperature response to CO2 emissionsWe reproduce the temperature response well within multi‐model uncertainty except in the Arctic and Southern OceanThis approach allows expedient quantification of the spatial and temporal temperature response to varying CO2 emissions pathways [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
10. Eocene monsoon climate expansion in East Asia: Evidence from orbital‐cycle driven terrestrial successions in the Jianghan Basin, Central China.
- Author
-
Cai, Yuan and Kong, Xiangxin
- Subjects
- *
MILANKOVITCH cycles , *GLOBAL temperature changes , *RED beds , *CYCLOSTRATIGRAPHY , *MONSOONS , *EOCENE Epoch , *WATERSHEDS , *CLIMATE change - Abstract
East Asia experienced complex climatic changes during the Eocene. Due to the lack of a high‐precision time framework covering the Eocene, the characteristics of sedimentary and climate evolution in this period remain unclear. The Jianghan Basin (Central China) developed an Eocene continental succession, which is composed of lower red beds and upper salt‐lake deposits exhibiting clear sedimentary rhythms, making these strata an ideal target for astronomical cycle analysis. Based on the established floating astronomical timescale, the lower red beds in the basin formed during the early–middle Eocene and were dominated by eccentricity cycles. The upper salt‐lake deposits formed during the middle–late Eocene and recorded obliquity cycles. The change in facies indicates that the climate transitioned from continuously arid to less arid with periodic relative wetness, which was forced by orbital cycles. Significant obliquity signals recorded by salt rhythmites responded to Eocene global temperature changes and Tibetan region uplift, which can be important markers of a monsoon‐like climate. Comparing the sedimentary and climatic characteristics of other Eocene lake basins in East Asia, the extension of the Eocene East Asian monsoon may have initiated during ca 43.6 to 40.0 Ma. This study provides a new perspective for understanding the early evolution of the East Asian monsoon. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
11. Maximum Power Point Tracking Controller for Photovoltaic Systems Based on the Weighted Mean of Vectors Algorithm Optimization Algorithm under Partial Shading Conditions and Temperature Changes.
- Author
-
Abdolhosseini, Morteza and Abdollahi, Rohollah
- Subjects
PHOTOVOLTAIC power systems ,MAXIMUM power point trackers ,GLOBAL temperature changes ,PARTICLE swarm optimization ,ROBUST control - Abstract
Under partial shading conditions (PSCs), photovoltaic (PV) systems exhibit non-uniform P-V characteristic curves with multiple local maximum power points (LMPP). Consequently, conventional maximum power point tracking (MPPT) algorithms often fail to accurately track the global maximum power point (GMPP), becoming trapped at local maxima and resulting in power loss. This paper introduces a novel MPPT controller based on the weighted mean of vectors (INFO) optimization algorithm to address these challenges. The INFO algorithm integrates three key operators: updated law, vector combination, and local search, offering advantages such as rapid convergence, high efficiency, and optimized power extraction under both PSCs and temperature changes (TCs). To validate the effectiveness of the INFO algorithm under PSCs and TCs, a partial shading platform featuring three PV modules with identical characteristics but varying radiation levels is utilized. Simulation studies compare the INFO algorithm against traditional perturb and observe (P&O), particle swarm optimization (PSO), and overall distribution particle swarm optimization (OD-PSO) algorithms in terms of MPPT performance. Results demonstrate that the INFO algorithm achieves a 60% reduction in tracking time and a 0.02% increase in MPPT controller efficiency compared to these methods. Overall, the proposed INFO algorithm achieves a balanced approach between exploration and exploitation stages, enhancing robustness, efficiency, and reducing tracking time in MPPT applications. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
12. Chris Burkard: The adventure photographer has a new book out called The Oceans. Niall Hampton discovers the stories behind the images and the author's relationship with the sea
- Author
-
Hampton, Niall
- Subjects
Global temperature changes ,Books - Abstract
With an appetite for adventure, a can-do attitude and a 'have camera, will travel' philosophy, Chris Burkard is as much a force of nature as the subjects he documents. One [...]
- Published
- 2024
13. Facing the Challenges of Climate Change - Latin American Perspectives
- Author
-
Machado-Borges, Thaïs, Sribman Mittelman, Ariel, and Wink, Georg
- Published
- 2024
- Full Text
- View/download PDF
14. Politicization, Ratification of International Agreements, and Domestic Political Competition in Non-Democracies: The Case of Iran and the Paris Climate Accords
- Author
-
Bayer, Resat and Tafazzoli, Bijan
- Subjects
Global temperature changes ,Environmental policy ,Actors ,Democracy ,Actresses ,International relations ,Political science - Abstract
While some degree of competition is present in many authoritarian regimes, the implications of such controlled competition on international issues have not received much consideration, including towards international environmental accords. We attempt to rectify this through a framework where we focus on internal political competition in a hybrid, nondemocratic system where national elections are held regularly. Specifically, we argue that the presence of multiple actors competing in elections in nondemocratic settings results in them assuming positions on various issues, justifying their positions, and attempting to mobilize their supporters with considerable implications for international environmental policies. We display our argument in the context of Iranian debates on the ratification of the Paris Climate Accords. Our findings demonstrate that the competing Iranian sides rely on different justifications for their environmental positions, resulting in extensive (negative) competitions of rhetoric where the international dimension emerges as an important feature in the internal competition. Overall, we show that political competition within non-democracies is likely to add to the complexity of international (environmental) negotiations and cooperation. Keywords: internatonal negotatons on climate change; competng narratves and electons in authoritarian regimes; politcal factons; environment and sanctons; regime survival, Introduction The Paris Climate Change Agreement, a legally binding international treaty that sets goals for temperature increases, was adopted by 196 parties at the United Nations (UN) Climate Change Conference [...]
- Published
- 2024
- Full Text
- View/download PDF
15. 2024 AMS AWARD and HONORS RECIPIENTS
- Subjects
Aquatic resources ,Water -- Management ,Global temperature changes ,Ocean circulation ,Business ,Earth sciences - Abstract
Honorary Member Mary Glackin Honorary Member John Toohey-Morales Honorary Member Andrea Celeste Saulo The Carl-Gustaf Rossby Research Medal Benjamin Santer For outstanding contributions to comprehending how climate change affects atmospheric [...]
