Changes in net ecosystem exchange of CO2 in Arctic and their relationships with climate change during 2002–2017

Arctic warming leads to permafrost degradation, which can increase ecosystem respiration and release more greenhouse gas into the atmosphere. Meanwhile, climate warming also promotes the plant growth and increases carbon assimilation. Presently, it is largely unknown about the carbon budget and thei...

Full description

Bibliographic Details
Published in:Advances in Climate Change Research
Main Authors: Zhi-Long Li, Cui-Cui Mu, Xu Chen, Xing-Yu Wang, Wen-Wen Dong, Lin Jia, Mei Mu, Irina Streletskaya, Valery Grebenets, Sergey Sokratov, Alexander Kizyakov, Xiao-Dong Wu
Format: Article in Journal/Newspaper
Language:English
Published: KeAi Communications Co., Ltd. 2021
Subjects:
Online Access:https://doi.org/10.1016/j.accre.2021.06.004
https://doaj.org/article/8dfacd109ff544ec97cde56cf93f3098
id ftdoajarticles:oai:doaj.org/article:8dfacd109ff544ec97cde56cf93f3098
record_format openpolar
spelling ftdoajarticles:oai:doaj.org/article:8dfacd109ff544ec97cde56cf93f3098 2023-05-15T14:43:20+02:00 Changes in net ecosystem exchange of CO2 in Arctic and their relationships with climate change during 2002–2017 Zhi-Long Li Cui-Cui Mu Xu Chen Xing-Yu Wang Wen-Wen Dong Lin Jia Mei Mu Irina Streletskaya Valery Grebenets Sergey Sokratov Alexander Kizyakov Xiao-Dong Wu 2021-08-01T00:00:00Z https://doi.org/10.1016/j.accre.2021.06.004 https://doaj.org/article/8dfacd109ff544ec97cde56cf93f3098 EN eng KeAi Communications Co., Ltd. http://www.sciencedirect.com/science/article/pii/S167492782100085X https://doaj.org/toc/1674-9278 1674-9278 doi:10.1016/j.accre.2021.06.004 https://doaj.org/article/8dfacd109ff544ec97cde56cf93f3098 Advances in Climate Change Research, Vol 12, Iss 4, Pp 475-481 (2021) Arctic Climate change Permafrost Carbon flux Ecosystem Eddy covariance Meteorology. Climatology QC851-999 Social sciences (General) H1-99 article 2021 ftdoajarticles https://doi.org/10.1016/j.accre.2021.06.004 2022-12-31T07:09:00Z Arctic warming leads to permafrost degradation, which can increase ecosystem respiration and release more greenhouse gas into the atmosphere. Meanwhile, climate warming also promotes the plant growth and increases carbon assimilation. Presently, it is largely unknown about the carbon budget and their responses to climate change in the Arctic regions. In this study, to investigate the seasonal and annual net ecosystem carbon exchange (NEE), we collected 71 observation stations for net ecosystem exchange (NEE) of CO2 in the high latitude permafrost regions during 2002–2017. The results showed that the annual NEE was −8.2 ± 4.1 g CO2 m−2 d−1 for forest, −3.3 ± 2.6 g CO2 m−2 d−1 for shrub, −4.8 ± 4.1 g CO2 m−2 d−1 for grassland, −3.6 ± 3.0 g CO2 m−2 d−1 for wetland and 0.02 ± 0.62 g CO2 m−2 d−1 for tundra, respectively. From 2002 to 2017, the CO2 emissions of grassland (carbon source) showed a decreasing trend, and the CO2 assimilation of shrub and forest (carbon sink) has been increased. The wetland and tundra are shifting from carbon sources to sinks. There were great variations in temperature sensitivities (Q10) of NEE in different seasons, with larger values in winter and lower values in summer. These findings indicate that the Arctic terrestrial ecosystem presently acts as a carbon sink, while there is a possibility that future warming, especially the warming in winter, may decrease the carbon sink of the Arctic terrestrial ecosystem. Article in Journal/Newspaper Arctic Climate change permafrost Tundra Directory of Open Access Journals: DOAJ Articles Arctic Advances in Climate Change Research 12 4 475 481
institution Open Polar
collection Directory of Open Access Journals: DOAJ Articles
op_collection_id ftdoajarticles
language English
topic Arctic
Climate change
Permafrost
Carbon flux
Ecosystem
Eddy covariance
Meteorology. Climatology
QC851-999
Social sciences (General)
H1-99
spellingShingle Arctic
