气候变化领域集成服务门户(CCPortal): Changes in net ecosystem exchange of CO2 in Arctic and their relationships with climate change during 2002

CCPortal

DOI	10.1016/j.accre.2021.06.004
	Changes in net ecosystem exchange of CO2 in Arctic and their relationships with climate change during 2002–2017
	Li Z.-L.; Mu C.-C.; Chen X.; Wang X.-Y.; Dong W.-W.; Jia L.; Mu M.; Streletskaya I.; Grebenets V.; Sokratov S.; Kizyakov A.; Wu X.-D.
发表日期	2021
ISSN	1674-9278
起始页码	475
结束页码	481
卷号	12 期号:4
英文摘要	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. © 2021 The Authors
英文关键词	Arctic; Carbon flux; Climate change; Ecosystem; Eddy covariance; Permafrost
来源期刊	Advances in Climate Change Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236456
作者单位	Key Laboratory of Western China's Environmental Systems (Ministry of Education), College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519000, China; Cryosphere Research Station on the Qinghai‒Tibetan Plateau, State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resource, Chinese Academy of Sciences, Lanzhou, 730000, China; University Cooperation of Polar Research, Beijing, 100875, China; Geographical Faculty, Lomonosov Moscow State University, Moscow, 119991, Russian Federation
推荐引用方式 GB/T 7714	Li Z.-L.,Mu C.-C.,Chen X.,等. Changes in net ecosystem exchange of CO2 in Arctic and their relationships with climate change during 2002–2017[J],2021,12(4).
APA	Li Z.-L..,Mu C.-C..,Chen X..,Wang X.-Y..,Dong W.-W..,...&Wu X.-D..(2021).Changes in net ecosystem exchange of CO2 in Arctic and their relationships with climate change during 2002–2017.Advances in Climate Change Research,12(4).
MLA	Li Z.-L.,et al."Changes in net ecosystem exchange of CO2 in Arctic and their relationships with climate change during 2002–2017".Advances in Climate Change Research 12.4(2021).