- Published
- 2024
16. Effectiveness of greenhouse gas mitigation intervention for health-care systems: a systematic review/Efficacite des interventions visant a reduire les emissions de gaz a effet de serre dans les systemes de soins de sante: revue systematique/Eficacia de la intervencion para mitigar los gases de efecto invernadero en los sistemas sanitarios: una revision sistematica
- Author
-
Blom, Iris Martine, Eissa, Mohamed, Mattijsen, Juliette Claudine, Sana, Hamaiyal, Haines, Andy, and Whitmee, Sarah
- Subjects
Medical care, Cost of ,Greenhouse gases ,Global temperature changes ,Air quality management ,Public health ,Air pollution ,Evidence-based medicine ,Health - Abstract
Objective To identify evidence-based interventions that reduce greenhouse gas emissions in health-care systems in low-and middleincome countries and explore potential synergies from these interventions that aid climate change adaptation while mitigating emissions. Methods We systematically searched 11 electronic databases for articles published between 1990 and March 2023. We assessed risk of bias in each article and graded the quality of evidence across interventions in health-care operations, energy and supply chains. Findings After screening 25 570 unique records, we included 22 studies published between 2000 and 2022 from 11 countries across six World Health Organization regions. Identified articles reported on interventions spanning six different sources of emissions, namely energy, waste, heating and cooling, operations and logistics, building design and anaesthetic gases; all of which demonstrated potential for significant greenhouse gas emission reductions, cost savings and positive health impacts. The overall quality of evidence is low because of wide variation in greenhouse gas emissions measuring and reporting. Conclusion There are opportunities to reduce the greenhouse gas emissions from health-care systems in low- and middle- income countries, but gaps in evidence were identified across sources of emissions, such as the supply chain, as well as a lack of consideration of interactions with adaptation goals. As efforts to mitigate greenhouse gas intensify, rigorous monitoring, evaluation and reporting of these efforts are needed. Such actions will contribute to a strong evidence base that can inform policy-makers across contexts. Objectif Identifier les interventions fondees sur des donnees factuelles qui visent a reduire les gaz a effet de serre emanant des systemes de soins de sante dans les pays a revenu faible et intermediaire, mais aussi explorer d'eventuel les synergies liees a ces interventions et susceptibles de contribuer a une meilleure adaptation au changement climatique tout en reduisant les emissions. Methodes Nous avons procede a une analyse systematique de 11 bases de donnees electroniques, a la recherche d'articles publies entre 1990 et mars 2023. Pour chaque article, nous avons determine le risque de biais et evalue la qualite des donnees relatives aux interventions dans les unites de soins de sante, l'energie et les cha nes d'approvisionnement. Resultats Apres avoir examine 25 570 documents uniques, nous avons conserve 22 etudes publiees entre 2000 et 2022, issues de 11 pays appartenant a six regions de l'Organisation mondiale de la Sante. Les articles retenus mentionnaient des interventions couvrant six sources d'emissions differentes, a savoir l'energie, les dechets, le chauffage et la climatisation, les operations et services logistiques, la conception des b timents, ainsi que les gaz anesthesiques; toutes ont revele un potentiel en matiere de reduction des emissions de gaz a effet de serre, de realisation d'economies et d'impact positif sur la sante. Globalement, les donnees sont de pietre qualite en raison des variations des mesures et rapports concernant les emissions de gaz a effet de serre. Conclusion Il existe plusieurs moyens de reduire les emissions de gaz a effet de serre provenant des systemes de soins de sante dans les pays a revenu faible et intermediaire. Cependant, les preuves sur les sources d'emissions manquent, notamment au niveau de la cha ne d'approvisionnement, et les interactions a des fins d'adaptation ne sont que rarement prises en compte. Alors que les efforts visant a reduire ces emissions se multiplient, il est imperatif de les surveiller, de les evaluer et d'etablir des rapports rigoureux. De telles actions contribueront a mieux etayer les donnees afin d'orienter les responsables politiques en fonction du contexte. Objetivo Identificar intervenciones basadas en evidencias que reduzcan las emisiones de gases de efecto invernadero en los sistemas sanitarios de los paises de ingresos bajos y medios y explorar las posibles sinergias de estas intervenciones que ayuden a adaptarse al cambio climatico mientras se mitigan las emisiones. Metodos Se realizaron busquedas sistematicas en 11 bases de datos electronicas de articulos publicados entre 1990 y marzo de 2023. Se evaluo el riesgo de sesgo en cada articulo y se clasifico la calidad de las pruebas en las intervenciones relacionadas con las operaciones sanitarias, la energia y las cadenas de suministro. Resultados Tras examinar 25 570 registros unicos, se incluyeron 22 estudios publicados entre 2000 y 2022 de 11 paises de seis regiones de la Organizacion Mundial de la Salud. Los articulos identificados informaron sobre intervenciones que abarcaban seis fuentes diferentes de emisiones: energia, residuos, calefaccion y refrigeracion, operaciones y logistica, diseno de edificios y gases anestesicos; todos ellos demostraron potencial para reducciones significativas de las emisiones de gases de efecto invernadero, ahorro de costes e impactos positivos en la salud. La calidad general de las evidencias es baja debido a la gran variacion en la medicion y la notificacion de las emisiones de gases de efecto invernadero. Conclusion Existen oportunidades para reducir las emisiones de gases de efecto invernadero de los sistemas de atencion sanitaria en los paises de ingresos bajos y medios, pero se han detectado deficiencias en las evidencias de las diferentes fuentes de emisiones, como la cadena de suministro, asi como una falta de consideracion de las interacciones con los objetivos de adaptacion. A medida que se intensifican los esfuerzos para mitigar los gases de efecto invernadero, es necesario realizar un seguimiento, una evaluacion y una notificacion rigurosos de estos esfuerzos. Estas medidas contribuiran a crear una base de evidencias solida que pueda informar a los responsables de formular las politicas en todos los contextos., Introduction In the absence of actions to rapidly reduce global greenhouse gas emissions, climate change is predicted to be the biggest threat to human health in the 21st century. Direct [...]
- Published
- 2024
- Full Text
- View/download PDF
17. 36th meeting of the International Task Force for Disease Eradication, 5-6 October 2023/36e reunion du Groupe special international pour l'eradication des maladies, 5-6 octobre 2023
- Subjects
Task forces ,Global temperature changes ,Government ,Health ,World Health Organization ,Carter Center - Abstract
The 36th meeting of the International Task Force for Disease Eradication (ITFDE) (1) was convened in a hybrid (virtual and in-person) format at the Carter Center in Atlanta (GA), USA, [...]
- Published
- 2024
18. Spatially Heterogeneous Responses of Planktonic Foraminiferal Assemblages Over 700,000 Years of Climate Change.
- Author
-
Mathes, Gregor H., Reddin, Carl J., Kiessling, Wolfgang, Antell, Gawain S., Saupe, Erin E., and Steinbauer, Manuel J.
