气候变化领域集成服务门户(CCPortal): Qinghai-Tibet Plateau wetting reduces permafrost thermal responses to climate warming

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DOI	10.1016/j.epsl.2021.116858
	Qinghai-Tibet Plateau wetting reduces permafrost thermal responses to climate warming
	Zhang G.; Nan Z.; Zhao L.; Liang Y.; Cheng G.
发表日期	2021
ISSN	0012821X
卷号	562
英文摘要	Permafrost, as one of the cryospheric indicators, is extremely sensitive to climatic changes. The Qinghai-Tibet Plateau has experienced remarkable warming and wetting since the mid-1990s. Its recent wetting alters thermal and hydrological properties in permafrost regions and inevitably affects permafrost thermal dynamics. While previous studies mostly focused on the effects of warming on permafrost, little attention has been paid to the effects of concomitant wetting. Here, a land surface model adapted for permafrost simulation is employed to quantitatively investigate the impacts of climate warming and wetting on permafrost thermal regimes by setting up a group of hypothetical numerical scenarios on the basis of historical meteorological records. The results reveal that climate wetting reduces permafrost thermal responses to warming and this effect is especially evident in the arid and semi-arid zones. It was estimated that one-degree warming induces an average increase of 0.46 m in active layer thickness (ATL) and 0.53 °C in temperature at the top of permafrost (TTOP), and a 100 mm wetting in summer precipitation leads to a mean decrease of 0.35 m in ALT and 0.36 °C in TTOP. Furthermore, we found through the simulations that increased summer precipitation imposes dual effects on permafrost in semi-arid high altitudes. © 2021 The Author(s)
关键词	climate wetting numerical modeling permafrost Qinghai-Tibet Plateau thermal regime
英文关键词	Arid regions; Climate models; Numerical models; Permafrost; Climate warming; Climate wetting; Climatic changes; Hydrological properties; Permafrost region; Qinghai Tibet plateau; Summer precipitation; Thermal; Thermal regimes; Thermal response; Wetting; climate effect; climate modeling; global warming; historical record; numerical model; permafrost; thermal regime; wetting; China; Qinghai-Xizang Plateau
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203369
作者单位	Key Laboratory of Ministry of Education on Virtual Geographic Environment, Nanjing Normal University, Nanjing, 210023, China; Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, 210023, China; School of Geographical Sciences, Nanjing University of Information Science & Technology, Nanjing, 210044, China; Northwest Institute of Eco-Environment and Resources, Chinese Academy of Science, Lanzhou, 730000, China
推荐引用方式 GB/T 7714	Zhang G.,Nan Z.,Zhao L.,et al. Qinghai-Tibet Plateau wetting reduces permafrost thermal responses to climate warming[J],2021,562.
APA	Zhang G.,Nan Z.,Zhao L.,Liang Y.,&Cheng G..(2021).Qinghai-Tibet Plateau wetting reduces permafrost thermal responses to climate warming.Earth and Planetary Science Letters,562.
MLA	Zhang G.,et al."Qinghai-Tibet Plateau wetting reduces permafrost thermal responses to climate warming".Earth and Planetary Science Letters 562(2021).