Multi-year observations reveal a larger than expected autumn respiration signal across northeast Eurasia
International audience Site-level observations have shown pervasive cold season CO 2 release across Arctic and boreal ecosystems, impacting annual carbon budgets. Still, the seasonality of CO 2 emissions are poorly quantified across much of the high latitudes due to the sparse coverage of site-level...
Published in: | Biogeosciences |
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Main Authors: | , , , , , , , , , , , , , , , , , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2022
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Subjects: | |
Online Access: | https://hal-insu.archives-ouvertes.fr/insu-03824351 https://hal-insu.archives-ouvertes.fr/insu-03824351/document https://hal-insu.archives-ouvertes.fr/insu-03824351/file/bg-19-4779-2022.pdf https://doi.org/10.5194/bg-19-4779-2022 |
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institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
CO2 Arctic Boreal ecosystems Soil carbon [SDU]Sciences of the Universe [physics] |
spellingShingle |
CO2 Arctic Boreal ecosystems Soil carbon [SDU]Sciences of the Universe [physics] Byrne, Brendan Liu, Junjie Yi, Yonghong Chatterjee, Abhishek Basu, Sourish Cheng, Rui Doughty, Russell Chevallier, Frédéric Bowman, Kevin W. Parazoo, Nicholas C. Crisp, David Li, Xing Xiao, Jingfeng Sitch, Stephen Guenet, Bertrand Deng, Feng Johnson, Matthew S. Philip, Sajeev Mcguire, Patrick C. Miller, Charles E. Multi-year observations reveal a larger than expected autumn respiration signal across northeast Eurasia |
topic_facet |
CO2 Arctic Boreal ecosystems Soil carbon [SDU]Sciences of the Universe [physics] |
description |
International audience Site-level observations have shown pervasive cold season CO 2 release across Arctic and boreal ecosystems, impacting annual carbon budgets. Still, the seasonality of CO 2 emissions are poorly quantified across much of the high latitudes due to the sparse coverage of site-level observations. Space-based observations provide the opportunity to fill some observational gaps for studying these high-latitude ecosystems, particularly across poorly sampled regions of Eurasia. Here, we show that data-driven net ecosystem exchange (NEE) from atmospheric CO 2 observations implies strong summer uptake followed by strong autumn release of CO 2 over the entire cold northeastern region of Eurasia during the 2015-2019 study period. Combining data-driven NEE with satellite-based estimates of gross primary production (GPP), we show that this seasonality implies less summer heterotrophic respiration (R h ) and greater autumn R h than would be expected given an exponential relationship between respiration and surface temperature. Furthermore, we show that this seasonality of NEE and R h over northeastern Eurasia is not captured by the TRENDY v8 ensemble of dynamic global vegetation models (DGVMs), which estimate that 47 %-57 % (interquartile range) of annual R h occurs during August-April, while the data-driven estimates suggest 59 %-76 % of annual R h occurs over this period. We explain this seasonal shift in R h by respiration from soils at depth during the zero-curtain period, when sub-surface soils remain unfrozen up to several months after the surface has frozen. Additional impacts of physical processes related to freeze-thaw dynamics may contribute to the seasonality of R h . This study confirms a significant and spatially extensive early cold season CO 2 efflux in the permafrost-rich region of northeast Eurasia and suggests that autumn R h from subsurface soils in the northern high latitudes is not well captured by current DGVMs. |
author2 |
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) Laboratoire de géologie de l'ENS (LGENS) Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL) This research has been supported by the National Aeronautics and Space Administration (grant nos. 80NSSC21K1068, NNH17ZDA001N-OCO2, and NNH18ZDA001N-TE). |
format |
Article in Journal/Newspaper |
author |
Byrne, Brendan Liu, Junjie Yi, Yonghong Chatterjee, Abhishek Basu, Sourish Cheng, Rui Doughty, Russell Chevallier, Frédéric Bowman, Kevin W. Parazoo, Nicholas C. Crisp, David Li, Xing Xiao, Jingfeng Sitch, Stephen Guenet, Bertrand Deng, Feng Johnson, Matthew S. Philip, Sajeev Mcguire, Patrick C. Miller, Charles E. |
author_facet |
Byrne, Brendan Liu, Junjie Yi, Yonghong Chatterjee, Abhishek Basu, Sourish Cheng, Rui Doughty, Russell Chevallier, Frédéric Bowman, Kevin W. Parazoo, Nicholas C. Crisp, David Li, Xing Xiao, Jingfeng Sitch, Stephen Guenet, Bertrand Deng, Feng Johnson, Matthew S. Philip, Sajeev Mcguire, Patrick C. Miller, Charles E. |
author_sort |
Byrne, Brendan |
title |
Multi-year observations reveal a larger than expected autumn respiration signal across northeast Eurasia |
title_short |
Multi-year observations reveal a larger than expected autumn respiration signal across northeast Eurasia |
title_full |
Multi-year observations reveal a larger than expected autumn respiration signal across northeast Eurasia |
title_fullStr |
Multi-year observations reveal a larger than expected autumn respiration signal across northeast Eurasia |
