Siberian and temperate ecosystems shape Northern Hemisphere atmospheric CO2 seasonal amplification

• Published in: Proceedings of the National Academy of Sciences
• Main Authors: 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
• Other Authors: 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), Modélisation INVerse pour les mesures atmosphériques et SATellitaires (SATINV), 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), 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
• Language: English
• Published: HAL CCSD 2020
• Subjects: Amplification; Arctic-boreal; Carbon dioxide; Global change; Seasonal cycle; [SDV]Life Sciences [q-bio]; Arctic; Browning; Siberia
• Online Access: https://hal.archives-ouvertes.fr/hal-03032371; https://hal.archives-ouvertes.fr/hal-03032371/document; https://hal.archives-ouvertes.fr/hal-03032371/file/21079.full.pdf; https://doi.org/10.1073/pnas.1914135117

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...