气候变化领域集成服务门户(CCPortal): Active Layer Thickness Variation on the Qinghai-Tibetan Plateau: Historical and Projected Trends

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DOI	10.1029/2021JD034841
	Active Layer Thickness Variation on the Qinghai-Tibetan Plateau: Historical and Projected Trends
	Xu, Xiaoming; Wu, Qingbai
通讯作者	Wu, QB (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou, Peoples R China. ; Wu, QB (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Beiluhe Observat Stn Frozen Soil Environm & Engn, Lanzhou, Peoples R China.
发表日期	2021
ISSN	2169-897X
EISSN	2169-8996
卷号	126 期号:23
英文摘要	As the buffer layer between the atmosphere and permafrost, the active layer is vulnerable to climate change. The variation in the active layer thickness (ALT) has important effects on surface energy balance, ecosystem, hydrological cycle, vegetation cover, and engineering construction in permafrost regions. The goal of this study is to discuss the active layer variation under different shared socioeconomic pathways (SSPs) for specific warming levels and to reveal the potential interactions between the ALT and the associated driving factors in typical hydrological basins. We revised the Stefan solution using the edaphic factor and the thawing index calculated by multimodel data from the Coupled Model Intercomparison Project Phase 6 to estimate the variation in the ALT. During 2015 to 2100, the ALT will increase by 14 cm (SSP1-2.6), 43 cm (SSP2-4.5), and 1.44 m (SSP5-8.5), with average increase rates of 2.5 cm/decade, 5.8 cm/decade, and 17.5 cm/decade, respectively. The rates of increase of the ALT in the Hexi basin, Inner basin, Mekong basin, Yangtze basin, and Yellow basin are 12.6 cm/decade, 6.7 cm/decade, 5.2 cm/decade, 8.0 cm/decade, and 5 cm/decade, respectively. These results illustrate that air temperature is the primary determinant of ALT variation and normalized difference vegetation index (NDVI) and snow depth may influence the ALT change. The most significant correlations are between the ALT and NDVI in the Yangtze basin. In different seasons, the spring snow depth has the greatest impact on the ALT in the Hexi basin.
关键词	SNOW WATER EQUIVALENT CLIMATE-CHANGE PERMAFROST DISTRIBUTION NORTHERN-HEMISPHERE WARMING PERMAFROST DEPTH DEGRADATION SIMULATION PREDICTION RESPONSES
英文关键词	active layer thickness; Qinghai-Tibetan Plateau; hydrological basins; air temperature; NDVI; snow depth
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000729996000007
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/253602
作者单位	[Xu, Xiaoming; Wu, Qingbai] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou, Peoples R China; [Xu, Xiaoming; Wu, Qingbai] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Beiluhe Observat Stn Frozen Soil Environm & Engn, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Xu, Xiaoming,Wu, Qingbai. Active Layer Thickness Variation on the Qinghai-Tibetan Plateau: Historical and Projected Trends[J]. 中国科学院西北生态环境资源研究院,2021,126(23).
APA	Xu, Xiaoming,&Wu, Qingbai.(2021).Active Layer Thickness Variation on the Qinghai-Tibetan Plateau: Historical and Projected Trends.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,126(23).
MLA	Xu, Xiaoming,et al."Active Layer Thickness Variation on the Qinghai-Tibetan Plateau: Historical and Projected Trends".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 126.23(2021).