- Subjects
- *
GLOBAL temperature changes , *GENERAL circulation model , *GLOBAL warming , *CLIMATE change , *PALEOBIOLOGY - Abstract
Aim: To determine the degree to which assemblages of planktonic foraminifera track thermal conditions. Location: The world's oceans. Time Period: The last 700,000 years of glacial–interglacial cycles. Major Taxa Studied: Planktonic foraminifera. Methods: We investigate assemblage dynamics in planktonic foraminifera in response to temperature changes using a global dataset of Quaternary planktonic foraminifera, together with a coupled Atmosphere–Ocean General Circulation Model (AOGCM) at 8000‐year resolution. We use 'thermal deviance' to assess assemblage responses to climate change, defined as the difference between the temperature at a given location and the bio‐indicated temperature (i.e., the abundance‐weighted average of estimated temperature optima for the species present). Results: Assemblages generally tracked annual mean temperature changes through compositional turnover, but thermal deviances are evident under certain conditions. The coldest‐adapted species persisted in polar regions during warming but were not joined by additional immigrants, resulting in minimal assemblage turnover. The warmest‐adapted species persisted in equatorial regions during cooling with similarly minimal assemblage change. Assemblages at mid‐latitudes mostly tracked temperature cooling and warming. Main Conclusions: Planktonic foraminiferal assemblages were generally able to track or endure temperature changes: as climate warmed or cooled, bio‐indicated temperature also became warmer or cooler, although to a variable degree. At polar sites under warming and at equatorial sites under cooling, the change in bio‐indicated temperature was less than, or even opposite to, what would be expected from estimated environmental change. Nevertheless, all studied species persisted across the study interval, regardless of thermal deviance—a result that highlights the resilience and inertia of planktonic foraminifera on an assemblage level to the last 700,000 years of climate change. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
19. A key hub for climate systems: deciphering from Southern Ocean sea surface temperature variability.
- Author
-
Ninghong Li, Xufeng Zheng, Ting Su, Xiao Ma, Junying Zhu, and Dongdong Cheng
- Subjects
GLOBAL temperature changes ,ATLANTIC multidecadal oscillation ,EL Nino ,OCEAN ,GLOBAL warming - Abstract
The Southern Ocean connects the Pacific, Atlantic, and Indian Oceans, serving as a key hub for the global overturning circulation. The climate of the Southern Ocean is closely linked to the low-latitude equatorial Pacific, as well as the highlatitude regions of the North Atlantic, making it an important component of the global climate system. Due to the interactions of various processes such as atmospheric, oceanic, and ice cover, the Southern Ocean exhibits a complex and variable sea surface temperature structure. Satellite observations indicate that since 1980, the sea surface temperature of the Southern Ocean has been cooling, contrary to the global warming trend. However, due to the relatively short length of satellite observations, the specific mechanisms are not yet clear. Here, we used the EOF method to analyze sea surface temperature data since 1870 (HadISST1 and ERSSTV5), with three main separated modes explaining over 70% of the sea temperature variability. Among them, the first mode shows widespread positive sea surface temperature anomalies in the Southern Ocean, with a time series change consistent with global temperature anomalies, representing a mode of global warming. The second mode corresponds to the Atlantic Multidecadal Oscillation (AMO) but with a lag of approximately 4 years. The third mode is consistent with the variability of the El Niño-Southern Oscillation (ENSO). Furthermore, our study indicates that despite the ongoing global warming since 1980, the negative phase of AMO and positive phase of ENSO may counteract the effects of global warming, leading to an overall cooling trend in the sea surface temperature of the Southern Ocean. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
20. Heat stress responses and mitigation strategies in wheat: an updated and comprehensive review.
- Author
-
UL ABIDIN, Zain, MAHMOOD, Athar, ALAWADI, Hussam F. N., ULLAH, Muhammad S., SHAHID, Adeel, KHAN, Bilal A., AL-KHAYRI, Jameel M., ALDAEJ, Mohammed I., AL-DOSSARY, Othman, ALSUBAIE, Bader, SHEHATA, Wael F., and REZK, Adel Abdel-Sabour
- Subjects
- *
GLOBAL temperature changes , *LOCUS (Genetics) , *CROPS , *REACTIVE oxygen species , *CROP yields - Abstract
The main consequence of climate change on temperature is global warming. Over the past century, worldwide temperature has increased, rising by about 0.14 degrees Fahrenheit every year. Rising temperature negatively affects morphology, physiology, and yield of crops. Over the last 5 years, agriculture production in Pakistan affected due to temperature increase. Pakistan is an agriculture based developing country. About 2.2% GDP of Pakistan depends on wheat crop which is 1st major cereal crop and ranked as staple food. Nutritionally it provides proteins, dietary fibers, carbohydrates, calcium, and other important compounds but because of the harmful effects of a high temperature, yield of wheat crop in Pakistan has reduced to lowest levels in the last few years. Heat stress affects wheat plants by reducing growth, raised reactive oxygen species (ROS) production, denature cell membranes, and enzymes activity, decreasing photosynthetic activity and disturbing respiration processes. Improving wheat crop productivity is urgently needed to feed the rapidly growing population. Several techniques like Quantitative Trait Locus mapping, omics techniques, and application of nutrients have been used in the past to mitigate high temperature effect on wheat and other different crop plants. This review critically analyzes the response of wheat towards heat stress and its impacts on wheat crop as well as provides critical information on advanced strategies and techniques for the mitigation of heat stress. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
21. Substantial contribution of inorganic carbon sources to CO2 emissions in calcareous vineyard soils in Germany.
- Author
-
Islam, Muhammad, Wehrle, Ralf, Pätzold, Stefan, and Brüggemann, Nicolas
- Subjects
- *
CALCAREOUS soils , *GLOBAL temperature changes , *SOIL amendments , *SOIL respiration , *CARBON emissions - Abstract
In light of climate change and increasing global temperatures, it is important to equally prioritize the study of inorganic carbon dynamics in calcareous soils within temperate ecosystems, as has been done for arid or semiarid environments. A significant area of vineyards in Germany is established on calcareous soils. However, the potential influence of inorganic carbon on CO2 emissions in these vineyards has not been sufficiently explored when evaluating the carbon footprint of management practices in relation to carbon storage. Therefore, we aimed to differentiate between organic and inorganic sources of CO2 emissions from six vineyard soils located in the southwest of Germany that had previously received organic soil amendments (OA). Inorganic carbon content varied between 8 and 55 g kg−1 across different sites, with variations observed in the inorganic‐to‐organic carbon ratio. Soil samples were incubated under standard laboratory conditions for 48 h, and the source of emitted CO2 was determined using a two‐end‐member mixing model. The contribution of inorganic carbon to CO2 emissions was influenced by the quantity of inorganic carbon, with an increase in contribution with increasing inorganic‐to‐organic carbon ratio. On average, abiotic sources accounted for 5% to 40% of the emitted CO2 at the different sites, with one site showing no significant contribution of inorganic carbon. CO2 production from inorganic carbon was higher in the subsoil compared with the topsoil, likely related to the higher content of inorganic carbon in the subsoil. Notably, there was no discernible influence of OA on carbonate dissolution. This study emphasizes the significance of considering abiotic sources of CO2 emissions in addition to soil respiration in calcareous soils and highlights the need for further investigation to apply these findings at the field scale. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
22. HEAT TRANSFER MODELLING IN AN ANNULAR DISC UNDER HEATING AND COOLING PROCESSES WITH STRESS ANALYSIS.
- Author
-
Varhadpande, Indrajeet, Murthy, V. R. K., and Lamba, Navneet Kumar
- Subjects
HEATING ,GLOBAL temperature changes ,DISPLACEMENT (Psychology) ,MATERIALS ,HEAT transfer - Abstract
The goal of this effort is to determine the interaction among the heating and cooling processes in order to understand how solids behave when subjected to temperature changes. In this instance, the temperature, displacement, and stress relations are determined analytically and numerically while a thin annular disc is subjected to both the heating and cooling processes. The ability of a material to withstand stress is essential for the design of diverse mechanical structures that aim to enhance performance, durability, characteristics, and strength. This ability is demonstrated in many physical processes where the material structure crosses over into heating and cooling processes. Furthermore, memory derivatives used in the modelling of heat transfer equations more accurately depict the memory behaviour of an imagined disc and explain its physical significance. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
23. Visible-Light Spectroscopy and Rock Magnetic Analyses of Iron Oxides in Mixed-Mineral Assemblages.
- Author
-
Lepre, Christopher J., Yazzie, Owen M., and Klaus, Benjamin R.
