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13 results on '"Quéré, C. Le"'

1. Global fossil carbon emissions rebound near pre-COVID-19 levels

Author

Jackson, RB, Friedlingstein, P, Quere, C Le, Abernethy, S, Andrew, RM, Canadell, JG, Ciais, P, Davis, SJ, Deng, Zhu, Liu, Zhu, and Peters, GP

Subjects
Physics - Atmospheric and Oceanic Physics
Abstract

Global fossil CO2 emissions in 2020 decreased 5.4%, from 36.7 Gt CO2 in 2019 to 34.8 Gt CO2 in 2020, an unprecedented decline of ~1.9 Gt CO2. We project that global fossil CO2 emissions in 2021 will rebound 4.9% (4.1% to 5.7%) compared to 2020 to 36.4 Gt CO2, returning nearly to 2019 emission levels of 36.7 Gt CO2. Emissions in China are expected to be 7% higher in 2021 than in 2019 (reaching 11.1 Gt CO2) and only slightly higher in India (a 3% increase in 2021 relative to 2019, and reaching 2.7 Gt CO2). In contrast, projected 2021 emissions in the United States (5.1 Gt CO2), European Union (2.8 Gt CO2), and rest of the world (14.8 Gt CO2, in aggregate) remain below 2019 levels. For fuels, CO2 emissions from coal in 2021 are expected to rebound above 2019 levels to 14.7 Gt CO2, primarily because of increased coal use in China, and will remain only slightly (0.8%) below their previous peak in 2014. Emissions from natural gas use should also rise above 2019 levels in 2021, continuing a steady trend of rising gas use that dates back at least sixty years. Only CO2 emissions from oil remain well below 2019 levels in 2021., Comment: 14 pages, 5 figures

Published
2021
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2. On the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century

Author

Hauck, J., primary, Völker, C., additional, Wolf‐Gladrow, D. A., additional, Laufkötter, C., additional, Vogt, M., additional, Aumont, O., additional, Bopp, L., additional, Buitenhuis, E. T., additional, Doney, S. C., additional, Dunne, J., additional, Gruber, N., additional, Hashioka, T., additional, John, J., additional, Quéré, C. Le, additional, Lima, I. D., additional, Nakano, H., additional, Séférian, R., additional, and Totterdell, I., additional

Published
2015
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3. Couplings Between Changes in the Climate System and Biogeochemistry

Author

Denman, Kenneth L., Brasseur, Guy, Chidthaisong, Amnat, Ciais, Philippe, Cox, Peter M., Dickinson, Robert E., Hauglustaine, Didier, Heinze, Christoph, Holland, Elisabeth, Jacob, Daniel, Lohmann, Ulrike, Ramachandran, Srikanthan, Dias, Pedro Leite da Silva, Wofsy, Steven C., Zhang, Xiaoye, Archer, D., Arora, V., Austin, J., Baker, D., Berry, J.A., Betts, R., Bonan, G., Bousquet, P., Canadell, J., Christian, J., Clark, D.A., Dameris, M., Dentener, F., Easterling, D., Eyring, V., Feichter, J., Friedlingstein, P., Fung, I., Fuzzi, S., Gong, S., Gruber, N., Guenther, A., Gurney, K., Henderson-Sellers, A., House, J., Jones, A., Jones, C., Kärcher, B., Kawamiya, M., Lassey, K., Quéré, C. Le, Leck, C., Lee-Taylor, J., Malhi, Y., Masarie, K., Mcfiggans, G., Menon, S., Miller, J.B., Peylin, P., Pitman, A., Quaas, J., Raupach, M., Rayner, P., Rehder, G., Riebesell, U., Rödenbeck, C., Rotstayn, L., Roulet, N., Sabine, C., Schultz, M.G., Schulz, M., Schwartz, S.E., Steffen, W., Stevenson, D., Tian, Y., Trenberth, K.E., Noije, T. Van, Wild, O., Zhang, T., Zhou, L., Denman, Kenneth, Boonpragob, Kansri, Heimann, Martin, Germany, Switzerland, Molina, Mario, Da, P, Dias, Silva, Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), ICOS-ATC (ICOS-ATC), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Modelling the Earth Response to Multiple Anthropogenic Interactions and Dynamics (MERMAID), Modélisation INVerse pour les mesures atmosphériques et SATellitaires (SATINV), and Modélisation des Surfaces et Interfaces Continentales (MOSAIC)

