Siberian and temperate ecosystems shape Northern Hemisphere atmospheric CO2 seasonal amplification
International audience The amplitude of the atmospheric CO2 seasonal cycle has increased by 30 to 50% in the Northern Hemisphere (NH) since the 1960s, suggesting widespread ecological changes in the northern extratropics. However, substantial uncertainty remains in the continental and regional drive...
Published in: | Proceedings of the National Academy of Sciences |
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Main Authors: | , , , , , , , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2020
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Subjects: | |
Online Access: | https://hal.science/hal-03032371 https://hal.science/hal-03032371/document https://hal.science/hal-03032371/file/21079.full.pdf https://doi.org/10.1073/pnas.1914135117 |
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Open Polar |
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Archives ouvertes de Paris-Saclay |
op_collection_id |
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language |
English |
topic |
Amplification Arctic-boreal Carbon dioxide Global change Seasonal cycle [SDV]Life Sciences [q-bio] |
spellingShingle |
Amplification Arctic-boreal Carbon dioxide Global change Seasonal cycle [SDV]Life Sciences [q-bio] Lin, Xin Rogers, Brendan M. Sweeney, Colm O. Chevallier, Frédéric Arshinov, Mikhail Yu Dlugokencky, Edward J. Machida, Toshinobu Sasakawa, Motoki Tans, Pieter P. Keppel-Aleks, Gretchen Siberian and temperate ecosystems shape Northern Hemisphere atmospheric CO2 seasonal amplification |
topic_facet |
Amplification Arctic-boreal Carbon dioxide Global change Seasonal cycle [SDV]Life Sciences [q-bio] |
description |
International audience The amplitude of the atmospheric CO2 seasonal cycle has increased by 30 to 50% in the Northern Hemisphere (NH) since the 1960s, suggesting widespread ecological changes in the northern extratropics. However, substantial uncertainty remains in the continental and regional drivers of this prominent amplitude increase. Here we present a quantitative regional attribution of CO2 seasonal amplification over the past 4 decades, using a tagged atmospheric transport model prescribed with observationally constrained fluxes. We find that seasonal flux changes in Siberian and temperate ecosystems together shape the observed amplitude increases in the NH. At the surface of northern high latitudes, enhanced seasonal carbon exchange in Siberia is the dominant contributor (followed by temperate ecosystems). Arctic-boreal North America shows much smaller changes in flux seasonality and has only localized impacts. These continental contrasts, based on an atmospheric approach, corroborate heterogeneous vegetation greening and browning trends from field and remote-sensing observations, providing independent evidence for regionally divergent ecological responses and carbon dynamics to global change drivers. Over surface midlatitudes and throughout the midtroposphere, increased seasonal carbon exchange in temperate ecosystems is the dominant contributor to CO2 amplification, albeit with considerable contributions from Siberia. Representing the mechanisms that control the high-latitude asymmetry in flux amplification found in this study should be an important goal for mechanistic land surface models moving forward. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) 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)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Modélisation INVerse pour les mesures atmosphériques et SATellitaires (SATINV) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-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)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) National Aeronautics and Space Administration, NASA: NNX17AE13G, NNX17AC61A ACKNOWLEDGMENTS. This study was funded by a NASA Carbon Cycle Science and Arctic-Boreal Vulnerability Experiment (ABoVE) grant (NNX17AE13G) to X.L., G.K.-A., and B.M.R., as well as a NASA ABoVE grant (NNX17AC61A) to C.S. M.S. acknowledges financial support by the Global Environmental Research Coordination System from Ministry of the Environment of Japan. We thank data providers of two CO2 inversion products: CAMS version 17r1 from European Centre for Medium-Range Weather Forecast and CarbonTracker CT2017 provided by NOAA’s Global Monitoring Laboratory, Boulder, CO. We are grateful to the GEOS-Chem model development group and the HYbrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) development group. We also thank L. Birch for valuable discussions. This research was supported in part through computational resources and services provided by Advanced Research Computing at the University of Michigan, Ann Arbor. |
format |
Article in Journal/Newspaper |
author |
Lin, Xin Rogers, Brendan M. Sweeney, Colm O. Chevallier, Frédéric Arshinov, Mikhail Yu Dlugokencky, Edward J. Machida, Toshinobu Sasakawa, Motoki Tans, Pieter P. Keppel-Aleks, Gretchen |
author_facet |
Lin, Xin Rogers, Brendan M. Sweeney, Colm O. Chevallier, Frédéric Arshinov, Mikhail Yu Dlugokencky, Edward J. Machida, Toshinobu Sasakawa, Motoki Tans, Pieter P. Keppel-Aleks, Gretchen |
author_sort |
Lin, Xin |
title |
Siberian and temperate ecosystems shape Northern Hemisphere atmospheric CO2 seasonal amplification |
title_short |
Siberian and temperate ecosystems shape Northern Hemisphere atmospheric CO2 seasonal amplification |
title_full |
Siberian and temperate ecosystems shape Northern Hemisphere atmospheric CO2 seasonal amplification |
title_fullStr |
Siberian and temperate ecosystems shape Northern Hemisphere atmospheric CO2 seasonal amplification |
title_full_unstemmed |
Siberian and temperate ecosystems shape Northern Hemisphere atmospheric CO2 seasonal amplification |
