气候变化领域集成服务门户(CCPortal): Ground ice at depths in the Tianshuihai Lake basin on the western Qinghai -Tibet Plateau: An indication of permafrost evolution

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DOI	10.1016/j.scitotenv.2020.138966
	Ground ice at depths in the Tianshuihai Lake basin on the western Qinghai -Tibet Plateau: An indication of permafrost evolution
	Yang, Yuzhong; Wu, Qingbai; Jiang, Guanli; Zhang, Peng
发表日期	2020
ISSN	0048-9697
EISSN	1879-1026
卷号	729
英文摘要	The stable-isotope data of ground ice from a deep borehole (similar to 46 m) at the Tianshuihai (TSH) lake basin on the northwestern Qinghai-Tibet Plateau (QTP) are presented together with cryolithological information. Remarkable variations in the stable isotope composition of ground ice at depths allow a division of five clearly delineated stages. The remarkable deviations in stable isotopes of ground ice during each stage underline different initial source water and formation processes, indicating considerable fluctuations in paleo-lake conditions and multiple patterns of climatic-induced permafrost evolutions. In combination with the ground ice isotopes for two deep boreholes on the interior QTP, the position of the present permafrost table is found at 2-3 m. Two possible positions of paleo-permafrost tables at depths of 7-8 and 15-16 m are identified based on the ice isotopic composition of wellbores in combination with those from the other two deep boreholes on the interior QTP. The high uniformity in stable isotopic composition of ground ice below the depth of 16 m may have reflected the consistent regional climate transitions and the resultant permafrost evolution on the QTP. This study provides some new insights on the ground ice as an indicator for permafrost evolution on the QTP.
英文关键词	Ground ice; Permafrost evolution; Stable isotopes; Permafrost table; Qinghai-Tibet Plateau
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS关键词	DEGRADATION ; SEDIMENTS ; CLIMATE ; CHINA ; PRECIPITATION ; ISOTOPES ; CRATER ; OXYGEN
WOS记录号	WOS:000541380100002
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
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/240186
作者单位	[Yang, Yuzhong; Wu, Qingbai; Jiang, Guanli; Zhang, Peng] Chinese Acad Sci, State Key Lab Frozen Soil Engn, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Yang, Yuzhong,Wu, Qingbai,Jiang, Guanli,et al. Ground ice at depths in the Tianshuihai Lake basin on the western Qinghai -Tibet Plateau: An indication of permafrost evolution[J]. 中国科学院西北生态环境资源研究院,2020,729.
APA	Yang, Yuzhong,Wu, Qingbai,Jiang, Guanli,&Zhang, Peng.(2020).Ground ice at depths in the Tianshuihai Lake basin on the western Qinghai -Tibet Plateau: An indication of permafrost evolution.SCIENCE OF THE TOTAL ENVIRONMENT,729.
MLA	Yang, Yuzhong,et al."Ground ice at depths in the Tianshuihai Lake basin on the western Qinghai -Tibet Plateau: An indication of permafrost evolution".SCIENCE OF THE TOTAL ENVIRONMENT 729(2020).