Subjects
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2007

4. The carbon cycle and atmospheric carbon dioxide

Author

Prentice, I.C., Farquhar, G.D., Fasham, M.J.R., Goulden, M.L., Heimann, M., Jaramillo, V.J., Kheshgi, H.S., Quéré, C. Le, Scholes, R.J., Wallace, D.W.R., Archer, D., Ashmore, M.R., Aumont, Olivier, Baker, D., Battle, M., Bender, M., Bopp, L.P., Bousquet, P., Caldeira, K., Ciais, P., Cox, P.M., Cramer, W., Dentener, F., Enting, I.G., Field, C.B., Friedlingstein, P., Holland, E.A., Houghton, R.A., House, J.I., Ishida, A., Jain, A.K., Janssens, I.A., Joos, F., Kaminski, T., Keeling, C.D., Keeling, R.F., Kicklighter, D.W., Kohfeld, K.E., Knorr, W., Law, R., Lenton, T., Lindsay, K., Maier-Reimer, E., Manning, A.C., Matear, R.J., McGuire, A.D., Melillo, J.M., Meyer, R., Mund, M., Orr, J.C., Piper, S., Plattner, K., Rayner, P.J., Sitch, S., Slater, R., Taguchi, S., Tans, P.P., Tian, H.Q., Weirig, M.F., Whorf, T., Yool, A., Laboratoire d'océanographie dynamique et de climatologie (LODYC), Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Modélisation INVerse pour les mesures atmosphériques et SATellitaires (SATINV), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), ICOS-ATC (ICOS-ATC), Modelling the Earth Response to Multiple Anthropogenic Interactions and Dynamics (MERMAID), Aptel, Florence, Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), and Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)

Subjects
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment, [SDU.ENVI] Sciences of the Universe [physics]/Continental interfaces, environment, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2001

5. The distribution, dominance patterns and ecological niches of plankton functional types in Dynamic Green Ocean Models and satellite estimates

Author

Vogt, M., primary, Hashioka, T., additional, Payne, M. R., additional, Buitenhuis, E. T., additional, Quéré, C. Le, additional, Alvain, S., additional, Aita, M. N., additional, Bopp, L., additional, Doney, S. C., additional, Hirata, T., additional, Lima, I., additional, Sailley, S., additional, and Yamanaka, Y., additional

Published
2013
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9. Drivers and uncertainties of future global marine primary production in marine ecosystem models.

Author

Laufkötter, C., Vogt, M., Gruber, N., Aita-Noguchi, M., Aumont, O., Bopp, L., Buitenhuis, E., Doney, S. C., Dunne, J., Hashioka, T., Hauck, J., Hirata, T., John, J., Quéré, C. Le, Lima, I. D., Nakano, H., Seferian, R., Totterdell, I., Vichi, M., and Völker, C.

Subjects
EMISSIONS (Air pollution), CLIMATOLOGY, PHYTOPLANKTON, ECOSYSTEMS, EARTH sciences
Abstract

Past model studies have projected a global decrease in marine net primary production (NPP) over the 21st century, but these studies focused on the multi-model mean rather than on the large inter-model differences. Here, we analyze model-simulated changes in NPP for the 21st century under IPCC's high-emission scenario RCP8.5. We use a suite of nine coupled carbon-climate Earth system models with embedded marine ecosystem models and focus on the spread between the different models and the underlying reasons. Globally, NPP decreases in five out of the nine models over the course of the 21st century, while three show no significant trend and one even simulates an increase. The largest model spread occurs in the low latitudes (between 30° S and 30° N), with individual models simulating relative changes between -25 and +40 %. Of the seven models diagnosing a net decrease in NPP in the low latitudes, only three simulate this to be a consequence of the classical interpretation, i.e., a stronger nutrient limitation due to increased stratification leading to reduced phytoplankton growth. In the other four, warming-induced increases in phytoplankton growth outbalance the stronger nutrient limitation. However, temperaturedriven increases in grazing and other loss processes cause a net decrease in phytoplankton biomass and reduce NPP despite higher growth rates. One model projects a strong increase in NPP in the low latitudes, caused by an intensification of the microbial loop, while NPP in the remaining model changes by less than 0.5 %. While models consistently project increases NPP in the Southern Ocean, the regional inter-model range is also very substantial. In most models, this increase in NPP is driven by temperature, but it is also modulated by changes in light, macronutrients and iron as well as grazing. Overall, current projections of future changes in global marine NPP are subject to large uncertainties and necessitate a dedicated and sustained effort to improve the models and the concepts and data that guide their development. [ABSTRACT FROM AUTHOR]

Published
2015
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10. On the Southern Ocean CO2 uptake and the role of the biological carbon pump in the 21st century.

