气候变化领域集成服务门户(CCPortal): Changes in frozen ground in the Source Area of the Yellow River on the Qinghai-Tibet Plateau, China, and their eco-environmental impacts

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DOI	10.1088/1748-9326/4/4/045206
	Changes in frozen ground in the Source Area of the Yellow River on the Qinghai-Tibet Plateau, China, and their eco-environmental impacts
	Jin, Huijun; He, Ruixia; Cheng, Guodong; Wu, Qingbai; Wang, Shaoling; Lue, Lanzhi; Chang, Xiaoli
发表日期	2009
ISSN	1748-9326
卷号	4 期号:4
英文摘要	The Source Area of the Yellow River is located in the mosaic transition zones of seasonally frozen ground, and discontinuous and continuous permafrost on the northeastern Qinghai-Tibet Plateau. Vertically, permafrost is attached or detached from frost action. The latter can be further divided into shallow (depth to the permafrost table <= 8 m), deep (>8 m) and two-layer permafrost. Since the 1980s, air temperatures have been rising at an average rate of 0.02 degrees C yr(-1). Human activities have also increased remarkably, resulting in a regional degradation of permafrost. The lower limit of permafrost has risen by 50-80 m. The average maximum depth of frost penetration has decreased by 0.1-0.2 m. The temperatures of the suprapermafrost water have increased by 0.5-0.7 degrees C. General trends of permafrost degradation include reduction in areal extent from continuous and discontinuous to sporadic and patchy permafrost, thinning of permafrost, and expansion of taliks. Isolated patches of permafrost have either been significantly reduced in areal extent, or changed into seasonally frozen ground. Degradation of permafrost has led to a lowering of ground water levels, shrinking lakes and wetlands, and noticeable change of grassland ecosystems alpine meadows to steppes. The degradation of alpine grasslands will cause further degradation of permafrost and result in the deterioration of ecological environments as manifested by expanding desertification and enhancing soil erosion.
英文关键词	Source Area of the Yellow River (SAYR); frozen ground; cold regions ecology; degradation; environmental impacts
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS关键词	PERMAFROST ; MOUNTAINS ; DEGRADATION
WOS记录号	WOS:000272900500063
来源期刊	ENVIRONMENTAL RESEARCH LETTERS
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/240227
作者单位	[Jin, Huijun; He, Ruixia; Cheng, Guodong; Wu, Qingbai; Wang, Shaoling; Lue, Lanzhi; Chang, Xiaoli] Chinese Acad Sci, State Key Lab Frozen Soils Engn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Jin, Huijun,He, Ruixia,Cheng, Guodong,et al. Changes in frozen ground in the Source Area of the Yellow River on the Qinghai-Tibet Plateau, China, and their eco-environmental impacts[J]. 中国科学院西北生态环境资源研究院,2009,4(4).
APA	Jin, Huijun.,He, Ruixia.,Cheng, Guodong.,Wu, Qingbai.,Wang, Shaoling.,...&Chang, Xiaoli.(2009).Changes in frozen ground in the Source Area of the Yellow River on the Qinghai-Tibet Plateau, China, and their eco-environmental impacts.ENVIRONMENTAL RESEARCH LETTERS,4(4).
MLA	Jin, Huijun,et al."Changes in frozen ground in the Source Area of the Yellow River on the Qinghai-Tibet Plateau, China, and their eco-environmental impacts".ENVIRONMENTAL RESEARCH LETTERS 4.4(2009).