Responses of alpine grassland on Qinghai-Tibetan plateau to climate warming and permafrost degradation: A modeling perspective (EI)

CORC > 寒区旱区环境与工程研究所 > 中科院寒区旱区环境与工程研究所（未分类） > 期刊论文

	Responses of alpine grassland on Qinghai-Tibetan plateau to climate warming and permafrost degradation: A modeling perspective (EI)
	Yi S. ; Wang X. ; Qin Y. ; Xiang B. ; Ding Y.
刊名	Environmental Research Letters
	2014
卷号	9 期号:7
英文摘要	Permafrost plays a critical role in soil hydrology. Thus, the degradation of permafrost under warming climate conditions may affect the alpine grassland ecosystem on the Qinghai-Tibetan Plateau. Previous space-for-time studies using plot and basin scales have reached contradictory conclusions. In this study, we applied a process-based ecosystem model (DOS-TEM) with a state-of-the-art permafrost hydrology scheme to examine this issue. Our results showed that 1) the DOS-TEM model could properly simulate the responses of soil thermal and hydrological dynamics and of ecosystem dynamics to climate warming and spatial differences in precipitation; 2) the simulated results were consistent with plot-scale studies showing that warming caused an increase in maximum unfrozen thickness, a reduction in vegetation and soil carbon pools as a whole, and decreases in soil water content, net primary production, and heterotrophic respiration; and 3) the simulated results were also consistent with basin-scale studies showing that the ecosystem responses to warming were different in regions with different combinations of water and energy constraints. Permafrost prevents water from draining into water reservoirs. However, the degradation of permafrost in response to warming is a long-term process that also enhances evapotranspiration. Thus, the degradation of the alpine grassland ecosystem on the Qinghai-Tibetan Plateau (releasing carbon) cannot be mainly attributed to the disappearing waterproofing function of permafrost. 2014 IOP Publishing Ltd.
收录类别	EI
语种	英语
公开日期	2015-12-24
内容类型	期刊论文
源URL	[http://ir.casnw.net/handle/362004/25244]
专题	寒区旱区环境与工程研究所_中科院寒区旱区环境与工程研究所（未分类）_期刊论文
推荐引用方式 GB/T 7714	Yi S.,Wang X.,Qin Y.,et al. Responses of alpine grassland on Qinghai-Tibetan plateau to climate warming and permafrost degradation: A modeling perspective (EI)[J]. Environmental Research Letters,2014,9(7).
APA	Yi S.,Wang X.,Qin Y.,Xiang B.,&Ding Y..(2014).Responses of alpine grassland on Qinghai-Tibetan plateau to climate warming and permafrost degradation: A modeling perspective (EI).Environmental Research Letters,9(7).
MLA	Yi S.,et al."Responses of alpine grassland on Qinghai-Tibetan plateau to climate warming and permafrost degradation: A modeling perspective (EI)".Environmental Research Letters 9.7(2014).