Global warming accelerates the upfreezing of permafrost in arid middle   Tianshan Mountains

doi:10.1007/s11434-013-5891-2

CORC > 北京大学 > 城市与环境学院

	Global warming accelerates the upfreezing of permafrost in arid middle Tianshan Mountains
	Li ChuanChuan ; Chen YiXin ; Nie ZhenYu ; Cui ZhiJiu ; Liu GengNian
刊名	科学通报英文版
	2013
关键词	Tianshan Mountains sorted circle upfreezing climate change FROST HEAVE FIELD-MEASUREMENTS VARIABILITY IMPACTS CHINA
DOI	10.1007/s11434-013-5891-2
英文摘要	Upfreezing is an important geomorphic process in the periglacial environment. It is a product of cold climate and thus an important part of the cryospheric processes. Based on the long-term positioning observations in the source area of the Urumqi River, this article represents an in-depth discussion of the characteristics of sorted circles and upfreezing mechanisms in the Tianshan Mountains. In the source area of the Urumqi River, the intensity of upfreezing is the highest within the top 25 cm near the surface, while targets with a diameter of 3 cm are least affected by upfreezing. There is no distinct difference between the centre with fine grains and the margin with coarse debris within the same sorted circle in terms of the intensity of upfreezing. The correlation analysis demonstrates that temperature plays an important role in upfreezing and the development of sorted circles. A long-time positioning observation of sorted circles reveals that periglacial landforms are sensitive to regional climate change and respond quickly to the temperature increase of the recent two decades. Enhanced upfreezing was found to be due to increased soil moisture content.; Multidisciplinary Sciences; SCI(E); 2; ARTICLE; 31; 3806-3814; 58
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/160980]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Li ChuanChuan,Chen YiXin,Nie ZhenYu,et al. Global warming accelerates the upfreezing of permafrost in arid middle Tianshan Mountains[J]. 科学通报英文版,2013.
APA	Li ChuanChuan,Chen YiXin,Nie ZhenYu,Cui ZhiJiu,&Liu GengNian.(2013).Global warming accelerates the upfreezing of permafrost in arid middle Tianshan Mountains.科学通报英文版.
MLA	Li ChuanChuan,et al."Global warming accelerates the upfreezing of permafrost in arid middle Tianshan Mountains".科学通报英文版 (2013).