DOI: 10.1002/jgrd.50043
论文题名: Aerosol effect on the warm rain formation process: Satellite observations and modeling
作者: Suzuki K. ; Stephens G.L. ; Lebsock M.D.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 1 起始页码: 170
结束页码: 184
语种: 英语
英文关键词: aerosol-cloud interaction
; cloud microphysics
; precipitation process
Scopus关键词: Aerosols
; Computer simulation
; Lasers
; Physics
; Aerosol-cloud interaction
; Cloud microphysical process
; Cloud microphysics
; High-resolution models
; Observational analysis
; Precipitation formation
; Precipitation process
; Satellite observations
; Rain
; aerosol composition
; atmospheric modeling
; cloud microphysics
; parameterization
; precipitation (climatology)
; satellite data
英文摘要: This study demonstrates how aerosols influence the liquid precipitation formation process. This demonstration is provided by the combined use of satellite observations and global high-resolution model simulations. Methodologies developed to examine the warm cloud microphysical processes are applied to both multi-sensor satellite observations and aerosol-coupled global cloud-resolving model (GCRM) results to illustrate how the warm rain formation process is modulated under different aerosol conditions. The observational analysis exhibits process-scale signatures of rain suppression due to increased aerosols, providing observational evidence of the aerosol influence on precipitation. By contrast, the corresponding statistics obtained from the model show a much faster rain formation even for polluted aerosol conditions and much weaker reduction of precipitation in response to aerosol increase. It is then shown that this reduced sensitivity points to a fundamental model bias in the warm rain formation process that in turn biases the influence of aerosol on precipitation. A method of improving the model bias is introduced in the context of a simplified single-column model (SCM) that represents the cloud-to-rain water conversion process in a manner similar to the original GCRM. Sensitivity experiments performed by modifying the model assumptions in the SCM and their comparisons to satellite statistics both suggest that the auto-conversion scheme has a critical role in determining the precipitation response to aerosol perturbations and also provide a novel way of constraining key parameters in the auto-conversion schemes of global models. Key Points Satellite observation analysis of aerosol effect on precipitation Global model evaluation of aerosol effect on precipitation Proposing a way of constraining microphysics parameterizations ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63968
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA, 91109, United States
Recommended Citation:
Suzuki K.,Stephens G.L.,Lebsock M.D.. Aerosol effect on the warm rain formation process: Satellite observations and modeling[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(1)