Spatiotemporal Variations of Freezing and Thawing Indices During the Past Four Decades in Tibet

doi:10.3389/fevo.2021.750961

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部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

	Spatiotemporal Variations of Freezing and Thawing Indices During the Past Four Decades in Tibet
	Liao, Ying 3,4; Li, Yiying 3,4; Fan, Jihui 4; Galoie, Majid 2; Motamedi, Artemis 1
刊名	FRONTIERS IN ECOLOGY AND EVOLUTION
	2021-09-29
卷号	9 页码:13
关键词	Tibet freezing and thawing indices climate change variation trends permafrost degradation
ISSN号	2296-701X
DOI	10.3389/fevo.2021.750961
英文摘要	Freezing and thawing indices (FI and TI) are commonly used as indicators for climate change assessment and permafrost extent estimation in cold regions. In this study, based on the meteorological daily data (1978-2017) among 34 meteorological stations in Tibet, the temperature in space has been interpolated and FI and TI have been calculated. Finally, spatiotemporal variations have been analyzed and the permafrost area has been estimated. The results showed the mean annual of FI and TI in Tibet are 1241.36 and 1290.22 degrees C.day, respectively. A significant downward trend in freezing index (FI) and an upward trend in thawing index (TI) have been reported in the time series, in against, analyzing the spatial distribution showed there is an increasing trend from southeast to northwest for FI while TI was decreased gradually in the same region in Tibet. This research indicates that altitude has a significant influence on the change of FI and TI. With the increase of altitude, FI decreased and TI increased more significantly. The permafrost area was estimated at about 0.59 x 10(6) km(2) in Tibet.
资助项目	National Natural Science Foundation of China[41871072] ; National Natural Science Foundation of China[41671016] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA20020401]
WOS关键词	TEMPERATURE LAPSE RATES ; ACTIVE-LAYER THICKNESS ; NEAR-SURFACE AIR ; CLIMATE-CHANGE ; PERMAFROST ; PLATEAU ; REGION ; CHINA ; RIVER
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	FRONTIERS MEDIA SA
WOS记录号	WOS:000717164200001
资助机构	National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/56145]
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	Fan, Jihui
作者单位	1.Buein Zahra Tech Univ, Civil Engn Dept, Qazvin, Iran 2.Imam Khomeini Int Univ, Fac Engn & Technol, Civil Engn Dept, Qazvin, Iran 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China 4.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu, Peoples R China
推荐引用方式 GB/T 7714	Liao, Ying,Li, Yiying,Fan, Jihui,et al. Spatiotemporal Variations of Freezing and Thawing Indices During the Past Four Decades in Tibet[J]. FRONTIERS IN ECOLOGY AND EVOLUTION,2021,9:13.
APA	Liao, Ying,Li, Yiying,Fan, Jihui,Galoie, Majid,&Motamedi, Artemis.(2021).Spatiotemporal Variations of Freezing and Thawing Indices During the Past Four Decades in Tibet.FRONTIERS IN ECOLOGY AND EVOLUTION,9,13.
MLA	Liao, Ying,et al."Spatiotemporal Variations of Freezing and Thawing Indices During the Past Four Decades in Tibet".FRONTIERS IN ECOLOGY AND EVOLUTION 9(2021):13.