Author

Hauck, J., Völker, C., Wolf-Gladrow, D. A., Laufkötter, C., Vogt, M., Aumont, O., Bopp, L., Buitenhuis, E. T., Doney, S. C., Dunne, J., Gruber, N., Hashioka, T., John, J., Quéré, C. Le, Lima, I. D., Nakano, H., Séférian, R., and Totterdell, I.

Subjects
CARBON dioxide mitigation, CARBON cycle, TWENTY-first century, MARINE ecosystem management, ANTARCTIC oscillation
Abstract

We use a suite of eight ocean biogeochemical/ecological general circulation models from the Marine Ecosystem Model Intercomparison Project and Coupled Model Intercomparison Project Phase 5 archives to explore the relative roles of changes in winds (positive trend of Southern Annular Mode, SAM) and in warming- and freshening-driven trends of upper ocean stratification in altering export production and CO2 uptake in the Southern Ocean at the end of the 21st century. The investigated models simulate a broad range of responses to climate change, with no agreement on a dominance of either the SAM or the warming signal south of 44°S. In the southernmost zone, i.e., south of 58°S, they concur on an increase of biological export production, while between 44 and 58°S the models lack consensus on the sign of change in export. Yet in both regions, the models show an enhanced CO2 uptake during spring and summer. This is due to a larger CO2(aq) drawdown by the same amount of summer export production at a higher Revelle factor at the end of the 21st century. This strongly increases the importance of the biological carbon pump in the entire Southern Ocean. In the temperate zone, between 30 and 44°S, all models show a predominance of the warming signal and a nutrient-driven reduction of export production. As a consequence, the share of the regions south of 44°S to the total uptake of the Southern Ocean south of 30°S is projected to increase at the end of the 21st century from 47 to 66% with a commensurable decrease to the north. Despite this major reorganization of the meridional distribution of the major regions of uptake, the total uptake increases largely in line with the rising atmospheric CO2. Simulations with the MITgcm-REcoM2 model show that this is mostly driven by the strong increase of atmospheric CO2, with the climate-driven changes of natural CO2 exchange offsetting that trend only to a limited degree (∼10%) and with negligible impact of climate effects on anthropogenic CO2 uptake when integrated over a full annual cycle south of 30°S. [ABSTRACT FROM AUTHOR]

Published
2015
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11. Climate sensitivity in the Anthropocene.

Author

Previdi, M., Liepert, B. G., Peteet, D. T., Hansen, J., Beerling, D. J., Broccoli, A. J., Frolking, S., Galloway, J. N., Heimann, M., Quéré, C. Le, Levitus, S., and Ramaswamy, V.

Subjects
CLIMATOLOGY, EFFECT of human beings on climate change, BIOENERGETICS, CARBON cycle, EARTH (Planet)
Abstract

The article explores climate sensitivity in the Anthropocene to avoid dangerous anthropogenic interference with the climate system. It discusses climate sensitivity which depends on climate feedbacks' sign and strength. It defines climate feedback which is induced by a climate forcing. It also discusses related topics including Earth's energy balance, feedback sensitivity, and carbon cycle feedbacks.

Published
2011
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12. Anthropogenic CO2 emissions.

Author

Raupach, M. R., Quéré, C. Le, Peters, G. P., and Canadell, J. G.

Subjects
CARBON dioxide & the environment, CARBON dioxide mitigation, ATMOSPHERIC carbon dioxide & the environment
Abstract

A letter to the editor is presented in response to the article by R. J. Francey and colleagues which discusses the use of carbon dioxide (CO2) measurements to infer an inderestimation in emissions from 1994-2007.

Published
2013
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