title_full_unstemmed |
Multi-year observations reveal a larger than expected autumn respiration signal across northeast Eurasia |
title_sort |
multi-year observations reveal a larger than expected autumn respiration signal across northeast eurasia |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal-insu.archives-ouvertes.fr/insu-03824351 https://hal-insu.archives-ouvertes.fr/insu-03824351/document https://hal-insu.archives-ouvertes.fr/insu-03824351/file/bg-19-4779-2022.pdf https://doi.org/10.5194/bg-19-4779-2022 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic permafrost |
genre_facet |
Arctic permafrost |
op_source |
Biogeosciences https://hal-insu.archives-ouvertes.fr/insu-03824351 Biogeosciences, 2022, 19, pp.4779-4799. ⟨10.5194/bg-19-4779-2022⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-19-4779-2022 insu-03824351 https://hal-insu.archives-ouvertes.fr/insu-03824351 https://hal-insu.archives-ouvertes.fr/insu-03824351/document https://hal-insu.archives-ouvertes.fr/insu-03824351/file/bg-19-4779-2022.pdf BIBCODE: 2022BGeo.19.4779B doi:10.5194/bg-19-4779-2022 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/bg-19-4779-2022 |
container_title |
Biogeosciences |
container_volume |
19 |
container_issue |
19 |
container_start_page |
4779 |
op_container_end_page |
4799 |
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1766334162006966272 |
spelling |
ftunivnantes:oai:HAL:insu-03824351v1 2023-05-15T15:02:11+02:00 Multi-year observations reveal a larger than expected autumn respiration signal across northeast Eurasia Byrne, Brendan Liu, Junjie Yi, Yonghong Chatterjee, Abhishek Basu, Sourish Cheng, Rui Doughty, Russell Chevallier, Frédéric Bowman, Kevin W. Parazoo, Nicholas C. Crisp, David Li, Xing Xiao, Jingfeng Sitch, Stephen Guenet, Bertrand Deng, Feng Johnson, Matthew S. Philip, Sajeev Mcguire, Patrick C. Miller, Charles E. 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) Laboratoire de géologie de l'ENS (LGENS) Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL) This research has been supported by the National Aeronautics and Space Administration (grant nos. 80NSSC21K1068, NNH17ZDA001N-OCO2, and NNH18ZDA001N-TE). 2022 https://hal-insu.archives-ouvertes.fr/insu-03824351 https://hal-insu.archives-ouvertes.fr/insu-03824351/document https://hal-insu.archives-ouvertes.fr/insu-03824351/file/bg-19-4779-2022.pdf https://doi.org/10.5194/bg-19-4779-2022 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-19-4779-2022 insu-03824351 https://hal-insu.archives-ouvertes.fr/insu-03824351 https://hal-insu.archives-ouvertes.fr/insu-03824351/document https://hal-insu.archives-ouvertes.fr/insu-03824351/file/bg-19-4779-2022.pdf BIBCODE: 2022BGeo.19.4779B doi:10.5194/bg-19-4779-2022 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess Biogeosciences https://hal-insu.archives-ouvertes.fr/insu-03824351 Biogeosciences, 2022, 19, pp.4779-4799. ⟨10.5194/bg-19-4779-2022⟩ CO2 Arctic Boreal ecosystems Soil carbon [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2022 ftunivnantes https://doi.org/10.5194/bg-19-4779-2022 2022-11-23T00:23:56Z International audience Site-level observations have shown pervasive cold season CO 2 release across Arctic and boreal ecosystems, impacting annual carbon budgets. Still, the seasonality of CO 2 emissions are poorly quantified across much of the high latitudes due to the sparse coverage of site-level observations. Space-based observations provide the opportunity to fill some observational gaps for studying these high-latitude ecosystems, particularly across poorly sampled regions of Eurasia. Here, we show that data-driven net ecosystem exchange (NEE) from atmospheric CO 2 observations implies strong summer uptake followed by strong autumn release of CO 2 over the entire cold northeastern region of Eurasia during the 2015-2019 study period. Combining data-driven NEE with satellite-based estimates of gross primary production (GPP), we show that this seasonality implies less summer heterotrophic respiration (R h ) and greater autumn R h than would be expected given an exponential relationship between respiration and surface temperature. Furthermore, we show that this seasonality of NEE and R h over northeastern Eurasia is not captured by the TRENDY v8 ensemble of dynamic global vegetation models (DGVMs), which estimate that 47 %-57 % (interquartile range) of annual R h occurs during August-April, while the data-driven estimates suggest 59 %-76 % of annual R h occurs over this period. We explain this seasonal shift in R h by respiration from soils at depth during the zero-curtain period, when sub-surface soils remain unfrozen up to several months after the surface has frozen. Additional impacts of physical processes related to freeze-thaw dynamics may contribute to the seasonality of R h . This study confirms a significant and spatially extensive early cold season CO 2 efflux in the permafrost-rich region of northeast Eurasia and suggests that autumn R h from subsurface soils in the northern high latitudes is not well captured by current DGVMs. Article in Journal/Newspaper Arctic permafrost Université de Nantes: HAL-UNIV-NANTES Arctic Biogeosciences 19 19 4779 4799 |