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Plant uptake of CO2 outpaces losses from permafrost and plant respiration on the Tibetan Plateau

文献类型：期刊论文

作者Wei, Da6; Qi, Yahui5,6; Ma, Yaoming4,5; Wang, Xufeng3; Ma, Weiqiang4; Gao, Tanguang2; Huang, Lin1; Zhao, Hui6; Zhang, Jianxin5,6; Wang, Xiaodan6
刊名PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
出版日期2021-08-17
卷号118期号:33页码:9
ISSN号0027-8424
关键词permafrost carbon climate change eddy covariance Tibetan Plateau
DOI10.1073/pnas.2015283118
英文摘要High-latitude and high-altitude regions contain vast stores of permafrost carbon. Climate warming may result in the release of CO2 from both the thawing of permafrost and accelerated autotrophic respiration, but it may also increase the fixation of CO2 by plants, which could relieve or even offset the CO2 losses. The Tibetan Plateau contains the largest area of alpine permafrost on Earth. However, the current status of the net CO2 balance and feedbacks to warming remain unclear, given that the region has recently experienced an atmospheric warming rate of over 0.3 degrees C decade(-1). We examined 32 eddy covariance sites and found an unexpected net CO2 sink during 2002 to 2020 (26 of the sites yielded a net CO2 sink) that was four times the amount previously estimated. The CO2 sink peaked at an altitude of roughly 4,000 m, with the sink at lower and higher altitudes limited by a low carbon use efficiency and a cold, dry climate, respectively. The fixation of CO2 in summer is more dependent on temperature than the loss of CO2 than it is in the winter months, especially at higher altitudes. Consistently, 16 manipulative experiments and 18 model simulations showed that the fixation of CO2 by plants will outpace the loss of CO2 under a wetting-warming climate until the 2090s (178 to 318 Tg C y(-1)). We therefore suggest that there is a plant-dominated negative feedback to climate warming on the Tibetan Plateau.
WOS关键词CARBON BALANCE ; INTERANNUAL VARIATIONS ; MODEL SIMULATIONS ; CLIMATE-CHANGE ; ECOSYSTEMS ; SENSITIVITY ; DYNAMICS ; FLUXES ; DECOMPOSITION ; ACCUMULATION
资助项目Strategic Priority Research Program of the Chinese Academy of Sciences[XDA20020401] ; Second Tibetan Plateau Scientific Exploration[2019QZKK0404] ; National Natural Science Foundation of China[41971145] ; National Natural Science Foundation of China[41671102] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2020369] ; NASA's Terrestrial Ecology Program[NNX11AO08A] ; NASA's Terrestrial Ecology Program[NNH10AN68I]
WOS研究方向Science & Technology - Other Topics
语种英语
出版者NATL ACAD SCIENCES
WOS记录号WOS:000687403700021
资助机构Strategic Priority Research Program of the Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Exploration ; National Natural Science Foundation of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; NASA's Terrestrial Ecology Program
源URL[http://ir.imde.ac.cn/handle/131551/56252]  
专题成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者Wang, Xiaodan
作者单位1.Chinese Acad Sci, Inst Geophys Sci & Nat Resource Res, Beijing 100101, Peoples R China
2.Lanzhou Univ, Coll Earth & Environm Sci, Lanzhou 730000, Peoples R China
3.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China
4.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China
5.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
6.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
推荐引用方式
GB/T 7714		 Wei, Da,Qi, Yahui,Ma, Yaoming,et al. Plant uptake of CO2 outpaces losses from permafrost and plant respiration on the Tibetan Plateau[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2021,118(33):9.
APA Wei, Da.,Qi, Yahui.,Ma, Yaoming.,Wang, Xufeng.,Ma, Weiqiang.,...&Wang, Xiaodan.(2021).Plant uptake of CO2 outpaces losses from permafrost and plant respiration on the Tibetan Plateau.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,118(33),9.
MLA Wei, Da,et al."Plant uptake of CO2 outpaces losses from permafrost and plant respiration on the Tibetan Plateau".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 118.33(2021):9.

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来源：成都山地灾害与环境研究所

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