- Subjects
FERRIC oxide ,IRON oxides ,GLOBAL temperature changes ,MARTIAN exploration ,REMANENCE ,GOETHITE ,HEMATITE - Abstract
Iron oxide assemblages are central to many pursuits, ranging from Mars exploration to environmental remediation. Oxides and oxyhydroxides of iron both carry the special properties of color and magnetism. In this paper, we use visible-light spectroscopy and rock magnetic data collected at varying temperatures (~77–973 K) to analyze the concentrations and identities of iron oxides found in natural hematite-dominated samples that were obtained from a scientific drill core of Late Triassic red beds in the American Southwest. Our results suggest that hematite colorization of Earth materials varies from red to blue/purple as crystal size increases. Second-derivative analysis of the collected visible-light spectra allows this variation to be measured through the characteristic wavelength band position. Magnetic coercivity data indicate "hardness" differences that also may suggest smaller grain sizes are associated with redder colors. Yellowish maghemite and goethite have overlapping characteristic wavelength band positions that make it challenging to distinguish their contributions to mixed assemblages from visible-light data alone. Remanent magnetizations acquired at ~77 K and room temperature suggest the presence of hematite and a low-coercivity phase that may be maghemite and/or oxidized magnetite. However, we interpret this phase as maghemite in order to explain the changes in iron oxide concentrations indicated by visible-light intensities near ~425 nm and because the thermal demagnetization data suggest that goethite is absent from the samples. Future research that increases the resolution of hematite, maghemite, and goethite detection in experimental and natural samples will provide opportunities to refine the study of past climates and constrain soil iron availability under future changes in global moisture and temperature. Multimethod datasets improve understanding of environmental conditions that cause iron oxides assemblages to shift in phase dominance, grain size, and crystallinity. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
24. Cloud Responses to Abrupt Solar and CO2 Forcing: 1. Temperature Mediated Cloud Feedbacks.
- Author
-
Aerenson, T. and Marchand, R.
- Subjects
GLOBAL temperature changes ,STRATOCUMULUS clouds ,GLOBAL warming ,ATMOSPHERIC carbon dioxide ,GLOBAL cooling ,WALKER circulation - Abstract
There are many uncertainties in future climate, including how the Earth may react to different types of radiative forcing, such as CO2, aerosols, and even geoengineered changes in the amount of sunlight absorbed by Earth's surface. Here, we analyze model simulations where the climate system is subjected to an abrupt change of the solar constant by ±4%, and where the atmospheric CO2 concentration is abruptly changed to quadruple and half its preindustrial value. Using these experiments, we examine how clouds respond to changes in solar forcing, compared to CO2, and feedback on global surface temperature. The total cloud response can be decomposed into those responses driven by changes in global surface temperature, called the temperature mediated cloud feedbacks, and responses driven directly by the forcing that are independent of the global surface temperature. In this paper, we study the temperature mediated cloud changes to answer two primary questions: (a) How do temperature mediated cloud feedbacks differ in response to abrupt changes in CO2 and solar forcing? And (b) Are there symmetrical (equal and opposite) temperature mediated cloud feedbacks during global warming and global cooling? We find that temperature mediated cloud feedbacks are similar in response to increasing solar and increasing CO2 forcing, and we provide a short review of recent literature regarding the physical mechanisms responsible for these feedbacks. We also find that cloud responses to warming and cooling are not symmetric, due largely to non‐linearity introduced by phase changes in mid‐to‐high latitude low clouds and sea ice loss/formation. Plain Language Summary: As the global mean temperature changes, there are changes in cloud amount, location, and thickness, which can all impact the radiative balance of the Earth. Cloud changes driven directly by global temperature change are called temperature mediated cloud feedbacks. In this paper, we study the temperature mediated cloud feedbacks that occur in model simulations where the amount of sunlight incident upon the Earth is increased or decreased abruptly, and then held constant for 150 years. We compare the cloud changes in these experiments with experiments where the CO2 concentration is similarly increased or decreased abruptly and held constant for 150 years. In doing so we find that the temperature mediated cloud feedbacks following abrupt changes in solar radiation are characteristically similar to those occurring following CO2 increase. There are however substantial differences in the temperature mediated cloud feedbacks that occur while the climate is warming versus cooling. Key Points: The temperature mediated cloud changes and feedbacks incurred by changes in solar and CO2 forcing are similarOptical depth changes at high latitudes produce substantial differences in cloud feedbacks in cooling and warming experimentsLikewise, tropical circulations respond differently in models to cooling and warming, with a stronger change in the Walker circulation in warming experiments [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
25. Unveiling the underlying drivers of Phanerozoic marine diversification.
- Author
-
Wilson, Connor J., Reitan, Trond, and Liow, Lee Hsiang
- Subjects
- *
LINEAR differential equations , *STOCHASTIC differential equations , *GLOBAL temperature changes , *TIME series analysis , *PHANEROZOIC Eon - Abstract
In investigating global patterns of biodiversity through deep time, many large-scale drivers of diversification have been proposed, both biotic and abiotic. However, few robust conclusions about these hypothesized effectors or their roles have been drawn. Here, we use a linear stochastic differential equation (SDE) framework to test for the presence of underlying drivers of diversification patterns before examining specific hypothesized drivers. Using a global dataset of observations of skeletonized marine fossils, we infer origination, extinction and sampling rates (collectively called fossil time series) throughout the Phanerozoic using a capture–mark–recapture approach. Using linear SDEs, we then compare models including and excluding hidden (i.e. unmeasured) drivers of these fossil time series. We find evidence of large-scale underlying drivers of marine Phanerozoic diversification rates and present quantitative characterizations of these. We then test whether changing global temperature, sea-level, marine sediment area or continental fragmentation could act as drivers of the fossil time series. We show that it is unlikely any of these four abiotic factors are the hidden drivers we identified, though there is evidence for correlative links between sediment area and origination/extinction rates. Our characterization of the hidden drivers of Phanerozoic diversification and sampling will aid in the search for their ultimate identities. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
