干旱区生态环境知识资源中心(Arid): Permafrost warming near the northern limit of permafrost on the Qinghai-Tibetan Plateau during the period from 2005 to 2017: A case study in the Xidatan area

Arid

DOI	10.1002/ppp.2089
	Permafrost warming near the northern limit of permafrost on the Qinghai-Tibetan Plateau during the period from 2005 to 2017: A case study in the Xidatan area
	Liu, Guangyue; Xie, Changwei; Zhao, Lin; Xiao, Yao; Wu, Tonghua; Wang, Wu; Liu, Wenhui
通讯作者	Xie, CW
来源期刊	PERMAFROST AND PERIGLACIAL PROCESSES
ISSN	1045-6740
EISSN	1099-1530
英文摘要	Permafrost that exists near the boundary of the permafrost zone is generally more sensitive to climate change. By analyzing ground temperatures observed from two 30-m-deep boreholes, a case study was conducted to present some characteristics of recent permafrost warming in the Xidatan area, near the northern limit of the permafrost zone on the Qinghai-Tibetan Plateau. The rate of permafrost degradation from top to bottom in the area was far less than that from bottom to top. Local conditions produced spatial differences in permafrost characteristics, and thus the site covered by alpine meadow had a thinner active layer and lower rate of change than the site with desert steppe. With permafrost warming, the depths of zero annual amplitude at the two sites showed significant decreasing trends, suggesting that the warming could change the proportion of unfrozen water and ice in permafrost, and then lead to a decrease in the mean thermal diffusivity of formation. Mean annual permafrost temperatures at depth of zero annual amplitude of the two boreholes were respectively 0.4 and -0.7 degrees C, indicating that high-temperature permafrost is widely distributed in the study area. The lower temperature permafrost had a higher warming rate and a higher upward shift rate of the permafrost base. The pattern of permafrost degradation near the limit of permafrost was characterized by nonuniform speed and staged development.
英文关键词	active layer depth of zero annual amplitude permafrost permafrost degradation permafrost warming Qinghai– Tibetan plateau
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000589945700001
WOS关键词	DEGRADATION ; CLIMATE ; RESPONSES
WOS类目	Geography, Physical ; Geology
WOS研究方向	Physical Geography ; Geology
来源机构	南京信息工程大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/328492
作者单位	[Liu, Guangyue; Xie, Changwei; Xiao, Yao; Wu, Tonghua; Wang, Wu] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Cryosphere Res Stn Qinghai Xizang Plateau, Lanzhou 730000, Peoples R China; [Liu, Guangyue; Zhao, Lin] Univ Chinese Acad Sci, Beijing, Peoples R China; [Zhao, Lin] Nanjing Univ Informat Sci & Technol, Sch Geog Sci, Nanjing, Peoples R China; [Liu, Wenhui] Qinghai Univ, Dept Geol Engn, Xining, Peoples R China
推荐引用方式 GB/T 7714	Liu, Guangyue,Xie, Changwei,Zhao, Lin,et al. Permafrost warming near the northern limit of permafrost on the Qinghai-Tibetan Plateau during the period from 2005 to 2017: A case study in the Xidatan area[J]. 南京信息工程大学.
APA	Liu, Guangyue.,Xie, Changwei.,Zhao, Lin.,Xiao, Yao.,Wu, Tonghua.,...&Liu, Wenhui.
MLA	Liu, Guangyue,et al."Permafrost warming near the northern limit of permafrost on the Qinghai-Tibetan Plateau during the period from 2005 to 2017: A case study in the Xidatan area".PERMAFROST AND PERIGLACIAL PROCESSES