Search

Your search keyword '"Villalba, Gara"' showing total 265 results
Start Over Author "Villalba, Gara"
265 results on '"Villalba, Gara"'

8. Downscaling WRF-Chem: Analyzing Urban Air Quality in Barcelona City

Author

Vidal, Veronica, Cortés, Ana, Badia, Alba, Villalba, Gara, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Mikyška, Jiří, editor, de Mulatier, Clélia, editor, Paszynski, Maciej, editor, Krzhizhanovskaya, Valeria V., editor, Dongarra, Jack J., editor, and Sloot, Peter M.A., editor

Published
2023
Full Text
View/download PDF

18. Evaluating WRF-BEP/BEM Performance: On the Way to Analyze Urban Air Quality at High Resolution Using WRF-Chem+BEP/BEM

Author

Vidal, Veronica, Cortés, Ana, Badia, Alba, Villalba, Gara, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Paszynski, Maciej, editor, Kranzlmüller, Dieter, editor, Krzhizhanovskaya, Valeria V., editor, Dongarra, Jack J., editor, and Sloot, Peter M.A., editor

Published
2021
Full Text
View/download PDF

32. Closing the nutrient cycle in urban areas:The use of municipal solid waste in peri-urban and urban agriculture

Author

Arosemena, Juan David, Toboso-Chavero, Susana, Adhikari, Biraj, Villalba, Gara, Arosemena, Juan David, Toboso-Chavero, Susana, Adhikari, Biraj, and Villalba, Gara

Abstract

Cities face the challenges of supplying food and managing organic municipal solid waste (OMSW) sustainably amid increasing urbanization rates. Urban agriculture (UA) can help with this effort by producing local crops that are fertilized with nutrients recovered from compost generated from OMSW. This research aims to determine the potential of OMSW compost to supply the nitrogen-phosphorus-potassium (NPK) demand of UA and the environmental benefits of replacing mineral fertilizer from a life cycle perspective. The Metropolitan Area of Barcelona (AMB) serves as the case study given its commitment to reuse biowaste according to the Revised Waste Framework Directive and to promote UA as a signing member of the Milan Urban Food Policy Pact. Based on crop requirements and farmer surveys, we find that the annual NPK demands of the agricultural fields of the AMB that cover 5,500 ha and produce 70,000 tons of crops are approximately 769, 113, and 592 tons of NPK, respectively. Spatial material flow analysis and life cycle assessment were applied to found that the current waste management system can potentially substitute 8 % of the total NPK demanded by UA with compost, reduce the impacts by up to 39 % and yield savings in global warming of 130 %. The more ambitious future scenario of 2025 can potentially substitute 21 % of the total NPK demand and reduce environmental impacts up to 1,049 %, depending on the category considered. Avoiding processing of mixed OMSW, mineral fertilizer replacement and cogeneration of electricity from biogas are the major contributors to these environmental savings.

Published
2024

33. Predicting willingness to pay and implement different rooftop strategies to characterize social perception of climate change mitigation and adaptation

Author

Untereiner, Erin (author), Toboso Chavero, S.T.C.H. (author), Fariñas, Ana Vázquez (author), Madrid-Lopez, Cristina (author), Villalba, Gara (author), Durany, Xavier Gabarrell (author), Untereiner, Erin (author), Toboso Chavero, S.T.C.H. (author), Fariñas, Ana Vázquez (author), Madrid-Lopez, Cristina (author), Villalba, Gara (author), and Durany, Xavier Gabarrell (author)

Abstract

With the latest IPCC report, dramatic global climate action must be taken immediately to limit global warming to 1.5 °C, or face more frequent and extreme weather events with catastrophic implications. Cities must invest in climate resilience development; however, government policies are only effective if they are supported by the society in which they serve. As such, this study aims to characterize the social perception of climate resilience development, in particular the implementation of sustainable urban rooftop strategies, to support policy makers and enable individual action. This was accomplished through the analysis of 1,100 answered surveys in Cerdanyola del Vallès (Spain), to assess one’s willingness to pay (WTP) and willingness to implement (WTI) rooftop strategies according to: 1. socio-demographical characteristics; 2. social perceptions and beliefs; and 3. surrounding land use and land cover, and vulnerabilities identified through temperature and normalized difference vegetation index (NDVI) maps. The results of this study found age played a significant role in predictability, with 18-39-year-olds being the most willing to pay and implement the various rooftop scenarios. However, our results uncovered societal inequality as those 85+ were the second group most interested in rooftop agriculture but the most financially restricted. Belief in the viability of rooftop strategies increased respondents WTP and WTI while having access to ones’ rooftop increased willingness to partake in rooftop food cultivation and enhance rooftop greenery. A new finding presented by this study is the quantifiable impact that urban greenery plays on increasing survey respondents WTP and WTI., Integral Design & Management