26. Climate Change Is Leading to a Convergence of Global Climate Distribution.
- Author
-
Li, Chuanhua, Liu, Cui, Tsunekawa, Atsushi, Liu, Yunfan, Yin, Peng, Ma, Shaoxiu, Zhou, Min, and Wu, Xiaodong
- Subjects
- *
GLOBAL temperature changes , *PRECIPITATION anomalies , *TEMPERATURE distribution , *GLOBAL warming , *GRID cells - Abstract
The impact of changes in global temperatures and precipitation on climate distribution remains unclear. Taking the annual global average temperatures and precipitation as the origin, this study determined the climate distribution with the distances of temperature and precipitation from their global averages as the X and Y axes. The results showed that during 1980–2019, the global temperature distribution converged toward the mean (convergence), while the precipitation distribution moved away from the mean (divergence). The combined effects of both led to a convergence in the global climate distribution. During 2025–2100, significant climate convergence is observed under two emission scenarios (SSP245 and SSP585). However, the climate convergence and the area of change in climate type remains insignificant only under SSP126, suggesting that the diversity of the global climate pattern can be maintained under a sustainable emission pathway (SSP126), whereas high emission pathways will lead to greater uniformity in global climate. Plain Language Summary: Global average temperatures and precipitation have increased significantly over recent decades. However, the distribution of affected areas remains unclear in comparison to the global mean. Taking annual temperature and precipitation averages as a reference point, this study measured temperature and precipitation anomalies from the global mean on the X and Y axes. The Euclidean distance of each grid cell represents its deviation (anomaly) from the global climate mean. These distances are termed the degree of deviation of temperature, precipitation, and climate from the global mean for each raster. The results reveal a discernible homogenization trend regarding the distribution of global climate. Among three distinct climate scenarios, climate diversity is effectively preserved under the low‐emission model (SSP126), whereas global climate distribution exhibits a substantial convergence toward the annual mean under the high‐emission models (SSP245 and SSP585). Key Points: Against the backdrop of global warming, the climate pattern is shifting toward convergenceTemperature is the primary driver behind climate convergence, while precipitation plays a central role in climate diversityLow‐level emissions are conducive to preserving the diversity of future global climate distribution [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
27. Virtual Sensor for On-Line Hardness Assessment in TIG Welding of Inconel 600 Alloy Thin Plates.
- Author
-
Górka, Jacek, Jamrozik, Wojciech, Wyględacz, Bernard, Kiel-Jamrozik, Marta, and Ferreira, Batalha Gilmar
- Subjects
- *
GAS tungsten arc welding , *ALLOY plating , *GLOBAL temperature changes , *HARDNESS , *MANUFACTURING processes , *INCONEL - Abstract
Maintaining high-quality welded connections is crucial in many industries. One of the challenges is assessing the mechanical properties of a joint during its production phase. Currently, in industrial practice, this occurs through NDT (non-destructive testing) conducted after the production process. This article proposes the use of a virtual sensor, which, based on temperature distributions observed on the joint surface during the welding process, allows for the determination of hardness distribution across the cross-section of a joint. Welding trials were conducted with temperature recording, hardness measurements were taken, and then, neural networks with different hyperparameters were tested and evaluated. As a basis for developing a virtual sensor, LSTM networks were utilized, which can be applied to time series prediction, as in the analyzed case of hardness value sequences across the cross-section of a welded joint. Through the analysis of the obtained results, it was determined that the developed virtual sensor can be applied to predict global temperature changes in the weld area, in terms of both its value and geometry changes, with the mean average error being less than 20 HV (mean for model ~35 HV). However, in its current form, predicting local hardness disturbances resulting from process instabilities and defects is not feasible. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
28. A multifaceted journey in coastal meteorological projections through multioutput regression: a two-layer stacking ensemble approach.
- Author
-
Mollick, Tajrian, Hashmi, Galib, and Sabuj, Saifur Rahman
- Subjects
- *
EXTREME weather , *WEATHER forecasting , *MACHINE learning , *GLOBAL temperature changes , *WEATHER , *NATURAL disasters - Abstract
Coastal regions have experienced economic losses from natural disasters due to rising global temperatures and climate change. Accurate and timely weather information may reduce people's sensitivity to the risks associated with climate change. In this context, the imperative for accurate weather forecasting is paramount as a proactive measure to mitigate the adverse consequences. Integrating weather forecasting into a user-friendly app or website can provide a vital communication channel, ensuring widespread awareness and preparedness by promptly disseminating information about imminent weather-related risks. The study aims to employ a two-layer stacking ensemble method customized for daily weather prediction, encompassing temperature, relative humidity, and sealevel pressure simultaneously through multioutput regression. The first layer of the model implemented a stacked feature scaling ensemble approach for the task of accurate prediction, whereas the second layer deployed a general stacking model. Sandwip, a southeasterly coastal zone in Bangladesh's Chittagong region, serves as the test site for weather parameters using daily data from 2007 to 2021 collected at the meteorological station. We conducted a comparative analysis of the proposed model and individual machine learning regressions as a potent tool to facilitate the enhancement of forecasting skills. Metrics such as coefficient of determination, mean absolute percentage error, mean squared error, and mean absolute error were used to assess the models. The result demonstrated that the proposed model demonstrated superior performance compared to other models in predicting each weather parameter. Precisely, the research obtained the most optimal R-squared values (0.945, 0.684, and 0.947) in predicting temperature, humidity, and sealevel pressure, respectively. A comprehensive analysis of extreme weather conditions was conducted based on forecasted weather variables, which is beneficial for the inhabitants of any coastal island in Bangladesh. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
29. North Atlantic Warming Hole Modulates Interhemispheric Asymmetry of Future Temperature and Precipitation.
- Author
-
Park, In‐Hong, Yeh, Sang‐Wook, Dewitte, Boris, Wang, Guojian, Kirtman, B. P., and An, Soon‐Il
- Subjects
GLOBAL temperature changes ,CLIMATE sensitivity - Abstract
The observed cooling in the subpolar North Atlantic, known as the warming hole, is receiving much attention because of its relationship with the climate sensitivity in the Earth System Models (ESMs). However, the impact of its future projection on the global climate remains unclear due to large uncertainties. Here, we show that the future warming hole changes will affect the interhemispheric asymmetry of temperature and precipitation by modulating the Northern Hemisphere (NH) warming. Models with a weaker warming hole in the future project stronger NH warming by injecting more non‐radiative fluxes to the atmosphere. This leads to an asymmetric warming contrast between the two hemispheres, resulting in a meridional shift of the Inter‐Tropical Convergence Zone and more precipitation increases in the NH. Our study implies that the future warming hole controls the interhemispheric heat exchanges and associated changes in the global temperature and precipitation, suggesting that its improved simulation is essential. Plain Language Summary: The simulation of future warming hole intensity remains a major uncertainty in the Earth system models (ESMs) and its climatic impact is unclear. Here, using the ESMs, we show that future changes in the warming hole cause the interhemispheric asymmetry of temperature and precipitation. The warming of the warming hole injects non‐radiative fluxes into the atmosphere, amplifying more warming in the Northern Hemisphere than the Southern Hemisphere. Concurrently, this creates an energy imbalance between two hemispheres that leads to a northward shift of the Inter‐Tropical Convergence Zone, resulting in the interhemispheric asymmetry of precipitation. Key Points: Future warming hole changes in Coupled Model Intercomparison Phase 6 models affect the interhemispheric asymmetry of temperatureGreater warming in the warming hole increases the non‐radiative fluxes in the Northern Hemisphere, leading to an increase in the interhemispheric asymmetryThe warming hole affects future global precipitation by modulating the location of the ITCZ [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
30. Global Ocean Cooling of 2.3°C During the Last Glacial Maximum.
- Author
-
Seltzer, A. M., Davidson, P. W., Shackleton, S. A., Nicholson, D. P., and Khatiwala, S.