Climate change
Permafrost
Carbon flux
Ecosystem
Eddy covariance
Meteorology. Climatology
QC851-999
Social sciences (General)
H1-99
Zhi-Long Li
Cui-Cui Mu
Xu Chen
Xing-Yu Wang
Wen-Wen Dong
Lin Jia
Mei Mu
Irina Streletskaya
Valery Grebenets
Sergey Sokratov
Alexander Kizyakov
Xiao-Dong Wu
Changes in net ecosystem exchange of CO2 in Arctic and their relationships with climate change during 2002–2017
topic_facet Arctic
Climate change
Permafrost
Carbon flux
Ecosystem
Eddy covariance
Meteorology. Climatology
QC851-999
Social sciences (General)
H1-99
description Arctic warming leads to permafrost degradation, which can increase ecosystem respiration and release more greenhouse gas into the atmosphere. Meanwhile, climate warming also promotes the plant growth and increases carbon assimilation. Presently, it is largely unknown about the carbon budget and their responses to climate change in the Arctic regions. In this study, to investigate the seasonal and annual net ecosystem carbon exchange (NEE), we collected 71 observation stations for net ecosystem exchange (NEE) of CO2 in the high latitude permafrost regions during 2002–2017. The results showed that the annual NEE was −8.2 ± 4.1 g CO2 m−2 d−1 for forest, −3.3 ± 2.6 g CO2 m−2 d−1 for shrub, −4.8 ± 4.1 g CO2 m−2 d−1 for grassland, −3.6 ± 3.0 g CO2 m−2 d−1 for wetland and 0.02 ± 0.62 g CO2 m−2 d−1 for tundra, respectively. From 2002 to 2017, the CO2 emissions of grassland (carbon source) showed a decreasing trend, and the CO2 assimilation of shrub and forest (carbon sink) has been increased. The wetland and tundra are shifting from carbon sources to sinks. There were great variations in temperature sensitivities (Q10) of NEE in different seasons, with larger values in winter and lower values in summer. These findings indicate that the Arctic terrestrial ecosystem presently acts as a carbon sink, while there is a possibility that future warming, especially the warming in winter, may decrease the carbon sink of the Arctic terrestrial ecosystem.
format Article in Journal/Newspaper
author Zhi-Long Li
Cui-Cui Mu
Xu Chen
Xing-Yu Wang
Wen-Wen Dong
Lin Jia
Mei Mu
Irina Streletskaya
Valery Grebenets
Sergey Sokratov
Alexander Kizyakov
Xiao-Dong Wu
author_facet Zhi-Long Li
Cui-Cui Mu
Xu Chen
Xing-Yu Wang
Wen-Wen Dong
Lin Jia
Mei Mu
Irina Streletskaya
Valery Grebenets
Sergey Sokratov
Alexander Kizyakov
Xiao-Dong Wu
author_sort Zhi-Long Li
title Changes in net ecosystem exchange of CO2 in Arctic and their relationships with climate change during 2002–2017
title_short Changes in net ecosystem exchange of CO2 in Arctic and their relationships with climate change during 2002–2017
title_full Changes in net ecosystem exchange of CO2 in Arctic and their relationships with climate change during 2002–2017
title_fullStr Changes in net ecosystem exchange of CO2 in Arctic and their relationships with climate change during 2002–2017
title_full_unstemmed Changes in net ecosystem exchange of CO2 in Arctic and their relationships with climate change during 2002–2017
title_sort changes in net ecosystem exchange of co2 in arctic and their relationships with climate change during 2002–2017
publisher KeAi Communications Co., Ltd.
publishDate 2021
url https://doi.org/10.1016/j.accre.2021.06.004
https://doaj.org/article/8dfacd109ff544ec97cde56cf93f3098
geographic Arctic
geographic_facet Arctic
genre Arctic
Climate change
permafrost
Tundra
genre_facet Arctic
Climate change
permafrost
Tundra
op_source Advances in Climate Change Research, Vol 12, Iss 4, Pp 475-481 (2021)
op_relation http://www.sciencedirect.com/science/article/pii/S167492782100085X
https://doaj.org/toc/1674-9278
1674-9278
doi:10.1016/j.accre.2021.06.004
https://doaj.org/article/8dfacd109ff544ec97cde56cf93f3098
op_doi https://doi.org/10.1016/j.accre.2021.06.004
container_title Advances in Climate Change Research
container_volume 12
container_issue 4
container_start_page 475
op_container_end_page 481
_version_ 1766315003912126464