Response of a Grassland Ecosystem to Climate Change in a Theoretical Model
文献类型：CNKI期刊论文
| 作者 | Sun GD(孙国栋); Mu M(穆穆) |
| 发表日期 | 2011-11-15 |
| 出处 | Advances in Atmospheric Sciences
 |
| 关键词 | conditional nonlinear optimal perturbation,parameter perturbation,CNOP-P,grassland ecosystem,climate change |
| 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 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. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | 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 |
| 卷 | v.28期:06页:36-48 |
| 语种 | 英文; |
| 分类号 | S812.1 |
| ISSN号 | 0256-1530 |
| 源URL | [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. |
入库方式： OAI收割
来源：海洋研究所
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