- Subjects
- *
LAST Glacial Maximum , *GLOBAL temperature changes , *ICE cores , *OCEAN , *ENTHALPY , *OCEAN temperature - Abstract
Quantitative constraints on past mean ocean temperature (MOT) critically inform our historical understanding of Earth's energy balance. A recently developed MOT proxy based on paleoatmospheric Xe, Kr, and N2 ratios in ice core air bubbles is a promising tool rooted in the temperature dependences of gas solubilities. However, these inert gases are systematically undersaturated in the modern ocean interior, and it remains unclear how air‐sea disequilibrium may have changed in the past. Here, we carry out 30 tracer‐enabled model simulations under varying circulation, sea ice cover, and wind stress regimes to evaluate air‐sea disequilibrium in the Last Glacial Maximum (LGM) ocean. We find that undersaturation of all three gases was likely reduced, primarily due to strengthened high‐latitude winds, biasing reconstructed MOT by −0.38 ± 0.37°C (1σ). Accounting for air‐sea disequilibrium, paleoatmospheric inert gases indicate that LGM MOT was 2.27 ± 0.46°C (1σ) colder than the pre‐industrial era. Plain Language Summary: The ocean plays a central role in Earth's climate system as a major reservoir of heat. Understanding how ocean heat content (OHC) changed in the past is therefore key to unraveling the history of global climate. Xenon, krypton, and nitrogen trapped in ice core air bubbles offer a means of reconstructing past OHC, because changes in global ocean temperature affect the solubilities of these gases in seawater, leading to corresponding changes in their atmospheric abundances. For example, a colder ocean can hold more xenon, meaning less xenon resides in the atmosphere. However, these gases in the ocean today are slightly out of equilibrium with the atmosphere (i.e., they are undersaturated), and it remains unclear to what extent this disequilibrium could have changed in the past. We carried out global atmosphere‐ocean model simulations, finding that undersaturation was likely reduced in the Last Glacial Maximum (LGM), a colder era of global climate ∼20,000 years ago. Our analysis suggests that a small component of the additional xenon in the colder LGM ocean arose from this change in air‐sea disequilibrium. After accounting for this effect, ice core noble gas measurements suggest a slightly warmer LGM ocean than previously thought. Key Points: Global ocean air‐sea gas exchange simulations suggest reduced undersaturation of inert gases in the Last Glacial Maximum (LGM) oceanReduced LGM undersaturation indicates a small cold bias in mean ocean temperature (MOT) reconstruction from ice core noble gasesA revised estimate of MOT, accounting for air‐sea disequilibrium, is 2.27 ± 0.46°C colder than the pre‐industrial era [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
31. Eocene Tectonic Uplifts Caused the Early Oligocene Intrusion of the Indian Monsoon Into the Tuotuohe Basin and the Increased Evaporation, Central‐Northern Tibet: Insights From the Oxygen Isotope Record.
- Author
-
Li, Leyi and Chang, Hong
- Subjects
OXYGEN isotopes ,INTERTROPICAL convergence zone ,GLOBAL temperature changes ,OLIGOCENE Epoch ,EOCENE Epoch ,MONSOONS - Abstract
It is not clear how the Asian monsoon evolved after leaving the spatial range of the Intertropical Convergence Zone in the Late Eocene and before the modern‐like Asian monsoon formed at ∼26 Ma. In this study, the results of a well‐dated, robust, and continuous paleoenvironmental carbonate oxygen isotope record from the Tuotuohe section in the Tuotuohe Basin on the central–northern Tibetan Plateau indicate that the carbonate oxygen isotope showed positive bias at 30.5 Ma. Evidence concerning the temperature, precipitation, paleolatitude, paleoelevation, salt mines and global temperature changes at this time suggest that the positive oxygen isotope shift was mainly due to a combination of the intrusion of the Indian monsoon into the basin and increased evaporation, both of which were ultimately induced by the tectonic uplift of the Tuotuohe Basin before 30.5 Ma and the retreat of the Paratethys Sea after the Eocene. Key Points: Carbonate oxygen isotope in the Tuotuohe Basin has an evident positive shift at 30.5 MaThe Indian monsoon intruded into the Tuotuohe Basin at 30.5 MaThe intrusion of the Indian monsoon mainly induced by the tectonic uplifts of the Tuotuohe Basin before 30.5 Ma [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
32. BRAIN ON FIRE: Climate change is spurring an unreported crisis in neurological health
- Author
-
Aldern, Clayton Page
- Subjects
Brain ,Global temperature changes ,Geography - Abstract
In February, the Natural History Museum announced the winners of its annual Wildlife Photographer of the Year competition. The 2023 finalists had captured denizens of a natural world infrequently observed [...]
- Published
- 2024
33. Sonic odyssey: Its mood consistently dark and ominous, with songs about climate change, disinformation and the reigniting of the Cold War, Pallas s latest album, The Messenger, is certainly far from easy listening. Only their eighth album in their 48 years, it was also - as usual - far from being a rush job
- Author
-
Ling, Dave
- Subjects
Global temperature changes ,Disinformation ,Music - Abstract
There's sluggish, there's long-winded, there's slow, there's languid and unhurried. Then there's the speed at which Pallas seem to operate, which can best be described as glacial. Prog's correspondent has [...]
- Published
- 2024
34. THE ESA AT 50
- Subjects
United States. Fish and Wildlife Service -- International economic relations ,United States. Congress -- International economic relations ,Chevron U.S.A. Inc. -- International economic relations ,Extinction (Biology) ,Global temperature changes ,Endangered species ,Wildlife conservation ,Natural resources ,Environmental issues ,Law ,Endangered Species Act of 1973 - Abstract
SUMMARY December 2023 marked 50 years since the Endangered Species Act (ESA) was signed into law. The ESA has proven resilient to numerous legal challenges and saved many species from [...]
