Response of a Grassland Ecosystem to Climate Change in a Theoretical Model

doi:10.1007/s00376-011-0169-6

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	Response of a Grassland Ecosystem to Climate Change in a Theoretical Model
	Sun Guodong 1; Mu Mu 1,2
刊名	ADVANCES IN ATMOSPHERIC SCIENCES
	2011-11-01
卷号	28 期号:6 页码:1266-1278
关键词	Conditional Nonlinear Optimal Perturbation Parameter Perturbation Cnop-p Grassland Ecosystem Climate Change
ISSN号	0256-1530
DOI	10.1007/s00376-011-0169-6
文献子类	Article
英文摘要	The response of a grassland ecosystem to climate change is discussed within the context of a theoretical model. An optimization approach, a conditional nonlinear optimal perturbation related to parameter (CNOP-P) approach, was employed in this study. The CNOP-P, a perturbation of moisture index in the theoretical model, represents a nonlinear climate perturbation. Two kinds of linear climate perturbations were also used to study the response of the grassland ecosystem to different types of climate changes.; The response of a grassland ecosystem to climate change is discussed within the context of a theoretical model. An optimization approach, a conditional nonlinear optimal perturbation related to parameter (CNOP-P) approach, was employed in this study. The CNOP-P, a perturbation of moisture index in the theoretical model, represents a nonlinear climate perturbation. Two kinds of linear climate perturbations were also used to study the response of the grassland ecosystem to different types of climate changes. The results show that the extent of grassland ecosystem variation caused by the CNOP-P-type climate change is greater than that caused by the two linear types of climate change. In addition, the grassland ecosystem affected by the CNOP-P-type climate change evolved into a desert ecosystem, and the two linear types of climate changes failed within a specific amplitude range when the moisture index recovered to its reference state. Therefore, the grassland ecosystem response to climate change was nonlinear. This study yielded similar results for a desert ecosystem seeded with both living and wilted biomass litter. The quantitative analysis performed in this study also accounted for the role of soil moisture in the root zone and the shading effect of wilted biomass on the grassland ecosystem through nonlinear interactions between soil and vegetation. The results of this study imply that the CNOP-P approach is a potentially effective tool for assessing the impact of nonlinear climate change on grassland ecosystems.
学科主题	Meteorology & Atmospheric Sciences
URL标识	查看原文
语种	英语
WOS记录号	WOS:000296208600004
公开日期	2012-07-03
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/11602]
专题	海洋研究所_海洋环流与波动重点实验室
作者单位	1.Chinese Acad Sci, State Key Lab Numer Modeling Atmospher Sci & Geop, Inst Atmospher Phys, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Key Lab Ocean Circulat & Wave, Inst Oceanol, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Sun Guodong,Mu Mu. Response of a Grassland Ecosystem to Climate Change in a Theoretical Model[J]. ADVANCES IN ATMOSPHERIC SCIENCES,2011,28(6):1266-1278.
APA	Sun Guodong,&Mu Mu.(2011).Response of a Grassland Ecosystem to Climate Change in a Theoretical Model.ADVANCES IN ATMOSPHERIC SCIENCES,28(6),1266-1278.
MLA	Sun Guodong,et al."Response of a Grassland Ecosystem to Climate Change in a Theoretical Model".ADVANCES IN ATMOSPHERIC SCIENCES 28.6(2011):1266-1278.