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

IOCAS-IR

	Response of a Grassland Ecosystem to Climate Change in a Theoretical Model
	Sun GD(孙国栋); Mu M(穆穆)
发表期刊	Advances in Atmospheric Sciences
ISSN	0256-1530
	2011-11-15
出版年	2011
卷号	v.28 期号:06 页码:36-48
文献类型	CNKI期刊论文
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 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.
关键词	conditional nonlinear optimal perturbation,parameter perturbation,CNOP-P,grassland ecosystem,climate change
CNKI专辑号	A;
CNKI专辑名称	基础科学;
CNKI专题号	A009;
CNKI专题名称	气象学;
分类号	S812.1
收录类别	中科院核心
语种	英文;
资助项目(基金）	supported by National Natural Science Foundation of China(Grant Nos. 40905050,40805020,40830955) ; the Chinese Academy of Sciences (Grants No. KZCX3-SW-230),LASG Free Exploration Fund,and LASG State Key Lab-oratory Special Fund
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/191470
专题	中国科学院海洋研究所
作者单位	1.TheStateKeyLaboratoryofNumericalModelingforAtmosphericSciencesandGeophysicalFluidDynamics,InstituteofAtmosphericPhysics,ChineseAcademyofSciences 2.KeyLaboratoryofOceanCirculationandWave,InstituteofOceanology,ChineseAcademyofSciences
推荐引用方式 GB/T 7714	Sun GD,Mu M. Response of a Grassland Ecosystem to Climate Change in a Theoretical Model. 2011.