- Published
- 2024
35. Sustainability marketing beyond sustainable development: towards a degrowth agenda.
- Author
-
Lloveras, Javier, Marshall, Adam P., Vandeventer, James S., and Pansera, Mario
- Subjects
MARKETING ,SUSTAINABLE development ,GLOBAL temperature changes ,ECOLOGICAL economics ,POLITICAL ecology ,TRANSFORMATIVE learning - Abstract
Drawing on ecological economics, post-development studies, and political ecology, this paper argues that sustainable development notions have run their course within sustainability marketing debates and proposes degrowth as an alternative framework to steer disciplinary debates in new directions. We chart unexplored territory, offering sustainability marketing scholars tools to navigate degrowth-minded policies, transformative frameworks, and business models. In doing so, our work contributes to existing sustainability marketing debates in three ways: first, we respond to the paucity of studies engaging with the political economy of sustainability marketing. Second, we make visible the tensions and contradictions that arise as marketers seek to reconcile imperatives of economic growth and sustainability. Finally, we foreground degrowth as an emerging sustainability proposition, with potential for inspiring the radical set of transformations required to avert catastrophic climate change and keep global temperatures well below +2°C (relative to pre-industrial levels), as pledged in the Paris Agreement. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
36. El fenómeno ENSO y la precipitación de la Zona Protectora Monte Alto, Costa Rica /The ENSO phenomenon and the precipitation of the Monte Alto Protected Zone, Costa Rica
- Author
-
Vindas, GloriarÃa Guzman, GarcÃa, Miguel Méndez, and Alvarado, Carlos Rojas
- Published
- 2024
- Full Text
- View/download PDF
37. Agronomic performance of sunflower hybrids grown in the semi-arid climate of Romania
- Author
-
Constantinescu, Emilia, Bonea, Dorina, Dunareanu, Ioana-Claudia, Botu, Mihai, Saracin, Ion, Olaru, Liviu-Aurel, and Nastase, Sorina Nitu
- Published
- 2024
- Full Text
- View/download PDF
38. Environment and Energy Economics
- Author
-
Fowlie, Meredith and Knittel, Christopher R.
- Subjects
Energy economics ,Global temperature changes ,Energy policy ,Energy industry ,Natural resources ,Business, general ,Business ,Economics - Abstract
Launched in 2007, the NBER's Environment and Energy Economics (EEE) Program brings together scholars working on environmental, energy, and natural resource economics. The EEE Program now has 126 affiliated researchers, [...]
- Published
- 2023
39. Reaching New Heights: Superhuman Effort Establishes Summit Weather Observations on Mount Everest
- Subjects
Global temperature changes ,Precipitation (Meteorology) ,Business ,Earth sciences - Abstract
Himalayan weather has long been a mystery. The extreme logistical challenges that come with just trying to access the loftiest mountains have precluded all but a handful of weather stations [...]
- Published
- 2023
40. Exploring the Potential of the Google Earth Engine (GEE) Platform for Analysing Forest Disturbance Patterns with Big Data /Exploration del potential de la plataforma de Google Earth Engine (GEE) para el analisis de patrones de perturbation forestal a traves de macrodatos
- Author
-
Cinar, Tunahan and Aydin, Abdurrahim
- Published
- 2023
- Full Text
- View/download PDF
41. Meeting of the Strategic Advisory Group of Experts on Immunization, September 2023: conclusions and recommendations/ Reunion du Groupe strategique consultatif d'experts sur la vaccination, septembre 2023: conclusions et recommandations
- Subjects
Vaccination ,Global temperature changes ,Government ,Health ,World Health Organization ,ACAM2000 (Vaccine) - Abstract
The Strategic Advisory Group of Experts (SAGE) on Immunization met on 25-29 September 2023. This report summarizes their discussions, conclusions, and recommendations. All SAGE recommendations are made using evidence-based methods, [...]
- Published
- 2023
42. FACTORS INFLUENCING THE ADOPTION OF CLIMATE SMART AGRICULTURE PRACTICES AMONG SMALLHOLDER FARMERS IN KAKAMEGA COUNTY, KENYA
- Author
-
Ndung'u, S., Ogema, V., Thiga, M., Wandahwa, P., and Ndung'u, Simon
- Subjects
United States. Department of Agriculture -- Officials and employees ,Agricultural industry -- Officials and employees ,Agriculture ,Agricultural conservation ,Global temperature changes ,Non-governmental organizations ,Food supply ,Farmers ,Security management ,Agricultural industry ,Food/cooking/nutrition ,Health - Abstract
Most of Kenya's population's livelihoods and agri-food systems rely on rain-fed agriculture making them vulnerable to climate change. The adverse effects of climate change on agricultural production have necessitated the promotion of Climate-Smart Agriculture (CSA) technologies. Climate-Smart Agriculture (CSA) technologies help guide actions needed to transform and reorient agricultural systems to effectively support development and ensure food security by increasing farmers' resilience to climate change. This study sought to ascertain the current state of CSA practices among Kakamega County's smallholder farmers to identify the main drivers of CSA adoption. Stratified sampling was used to select six sub-counties to represent the county's various agroecological zones and regions for the research sample. A combination of purposive and snowball sampling was used to select 428 smallholder CSA farmers of which 182 were adopters while 246 were dis-adopters. Primary data were collected using interview guides developed through the Kobo Collect Application. Microsoft Excel and Statistical Package for Social Sciences (SPSS) statistical packages were used to process and analyze the data. This study established that CSA technologies in Kakamega are mainly promoted by international development partners, non-governmental organizations and research organizations. In addition, the most adopted CSA technologies were agroforestry, composting, and soil and water conservation structures, while push-pull technology, conservation agriculture, and vermiculture were the least adopted. This study, further, established that smallholder farmers' level of education, membership to a farmers' group, interaction with extension officers and farming experience influenced adoption of CSA technologies. Other factors are those that increase household productive resources, such as land ownership, household income, and access to agricultural credit. The results of this study suggest that those who promote CSA technologies, policymakers, extension service providers, and other stakeholders should take smallholder farmers' socioeconomic and biophysical factors into account when doing so. Key words: Climate-smart agriculture, CSA practices, CSA adoption, CSA dis-adoption, smallholder farmers, INTRODUCTION Climate Smart Agriculture (CSA) has been described as a method of combining various sustainable methods to address a specific community's climate challenges [1]. While sustainable agriculture focuses on producing [...]
- Published
- 2023
43. Firming Technologies to Reach 100% Renewable Energy Production in Australia's National Electricity Market (NEM)
- Author
-
Gilmore, Joel, Nelson, Tim, and Nolan, Tahlia
- Subjects
Greenhouse gases ,Batteries ,Hydrogen ,Global temperature changes ,Air quality management ,Natural gas -- Storage ,Alternative energy sources ,Energy policy ,Air pollution ,Hydrogen as fuel ,Energy management systems ,Business ,Economics ,Petroleum, energy and mining industries - Abstract
Australia has committed to reducing its greenhouse gas emissions in a manner consistent with limiting anthropogenic climate change to no more than 2 degrees Celsius. One of the ways in which this commitment is being realised is through a shift towards variable renewable energy (VRE) within Australia's National Electricity Market (NEM). Substituting existing dispatchable thermal plant with VRE requires consideration of long-term energy resource adequacy given the unpredictability of solar and wind resources. While pumped hydro and battery storage are key technologies for addressing short-term mismatches between resource availability and demand, they may be unable to cost effectively address 'energy droughts'. In this article, we present a time sequential solver model of the NEM and an optimal firming technology plant mix to allow the system to be supplied by 100% VRE. Our conclusion is that some form of fuel-based technology (most likely hydrogen) will probably be required. This has important implications for Australian energy policy. Keywords: Energy storage, Electricity markets, Energy market modelling, 1. INTRODUCTION Australia has committed to reduce greenhouse gas emissions consistent with limiting anthropogenic climate change to no more than 1.5-2 degrees Celsius. These commitments imply a 50% and 75% [...]