title_sort |
siberian and temperate ecosystems shape northern hemisphere atmospheric co2 seasonal amplification |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-03032371 https://hal.science/hal-03032371/document https://hal.science/hal-03032371/file/21079.full.pdf https://doi.org/10.1073/pnas.1914135117 |
long_lat |
ENVELOPE(164.050,164.050,-74.617,-74.617) |
geographic |
Arctic Browning |
geographic_facet |
Arctic Browning |
genre |
Arctic Siberia |
genre_facet |
Arctic Siberia |
op_source |
ISSN: 0027-8424 EISSN: 1091-6490 Proceedings of the National Academy of Sciences of the United States of America https://hal.science/hal-03032371 Proceedings of the National Academy of Sciences of the United States of America, 2020, 117 (35), pp.21079-21087. ⟨10.1073/pnas.1914135117⟩ |
op_relation |
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op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1073/pnas.1914135117 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
117 |
container_issue |
35 |
container_start_page |
21079 |
op_container_end_page |
21087 |
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spelling |
ftuniparissaclay:oai:HAL:hal-03032371v1 2024-10-06T13:46:20+00:00 Siberian and temperate ecosystems shape Northern Hemisphere atmospheric CO2 seasonal amplification Lin, Xin Rogers, Brendan M. Sweeney, Colm O. Chevallier, Frédéric Arshinov, Mikhail Yu Dlugokencky, Edward J. Machida, Toshinobu Sasakawa, Motoki Tans, Pieter P. Keppel-Aleks, Gretchen Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) 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)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Modélisation INVerse pour les mesures atmosphériques et SATellitaires (SATINV) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-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)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) National Aeronautics and Space Administration, NASA: NNX17AE13G, NNX17AC61A ACKNOWLEDGMENTS. This study was funded by a NASA Carbon Cycle Science and Arctic-Boreal Vulnerability Experiment (ABoVE) grant (NNX17AE13G) to X.L., G.K.-A., and B.M.R., as well as a NASA ABoVE grant (NNX17AC61A) to C.S. M.S. acknowledges financial support by the Global Environmental Research Coordination System from Ministry of the Environment of Japan. We thank data providers of two CO2 inversion products: CAMS version 17r1 from European Centre for Medium-Range Weather Forecast and CarbonTracker CT2017 provided by NOAA’s Global Monitoring Laboratory, Boulder, CO. We are grateful to the GEOS-Chem model development group and the HYbrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) development group. We also thank L. Birch for valuable discussions. This research was supported in part through computational resources and services provided by Advanced Research Computing at the University of Michigan, Ann Arbor. 2020-09-01 https://hal.science/hal-03032371 https://hal.science/hal-03032371/document https://hal.science/hal-03032371/file/21079.full.pdf https://doi.org/10.1073/pnas.1914135117 en eng HAL CCSD National Academy of Sciences info:eu-repo/semantics/altIdentifier/doi/10.1073/pnas.1914135117 info:eu-repo/semantics/altIdentifier/pmid/32817563 hal-03032371 https://hal.science/hal-03032371 https://hal.science/hal-03032371/document https://hal.science/hal-03032371/file/21079.full.pdf doi:10.1073/pnas.1914135117 PUBMED: 32817563 info:eu-repo/semantics/OpenAccess ISSN: 0027-8424 EISSN: 1091-6490 Proceedings of the National Academy of Sciences of the United States of America https://hal.science/hal-03032371 Proceedings of the National Academy of Sciences of the United States of America, 2020, 117 (35), pp.21079-21087. ⟨10.1073/pnas.1914135117⟩ Amplification Arctic-boreal Carbon dioxide Global change Seasonal cycle [SDV]Life Sciences [q-bio] info:eu-repo/semantics/article Journal articles 2020 ftuniparissaclay https://doi.org/10.1073/pnas.1914135117 2024-09-06T00:30:30Z International audience The amplitude of the atmospheric CO2 seasonal cycle has increased by 30 to 50% in the Northern Hemisphere (NH) since the 1960s, suggesting widespread ecological changes in the northern extratropics. However, substantial uncertainty remains in the continental and regional drivers of this prominent amplitude increase. Here we present a quantitative regional attribution of CO2 seasonal amplification over the past 4 decades, using a tagged atmospheric transport model prescribed with observationally constrained fluxes. We find that seasonal flux changes in Siberian and temperate ecosystems together shape the observed amplitude increases in the NH. At the surface of northern high latitudes, enhanced seasonal carbon exchange in Siberia is the dominant contributor (followed by temperate ecosystems). Arctic-boreal North America shows much smaller changes in flux seasonality and has only localized impacts. These continental contrasts, based on an atmospheric approach, corroborate heterogeneous vegetation greening and browning trends from field and remote-sensing observations, providing independent evidence for regionally divergent ecological responses and carbon dynamics to global change drivers. Over surface midlatitudes and throughout the midtroposphere, increased seasonal carbon exchange in temperate ecosystems is the dominant contributor to CO2 amplification, albeit with considerable contributions from Siberia. Representing the mechanisms that control the high-latitude asymmetry in flux amplification found in this study should be an important goal for mechanistic land surface models moving forward. Article in Journal/Newspaper Arctic Siberia Archives ouvertes de Paris-Saclay Arctic Browning ENVELOPE(164.050,164.050,-74.617,-74.617) Proceedings of the National Academy of Sciences 117 35 21079 21087 |