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Examination of aerosol impacts on convective clouds and precipitation in two metropolitan areas in East Asia; how varying depths of convective clouds between the areas diversify those aerosol effects?

Authors :
Lee, Seoung Soo
Choi, Jinho
Kim, Goun
Ha, Kyung-Ja
Seo, Kyong-Hwan
Jung, Chang Hoon
Um, Junshik
Zheng, Youtong
Guo, Jianping
Song, Sang-Keun
Lee, Yun Gon
Utsumi, Nobuyuki
Source :
Atmospheric Chemistry & Physics; 2022, Vol. 22 Issue 13, p9059-9081, 23p
Publication Year :
2022

Abstract

This study examines the role played by aerosols which act as cloud condensation nuclei (CCN) in the development of clouds and precipitation in two metropolitan areas in East Asia that have experienced substantial increases in aerosol concentrations over the last decades. These two areas are the Seoul and Beijing areas and the examination was done by performing simulations using the Advanced Research Weather Research and Forecasting model as a cloud system resolving model. The CCN are advected from the continent to the Seoul area and this increases aerosol concentrations in the Seoul area. These increased CCN concentrations induce the enhancement of condensation that in turn induces the enhancement of deposition and precipitation amount in a system of less deep convective clouds as compared to those in the Beijing area. In a system of deeper clouds in the Beijing area, increasing CCN concentrations also enhance condensation but reduce deposition. This leads to negligible CCN-induced changes in the precipitation amount. Also, in the system there is a competition for convective energy among clouds with different condensation and updrafts. This competition results in different responses to increasing CCN concentrations among different types of precipitation, which are light, medium and heavy precipitation in the Beijing area. The CCN-induced changes in freezing play a negligible role in CCN-precipitation interactions as compared to the role played by CCN-induced changes in condensation and deposition in both areas. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
16807316
Volume :
22
Issue :
13
Database :
Complementary Index
Journal :
Atmospheric Chemistry & Physics
Publication Type :
Academic Journal
Accession number :
158116428
Full Text :
https://doi.org/10.5194/acp-22-9059-2022