Published
2024
Full Text
View/download PDF

40. Exploring the influence of land use on the urban carbonyl sulfide budget: a case study of the Metropolitan Area of Barcelona

Author

Estruch, Carme, primary, Belviso, Sauveur, additional, Badia, Alba, additional, Vidal, Veronica, additional, Curcoll, Roger, additional, Udina, Mireia, additional, Grossi, Claudia, additional, Morguí, Josep-Anton, additional, Segura, Ricard, additional, Ventura, Sergi, additional, Sola, Yolanda, additional, and Villalba, Gara, additional

Published
2023
Full Text
View/download PDF

41. Exploring the Influence of Land Use on the Urban Carbonyl Sulfide Budget: A Case Study of the Metropolitan Area of Barcelona.

Author

Estruch, Carme, Belviso, Sauveur, Badia, Alba, Vidal, Veronica, Curcoll, Roger, Udina, Mireia, Grossi, Claudia, Morguí, Josep‐Anton, Segura, Ricard, Ventura, Sergi, Sola, Yolanda, and Villalba, Gara

Subjects
URBAN land use, METROPOLITAN areas, ANTHROPOGENIC effects on nature, SEA breeze, AGRICULTURE, TROPOSPHERIC ozone, CARBONACEOUS aerosols
Abstract

Carbonyl sulfide (OCS) is used to quantify the carbon capture potential of the biosphere because of its direct correlation with CO2 uptake during photosynthesis. However, to constrain the urban biosphere signal, it is necessary to evaluate potential anthropogenic sources. We conducted two sampling campaigns in the Metropolitan Area of Barcelona (AMB), Spain, during May (full COVID lockdown) and October 2020 to measure the spatial distribution and variability of OCS in four urban land uses as follows: built, urban forest, urban park, and peri‐urban agriculture. The OCS background levels determined at Tibidabo (442 m asl) were approximately 484 ± 20 ppt and 407 ± 8 ppt for May and October 2020, respectively, and agreed with other seasonal surveys conducted in Europe during that same period. Averaged emissions were in the range of +Δ12 ± 40 ppt for the city and were +Δ9.4 ± 40.9 ppt for urban +Δ22.1 ± 48 ppt for urban green +Δ20.7 ± 42.9 ppt for agricultural and −Δ4.8 ± 19.6 ppt for forest. The urban values ranged from neutral to above background, suggesting nearby anthropogenic and marine emissions such as +Δ150 ppt in Montjuic, which is downwind of Barcelona's harbor. During the crop‐growing season in May, the agricultural areas consistently showed values below the background (up to −Δ76 ppt in Gavà, uptake) at 7:00 UTC when the land breezes were dominant, while later in the morning, when the sea breeze are developed, the plant sink is masked by the transport of marine emissions. Urban forests located north of Tibidabo showed OCS values up to −Δ70 ppt, suggesting significant uptake by urban forests. We conclude that determining the urban biosphere signal using OCS as a tracer is more complex than expected because the marine and anthropogenic emissions from the port strongly impact the spatial‐temporal distribution of OCS. Plain Language Summary: Carbonyl sulfide (OCS) is a gas used to quantify the carbon capture potential of the biosphere. However, cities have potential anthropogenic OCS sources that can impede a clear constraint of the urban biosphere signal. We conducted two sampling campaigns in the Metropolitan Area of Barcelona (AMB), Spain, during May (full COVID lockdown) and October 2020 to measure the variability of OCS in four urban land uses: built, urban forest, urban park, and peri‐urban agriculture. The OCS background levels determined at Tibidabo (were approximately 484 ± 20 ppt and 407 ± 8 ppt for May and October 2020, respectively). The urban built sites were typically above background, suggesting nearby anthropogenic and marine emissions. During the crop‐growing season, the agricultural areas consistently showed values below the background suggesting plant OCS uptake when the land breezes were dominant, while later in the morning, when the sea breezes developed, the influence of marine emission resulted in values above the background. Urban forests showed significant OCS uptake. We conclude that determining the urban biosphere signal using OCS as a tracer is more complex than expected because the marine and anthropogenic emissions from the port strongly impact the spatial‐temporal distribution of OCS. Key Points: The urban built sites were typically above background, suggesting nearby anthropogenic and marine emissionsAgricultural areas consistently showed values below the background suggesting plant Carbonyl sulfide (OCS) uptake when the land breezes were dominantDetermining urban biosphere signal using OCS is complex because marine and anthropogenic emissions impact its spatial‐temporal distribution [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results