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DOI	10.1029/2007JD009539
	Recent permafrost warming on the Qinghai-Tibetan plateau
	Wu, Qingbai; Zhang, Tingjun
发表日期	2008
ISSN	2169-897X
EISSN	2169-8996
卷号	113 期号:D13
英文摘要	[1] Permafrost temperature monitoring through 10 boreholes up to 10.7 m depth has been conducted half-monthly from 1996 through 2006 along the Qinghai-Tibetan Highway. The primary results show that the long-term mean annual permafrost temperatures at 6.0 m depth vary from -0.19 degrees C at the Touerjiu Mountains (TM1) site to -3.43 degrees C at Fenghuo Mountain (FH1) site, with an average of about -1.55 degrees C from all 10 sites over the period of their records, indicating permafrost is relatively warm on the Plateau. Mean annual permafrost temperatures at 6.0 m depth have increased 0.12 degrees C to 0.67 degrees C with an average increase of about 0.43 degrees C during the past decade. Over the same period, mean annual air temperatures from four National Weather Service Stations show an increase of about 0.6 degrees C to 1.6 degrees C, generally sufficient to account for the permafrost warming although other factors, such as changes in snow cover and soil moisture conditions, may also play important roles in permafrost warming. Increase in summer rainfall and decrease in winter snowfall may be cooling factors to the underlying soils, offsetting less degree of permafrost warming compared with the magnitude of air temperature increase. Permafrost temperatures at 6.0 m depth increased year-around with most of the increase happened in spring and summer. Winter air temperature has increased 2.9 degrees C to 4.2 degrees C from 1995 through 2005, which may account for significant spring and summer permafrost warming at 6.0 m depth due to three to six month time lag. However, there were no significant trends of air temperature change in other seasons. Further investigation, especially comprehensive monitoring, is needed to better comprehend the physical processes governing the thermal regime of the active layer and permafrost on the Qinghai-Tibetan Plateau.
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS关键词	ACTIVE LAYER ; CLIMATE ; DEGRADATION ; NORTHERN ; HIGHWAY ; ALASKA ; TEMPERATURES ; ECOSYSTEM ; IMPACT ; SLOPE
WOS记录号	WOS:000257740000002
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/240308
作者单位	[Wu, Qingbai] Chinese Acad Sci, State Key Lab Frozen Soil Engn, Cold & Arid Regions Environm & Engn Res Inst, Lanzhou 730000, Gansu, Peoples R China; [Wu, Qingbai; Zhang, Tingjun] Univ Colorado, Natl Snow & Ice Data Ctr, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA; [Zhang, Tingjun] China Meteorol Adm, Chinese Acad Meteorol Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wu, Qingbai,Zhang, Tingjun. Recent permafrost warming on the Qinghai-Tibetan plateau[J]. 中国科学院西北生态环境资源研究院,2008,113(D13).
APA	Wu, Qingbai,&Zhang, Tingjun.(2008).Recent permafrost warming on the Qinghai-Tibetan plateau.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,113(D13).
MLA	Wu, Qingbai,et al."Recent permafrost warming on the Qinghai-Tibetan plateau".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 113.D13(2008).