气候变化领域集成服务门户(CCPortal): Large-scale characteristics of thermokarst lakes across the source area of the Yellow River on the Qinghai-Tibetan Plateau

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DOI	10.1007/s11629-022-7693-y
	Large-scale characteristics of thermokarst lakes across the source area of the Yellow River on the Qinghai-Tibetan Plateau
	Liu, Wen-hui; Zhou, Guang-hao; Liu, Hai-rui; Li, Qing-peng; Xie, Chang-wei; Li, Qing; Zhao, Jian-yun; Zhang, Qi
发表日期	2023
ISSN	1672-6316
EISSN	1993-0321
起始页码	1589
结束页码	1604
卷号	20 期号:6
英文摘要	As significant evidence of permafrost degradation, thermokarst lakes play an important role in the permafrost regions by regulating hydrology, ecology, and biogeochemistry. In the Sources Area of the Yellow River (SAYR), permafrost degradation has accelerated since the 1980s, and numerous thermokarst lakes have been discovered. In this paper, we use Sentinel-2 images to extract thermokarst lake boundaries and perform a regional-scale study on their geometry across the permafrost region in the SAYR. We also explored the spatiotemporal variations and potential drivers from the perspectives of the permafrost, climate, terrain and vegetation conditions. The results showed that there were 47,518 thermokarst lakes in 2021 with a total area of 190.22x10(6) m(2), with an average size of 4,003.3 m(2). The 44,928 ponds (& LE;10,000 m(2)) predominated the whole lake number (94.1%) but contributed to a small portion of the total lake area (28.8%). With 2,590 features (5.9%), small-sized (10,000 to 100,000 m(2)) and large-sized lakes (>100,000 m(2)) constituted up to 71.2% of the total lake area. Thermokarst lakes developed more significantly in warm permafrost regions than in cold permafrost areas; 74.1% of lakes with a total area of 119.6x10(6) m(2) (62.9%), were distributed in warm permafrost regions. Most thermokarst lakes were likely to develop within the elevation range of 4,500 & SIM;4,800 m, on flat terrain (slope<10 & DEG;), on SE and S aspects and in alpine meadow areas. The thermokarst lakes in the study region experienced significant shrinkage between 1990 and 2021, characterized by obvious lake drainage; the lake numbers decreased by 5418 (56.1%), with a decreasing area of 58.63x1o(6) m(2) (49.0%). This shrinkage of the thermokarst lake area was attributable mainly to the intensified degradation of rich-ice permafrost thawing arising from continued climate warming, despite the wetting climatic trend.
关键词	Thermokarst lake Spatial characteristic Influencing factor Source area of the Yellow River
英文关键词	BEILUHE BASIN; PERMAFROST; PONDS; REGIME
WOS研究方向	Environmental Sciences
WOS记录号	WOS:001022498700007
来源期刊	JOURNAL OF MOUNTAIN SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283814
作者单位	Qinghai University; Qinghai University; Qinghai University; Chinese Academy of Sciences
推荐引用方式 GB/T 7714	Liu, Wen-hui,Zhou, Guang-hao,Liu, Hai-rui,et al. Large-scale characteristics of thermokarst lakes across the source area of the Yellow River on the Qinghai-Tibetan Plateau[J],2023,20(6).
APA	Liu, Wen-hui.,Zhou, Guang-hao.,Liu, Hai-rui.,Li, Qing-peng.,Xie, Chang-wei.,...&Zhang, Qi.(2023).Large-scale characteristics of thermokarst lakes across the source area of the Yellow River on the Qinghai-Tibetan Plateau.JOURNAL OF MOUNTAIN SCIENCE,20(6).
MLA	Liu, Wen-hui,et al."Large-scale characteristics of thermokarst lakes across the source area of the Yellow River on the Qinghai-Tibetan Plateau".JOURNAL OF MOUNTAIN SCIENCE 20.6(2023).