气候变化领域集成服务门户(CCPortal): Variation characteristics of frozen ground degradation in the Qinghai-Tibet Plateau observed using time series data of MODIS from 2000 to 2020

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DOI	10.1007/s00704-022-04344-6
	Variation characteristics of frozen ground degradation in the Qinghai-Tibet Plateau observed using time series data of MODIS from 2000 to 2020
	Wen, Bo; Zhang, Tingbin; Zhou, Xiaobing; Yi, Guihua; Li, Jingji; Bie, Xiaojuan; Chen, Yang
发表日期	2023
ISSN	0177-798X
EISSN	1434-4483
起始页码	1673
结束页码	1686
卷号	151 期号:3-4
英文摘要	As an important component of the cryosphere, the frozen ground is sensitive to climate change. With global warming, frozen ground in most regions of the Qinghai-Tibet Plateau (QTP) is degrading. The Stefan model and the temperature at the top of the permafrost (TTOP) model were adopted to estimate the spatial distribution of frozen ground and maximum soil freezing depth (SFD) based on multiple datasets across the QTP from 2000 to 2020. Results were then evaluated. The objective of this study is to investigate the spatiotemporal patterns of the frozen ground in the QTP in the past 20 years. In the QTP, permafrost mainly distributes in the central and the western regions, covering an area of about 9.69 x 10(5) km(2) and accounting for 39.5% of the total area of QTP. The mean area of seasonally frozen ground was similar to 1.39 x 10(6) km(2), and the mean SFD was similar to 1.28 m. The SFD showed a spatial distribution pattern of being deep in the west and north and shallow in the east and south. In the past 2 decades, permafrost areas in the QTP decreased by about 8.52 x 10(4) km(2). The regions with permafrost disappearing were mainly located in the transition areas from permafrost to seasonally frozen ground. There was an obvious disappearance of permafrost in the Qilian Mountains, the source region of the Yangtze River, and the source region of the Yellow River. The SFD decreased at about 60.82% of the QTP, and the annual average decreasing rate was - 4.3 cmmiddot(10a)(-1). Regions with a significant decrease in the SFD were mainly located at the center of the Qaidam Basin in the northern regions and the Western Sichuan Plateau and the Hengduan Mountains in the southwest regions, and their decreasing rate was about - 12 similar to - 5 cmmiddot(10a)(-1).
英文关键词	ACTIVE-LAYER THICKNESS; CLIMATE-CHANGE; PERMAFROST DISTRIBUTION; THERMAL REGIME; LAND-SURFACE; HEIHE RIVER; THAW DEPTH; VEGETATION; AREA; MODEL
WOS研究方向	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000907856700003
来源期刊	THEORETICAL AND APPLIED CLIMATOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283342
作者单位	Chengdu University of Technology; Chengdu University of Technology; University of Montana System; University of Montana; Chengdu University of Technology; Chengdu University of Technology
推荐引用方式 GB/T 7714	Wen, Bo,Zhang, Tingbin,Zhou, Xiaobing,et al. Variation characteristics of frozen ground degradation in the Qinghai-Tibet Plateau observed using time series data of MODIS from 2000 to 2020[J],2023,151(3-4).
APA	Wen, Bo.,Zhang, Tingbin.,Zhou, Xiaobing.,Yi, Guihua.,Li, Jingji.,...&Chen, Yang.(2023).Variation characteristics of frozen ground degradation in the Qinghai-Tibet Plateau observed using time series data of MODIS from 2000 to 2020.THEORETICAL AND APPLIED CLIMATOLOGY,151(3-4).
MLA	Wen, Bo,et al."Variation characteristics of frozen ground degradation in the Qinghai-Tibet Plateau observed using time series data of MODIS from 2000 to 2020".THEORETICAL AND APPLIED CLIMATOLOGY 151.3-4(2023).