气候变化领域集成服务门户(CCPortal): Permafrost characteristics and potential influencing factors in the lake regions of Hoh Xil, Qinghai-Tibet Plateau

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DOI	10.1016/j.geoderma.2023.116572
	Permafrost characteristics and potential influencing factors in the lake regions of Hoh Xil, Qinghai-Tibet Plateau
	Zhang, Yuxin; Zhao, Lin; Xie, Changwei; Wu, Tonghua; Wu, Xiaodong; Yang, Guiqian; Yang, Shuhua; Wang, Wu; Pang, Qiangqiang; Liu, Guangyue; Zou, Defu; Hu, Guojie; Wang, Chong; Liu, Shibo
发表日期	2023
ISSN	0016-7061
EISSN	1872-6259
卷号	437
英文摘要	The Qinghai-Tibet Plateau (QTP) is one of the regions in the world where permafrost and lakes are widely developed. Yet, the current understanding of permafrost characteristics surrounding large alpine lakes is still not clear. Based on the observation of permafrost surrounding Zonag Lake and Yanhu Lake (>100 km2) in the Hoh Xil region since 2012, we first investigated the permafrost characteristics and potential influencing factors around large alpine lakes on the QTP. The results indicate that the large alpine lakes have only a marginal thermal effect on the surrounding permafrost. Except for the sites located at the lake bottom and adjacent to the lakeshore, cold permafrost is extensively developed around the lakes, where the mean annual ground temper-ature is below -1.0celcius, and the permafrost thickness is generally more than 40 m. Moreover, significant differ-ences exist in ground temperature between boreholes located in the Yanhu Lake basin and those outside the basin, which the permafrost temperature in the lake basin is remarkably lower. These phenomena are closely related to the high soil water content around lakes. Statistical results show that ground temperature decreases and permafrost thickness increases gradually with increasing soil water content. The latent heat effects play an important role in the thermal dynamics of permafrost, which can buffer the increase of permafrost temperature under climate warming. Meanwhile, the salinity of water can weaken the thermal erosion effect of the lake on the surrounding permafrost to a certain extent. Overall, the permafrost thermal regime in the lake regions is not only controlled by altitude but also affected by soil water content. This study will provide us with a basis for un-derstanding the state and characteristics of the frozen ground around lakes in the permafrost regions of the QTP, as well as for conducting research on the interaction of frozen ground with lakes and even the atmosphere.
关键词	Permafrost characteristics Influencing factors Soil water content Lake regions Hoh Xil Qinghai-Tibet Plateau
英文关键词	WESTERN ARCTIC COAST; THERMOKARST LAKE; THERMAL REGIME; BEILUHE BASIN; ACTIVE LAYER; HUDSON-BAY; EXPANSION; STATE; HEAT; THAW
WOS研究方向	Soil Science
WOS记录号	WOS:001032640200001
来源期刊	GEODERMA
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282627
作者单位	Nanjing University of Information Science & Technology; Chinese Academy of Sciences; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Nanjing Xiaozhuang University
推荐引用方式 GB/T 7714	Zhang, Yuxin,Zhao, Lin,Xie, Changwei,et al. Permafrost characteristics and potential influencing factors in the lake regions of Hoh Xil, Qinghai-Tibet Plateau[J],2023,437.
APA	Zhang, Yuxin.,Zhao, Lin.,Xie, Changwei.,Wu, Tonghua.,Wu, Xiaodong.,...&Liu, Shibo.(2023).Permafrost characteristics and potential influencing factors in the lake regions of Hoh Xil, Qinghai-Tibet Plateau.GEODERMA,437.
MLA	Zhang, Yuxin,et al."Permafrost characteristics and potential influencing factors in the lake regions of Hoh Xil, Qinghai-Tibet Plateau".GEODERMA 437(2023).