气候变化领域集成服务门户(CCPortal): Influence of microtopography on active layer thaw depths in Qilian Mountain, northeastern Tibetan Plateau

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DOI	10.1007/s12665-015-5196-7
	Influence of microtopography on active layer thaw depths in Qilian Mountain, northeastern Tibetan Plateau
	Gao, Tanguang; Zhang, Tingjun; Wan, Xudong; Kang, Shichang; Sillanpaa, Mika; Zheng, Yanmei; Cao, Lin
发表日期	2016
ISSN	1866-6280
EISSN	1866-6299
卷号	75 期号:5
英文摘要	Climate warming over the Tibetan Plateau has been thickening the active layer, the most significant indicator of the permafrost system. This study evaluates the influence of microtopography on active layer thaw depth in recent years at Eboling basin of the eastern Qilian Mountain, northeastern Tibetan Plateau. Thaw depths were measured at microtopographic levels in 2012, 2013, and 2014, respectively. Watershed-scale sampling was used to estimate the influence of various morphologies on the active layer, while a second sampling scheme to examine the variations in the frost table height along six short transects. A third sampling scheme used spatial auto-correlation analysis in a regular grid at 10 x 10 m intervals. The results documented that microtopography (elevation, microrelief, surface configuration, and slope) played a pivotal role on the active layer thickness of mountainous permafrost in the study area. Active layer became thinner in depressions, which was contrary to most of Arctic sites. Spatial autocorrelation analysis elucidated that the dominant topographic factors controlled the changes of active layer thickness. These factors exerted the majority of control over the spatial variations of the active layer. The results can help researchers or engineers to roughly estimate the probable influence of micromorphology on the changes in thickness of the active layer in mountainous permafrost regions in the Tibetan Plateau.
关键词	Active layer thickness Mountain permafrost Microtopography Tibetan plateau
学科领域	Environmental Sciences & Ecology; Geology; Water Resources
语种	英语
WOS研究方向	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
来源期刊	ENVIRONMENTAL EARTH SCIENCES
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/111853
作者单位	Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Gao, Tanguang,Zhang, Tingjun,Wan, Xudong,et al. Influence of microtopography on active layer thaw depths in Qilian Mountain, northeastern Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2016,75(5).
APA	Gao, Tanguang.,Zhang, Tingjun.,Wan, Xudong.,Kang, Shichang.,Sillanpaa, Mika.,...&Cao, Lin.(2016).Influence of microtopography on active layer thaw depths in Qilian Mountain, northeastern Tibetan Plateau.ENVIRONMENTAL EARTH SCIENCES,75(5).
MLA	Gao, Tanguang,et al."Influence of microtopography on active layer thaw depths in Qilian Mountain, northeastern Tibetan Plateau".ENVIRONMENTAL EARTH SCIENCES 75.5(2016).