Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-21-2017 |
Why do general circulation models overestimate the aerosol cloud lifetime effect? A case study comparing CAM5 and a CRM | |
Zhou, Cheng; Penner, Joyce E. | |
2017-01-02 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Observation-based studies have shown that the aerosol cloud lifetime effect or the increase of cloud liquid water path (LWP) with increased aerosol loading may have been overestimated in climate models. Here, we simulate shallow warm clouds on 27 May 2011 at the southern Great Plains (SGP) measurement site established by the Department of Energy's (DOE) Atmospheric Radiation Measurement (ARM) program using a single-column version of a global climate model (Community Atmosphere Model or CAM) and a cloud resolving model (CRM). The LWP simulated by CAM increases substantially with aerosol loading while that in the CRM does not. The increase of LWP in CAM is caused by a large decrease of the autoconversion rate when cloud droplet number increases. In the CRM, the autoconversion rate is also reduced, but this is offset or even outweighed by the increased evaporation of cloud droplets near the cloud top, resulting in an overall decrease in LWP. Our results suggest that climate models need to include the dependence of cloud top growth and the evaporation/condensation process on cloud droplet number concentrations. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000392100900002 |
WOS关键词 | PART I ; RESOLVING MODELS ; SINGLE-COLUMN ; MICROPHYSICS ; PARAMETERIZATION ; SIMULATIONS ; RADIATION ; SYSTEM ; CUMULI ; SCHEME |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/30660 |
专题 | 地球科学 |
作者单位 | Univ Michigan, Dept Climate & Space Sci & Engn, Ann Arbor, MI 48109 USA |
推荐引用方式 GB/T 7714 | Zhou, Cheng,Penner, Joyce E.. Why do general circulation models overestimate the aerosol cloud lifetime effect? A case study comparing CAM5 and a CRM[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(1). |
APA | Zhou, Cheng,&Penner, Joyce E..(2017).Why do general circulation models overestimate the aerosol cloud lifetime effect? A case study comparing CAM5 and a CRM.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(1). |
MLA | Zhou, Cheng,et al."Why do general circulation models overestimate the aerosol cloud lifetime effect? A case study comparing CAM5 and a CRM".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.1(2017). |
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