- Published
- 2023
- Full Text
- View/download PDF
44. THE CANADIAN NET-ZERO EMISSIONS ACCOUNTABILITY ACT: A TEPID RESPONSE TO THE PARIS AGREEMENT
- Author
-
Campbell-Durufle, Christopher
- Subjects
Oxford University Press (Oxford, England) ,Cambridge University Press ,Sustainable development ,Greenhouse gases ,Environmental law, International ,Global temperature changes ,Air quality management ,Book publishing ,Air pollution ,Natural resources -- United Kingdom -- Japan -- Canada -- France ,Law ,Canada. Net-Zero Emissions Accountability Act 2020 ,United Nations. General Assembly ,European Union. European Parliament ,United Nations. Environment Programme ,Climate Action Network - Abstract
Dedication I would like to dedicate this article to the memory of Professor Meinhard Doelle, Dalhousie University, who tragically passed away in September 2022. Professor Doelle enriched my doctoral research through his insightful writing on international climate law, challenged me in a kind and constructive way as external examiner for my defense, and generously provided feedback on a draft of this article. His work will continue to inspire countless environmental law scholars in Canada and around the world., 'Canada's record on climate change should be judged not only on the targets and commitments that Canada has made over the years, but also on its actions. Despite commitments from [...]
- Published
- 2023
45. Questor Technology reports Q2 EPS (C$0.03) vs. (C$0.02) last year
- Subjects
Methane ,Global temperature changes ,Air quality management ,Air pollution ,Company earnings/profit ,Business ,News, opinion and commentary - Abstract
Reports Q2 revenue C$870,360 vs. C$2.2M last year. The company said, 'The global emission regulatory environment is rapidly evolving and continues to develop favorably for the Company's products, as regulators, [...]
- Published
- 2024
46. Global temperature is likely to exceed 1.5°C above pre-industrial level temporarily in next 5 years.
- Subjects
- *
GLOBAL temperature changes , *FORECASTING , *CLIMATE change , *INDUSTRIES - Abstract
The article presents the discussion on likelihood that the annual average global temperature will temporarily exceed 1.5°C above pre-industrial levels for at least one of the next five years. Topics include prediction that at least one of these years will be the warmest on record, the increased urgency for climate action; and a significant speech by United Nations Secretary-General António Guterres emphasizing the critical need for ambitious climate efforts.
- Published
- 2024
47. Part-Time Climate Scientist.
- Author
-
PERKOWITZ, SIDNEY
- Subjects
- *
SCIENCE education , *ATMOSPHERIC carbon dioxide , *EARTH temperature , *ATMOSPHERIC water vapor , *GLOBAL temperature changes , *GREENHOUSE effect - Abstract
In 1938, Guy Stewart Callendar, a steam engineer, presented a groundbreaking idea to the Royal Meteorological Society: human burning of fuel was causing global warming. Despite skepticism from the scientific community, Callendar persisted in his research, using data and physics to support his claims. His work, although largely ignored during his lifetime, has since been proven accurate and prescient. Callendar's findings laid the foundation for our understanding of human-induced climate change and continue to be referenced in modern climate models. [Extracted from the article]
- Published
- 2024
48. Globe trotters
- Author
-
Kellow, Aynsley
- Published
- 2021
49. Projected Global Temperature Changes After Net Zero Are Small But Significant.
- Author
-
Borowiak, Alex, King, Andrew D., Brown, Josephine R., Jones, Chris D., Ziehn, Tilo, Meinshausen, Malte, and Cassidy, Liam
- Subjects
- *
GLOBAL temperature changes , *GREENHOUSE gases , *CARBON emissions , *CLIMATE change , *GLOBAL warming - Abstract
As more countries make net zero greenhouse gas emissions pledges, it is crucial to understand the effects on global climate after achieving net zero emissions. The climate has been found to continue to evolve even after the abrupt cessation of CO2 emissions, with some models simulating a small warming and others simulating a small cooling. In this study, we analyze if the temperature and precipitation changes post abrupt cessation of CO2 emissions are significantly different compared to natural climate variations. We find that the temperature changes are outside of natural variability for most models, whilst the precipitation changes are mostly non‐significant. We also demonstrate that post‐net zero temperature changes have implications for the remaining carbon budget. The possibility of further global warming post‐net zero adds to the evidence supporting more rapid emissions reductions in the near‐term. Plain Language Summary: As more countries commit to achieving net‐zero greenhouse gas emissions, it is essential to understand the impact this will have on the global climate beyond this point. It has been found that even after CO2 emissions are abruptly halted, the climate continues to change, with various models predicting either a slight warming or cooling effect. In our study, we investigate whether the temperature and precipitation changes that occur after the sudden cessation of CO2 emissions are noteworthy when compared to natural climate variations. Our analysis reveals that the temperature changes, in the majority of models, surpass what can be attributed to natural variability. However, the precipitation changes are generally not significant. Additionally, we observe that the temperature changes post‐net zero have implications for the remaining carbon budget. Key Points: Global mean surface temperature changes after abrupt CO2 emissions cessation are significant compared to natural variability in most modelsGlobal mean precipitation changes after 50 yrs are only significant compared to natural variability in models that warmThe uncertain temperature changes post‐net zero have implications for the remaining carbon budget [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
50. Climate change impacts on agricultural trade and food security in emerging economies: case of Southern Africa.
- Author
-
Sabola, Gift Andrew
- Subjects
- *
CLIMATE change , *FOOD security , *AGRICULTURAL industries , *GLOBAL temperature changes - Abstract
Climate change has been a significant threat to sustainable agriculture impacting trade and food security. This research investigates the impacts of climate change on agricultural trade and food security in emerging economies focusing on Southern Africa. The research employed the dynamic panel Generalised Method of Moments (GMM) using panel data for the period 2012 to 2021 obtained from a sample of 12 Southern African countries selected based on data availability. The main independent variables to the research were climate change variables (temperature and precipitation). Other control variables included were population growth, food inflation and agricultural growth. The study found significant negative effects of climate change on agriculture trade. Whilst temperature changes were found to have insignificant effects, precipitation changes were found to have significant positive effects. The research recommends concerted efforts towards climate change adaptation and mitigation for sustainable agriculture. Based on the Findings, sustainable food security and agricultural trade Southern African emerging economies may be attained through effective climate change mitigation and adaptation approaches particularly promoting climate-smart agriculture (CSA). [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.