气候变化领域集成服务门户(CCPortal): Non-Negligible Contribution to Seasonally Thawing Depth of Active Layer From Extreme Warming Events in the Tanggula Permafrost Region of Qinghai-Tibet Plateau

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DOI	10.1029/2021JD035088
	Non-Negligible Contribution to Seasonally Thawing Depth of Active Layer From Extreme Warming Events in the Tanggula Permafrost Region of Qinghai-Tibet Plateau
	Zhu, Xiaofan; Wu, Tonghua; Hu, Guojie; Ni, Jie; Zou, Defu; Chen, Jie; Li, Xiangfei; Wu, Xiaodong; Li, Ren
通讯作者	Wu, TH (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Cryosphere Res Stn Qinghai Tibet Plateau, Lanzhou, Peoples R China. ; Wu, TH (通讯作者)，Southern Marine Sci & Engn Guangdong Lab, Guangzhou, Peoples R China.
发表日期	2021
ISSN	2169-897X
EISSN	2169-8996
卷号	126 期号:17
英文摘要	Despite rising interest in the impacts of long-term gradual climate warming on permafrost changes, little is known about the changes in active-layer thermal conditions after transient and abrupt extreme warming events. Here, we investigated the Tanggula permafrost region of the Qinghai-Tibet Plateau using in situ meteorological and active-layer hydrothermal data. The results showed that the magnitude of variation in the thermal condition of the active layer was positively correlated with the duration and intensity of extreme warming events. The average contribution rate of extreme warming events to seasonally thawing depth was 13.5% +/- 4.9% from April to October, and higher rates occurred in the initial and final stages of the thawing process. The thawing process of the active layer was the main factor controlling the thermal responses of this layer to extreme warming events. Moreover, the interannual differences in active-layer thermal conditions during the thawing period were likely related to the interannual differences in the frequency and intensity of extreme warming events. Plain Language Summary Under the influences of frequent extreme warming events with short duration and high intensity, how much is the impact on seasonally thawing process of active layer? Until now, it remains unclear, and some models related to permafrost exist the knowledge gap in describing the physical mechanism scheme for the impacts. Here, we selected the Tanggula permafrost region of Qinghai-Tibet Plateau, and used in situ meteorological and active layer hydrothermal data to investigate it. Our results showed that the average contribution rates of extreme warming events to thawing depth was 13.5% +/- 4.9% from April to October. Higher contribution rates occurred in the initial and final stages of thawing process. In addition, the active layer thawing process mainly controlled its thermal responses to extreme warming events. Moreover, the inter-annual differences of active layer thermal conditions during thawing period was likely related to the inter-annual differences of extreme warming events in frequency and intensity. These results will contribute to understand the influence mechanism of extreme warming events on the active layer thawing process, which can provide useful references for further improving models from the perspective of extreme events.
关键词	SURFACE-TEMPERATURE SOIL-TEMPERATURE THERMAL REGIME WINTER CLIMATE IMPACTS RAIN TOPOGRAPHY SPELLS COLD
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000694671900012
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253818
作者单位	[Zhu, Xiaofan; Wu, Tonghua; Hu, Guojie; Ni, Jie; Zou, Defu; Chen, Jie; Li, Xiangfei; Wu, Xiaodong; Li, Ren] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Cryosphere Res Stn Qinghai Tibet Plateau, Lanzhou, Peoples R China; [Wu, Tonghua] Southern Marine Sci & Engn Guangdong Lab, Guangzhou, Peoples R China; [Ni, Jie; Li, Xiangfei] Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Xiaofan,Wu, Tonghua,Hu, Guojie,et al. Non-Negligible Contribution to Seasonally Thawing Depth of Active Layer From Extreme Warming Events in the Tanggula Permafrost Region of Qinghai-Tibet Plateau[J]. 中国科学院西北生态环境资源研究院,2021,126(17).
APA	Zhu, Xiaofan.,Wu, Tonghua.,Hu, Guojie.,Ni, Jie.,Zou, Defu.,...&Li, Ren.(2021).Non-Negligible Contribution to Seasonally Thawing Depth of Active Layer From Extreme Warming Events in the Tanggula Permafrost Region of Qinghai-Tibet Plateau.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,126(17).
MLA	Zhu, Xiaofan,et al."Non-Negligible Contribution to Seasonally Thawing Depth of Active Layer From Extreme Warming Events in the Tanggula Permafrost Region of Qinghai-Tibet Plateau".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 126.17(2021).