DOI: 10.1007/s00382-013-1898-2
Scopus记录号: 2-s2.0-84894997589
论文题名: Effect of aerosol pollution on clouds and its dependence on precipitation intensity
作者: Lee S.S. ; Kim B.-G. ; Lee C. ; Yum S.S. ; Posselt D.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 42, 期: 2017-03-04 起始页码: 557
结束页码: 577
语种: 英语
英文关键词: Aerosol
; Cloud
; Precipitation
英文摘要: In this study, simulations performed with a large-eddy resolving numerical model are used to examine the effect of aerosol on cumulus clouds, and how this effect varies with precipitation intensity. By systematically varying the surface moisture fluxes, the modeled precipitation rate is forced to change from weak to strong intensity. For each of these intensities, simulations of a high-aerosol case (a polluted case with a higher aerosol concentration) and a low-aerosol case (a clean case with a lower aerosol concentration) are performed. Whether or not precipitation and associated sub-cloud evaporation and convective available potential energy (CAPE) are large, liquid-water path (LWP) is larger in the high-aerosol case than in the low-aerosol case over the first two-thirds of the entire simulation period. In weak precipitation cases, reduction in aerosol content leads to changes in CAPE in the middle parts of cloud layers, which in turn induces larger LWP in the low-aerosol case over the last third of the simulation period. With strong precipitation, stronger stabilization of the sub-cloud layers in the low-aerosol case counters the CAPE changes in the middle parts of cloud layers, inducing smaller LWP in the low-aerosol case over the last third of the simulation period. The results highlight an interaction between aerosol effects on CAPE above cloud base and those in sub-cloud layers, and indicate the importance of a consideration of aerosol effects on CAPE above cloud base as well as those in sub-cloud layers. In the high-aerosol case, near the beginning of the simulation period, larger environmental CAPE does not necessarily lead to larger in-cloud CAPE and associated larger cloud intensity because aerosol-induced increase in cloud population enhances competition among clouds for the environmental CAPE. This demonstrates the importance of the consideration of cloud population for an improved parameterization of convective clouds in climate models. © 2013 Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54299
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, MI, United States; Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado, Boulder, CO, United States; Department of Atmospheric Environmental Sciences, Gangneung-Wonju National University, Gangneung, Gangwon do, South Korea; Applied Meteorological Research Division, National Institute of Meteorological Research (NIMR), Korea Meteorological Administration (KMA), Seoul, South Korea; Department of Atmospheric Sciences, Yonsei University, Seoul, South Korea
Recommended Citation:
Lee S.S.,Kim B.-G.,Lee C.,et al. Effect of aerosol pollution on clouds and its dependence on precipitation intensity[J]. Climate Dynamics,2014-01-01,42(2017-03-04)