15 Dec 2021
15 Dec 2021
Status: a revised version of this preprint was accepted for the journal ACP.

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?

Seoung Soo Lee1,2, Jinho Choi3, Goun Kim4, Kyung-Ja Ha2,5,6, Kyong-Hwan Seo3, Junshik Um3, and Youtong Zheng7 Seoung Soo Lee et al.
  • 1Earth System Science Interdisciplinary Center, University of Maryland, Maryland
  • 2Research Center for Climate Sciences, Pusan National University, Busan, Republic of Korea
  • 3Department of Atmospheric Sciences, Division of Earth Environmental System, Pusan National University, Busan, Republic of Korea
  • 4Marine Disaster Research Center, Korea Institute of Ocean Science and Technology, Pusan, Republic of Korea
  • 5Center for Climate Physics, Institute for Basic Science, Busan, Republic of Korea
  • 6BK21 School of Earth and Environmental Systems, Pusan National University, Busan, Republic of Korea
  • 7The Program in Atmospheric and Oceanic Sciences, Princeton University, and National Oceanic and Atmospheric Administration/Geophysical Fluid Dynamics Laboratory, Princeton, New Jersey, USA

Abstract. This study examines the role played by aerosols in the development of clouds and precipitation in two metropolitan areas in East Asia that has experienced substantial increases in aerosol concentrations over the last decades. These two areas are the Seoul and Beijing areas and the examination has been done by performing simulations using a cloud-system resolving model (CSRM). Aerosols are advected from the continent to the Seoul area and this increases aerosol concentrations in the Seoul area. These increased aerosol 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 aerosol concentrations also enhance condensation but reduce deposition. This leads to aerosol-induced negligible changes in 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 aerosol concentrations among different types of precipitation, which are light, medium and heavy precipitation in the Beijing area. In both of the areas, aerosol-induced changes in freezing play a negligible role in aerosol-precipitation interactions as compared to the role played by aerosol-induced changes in condensation and deposition.

Seoung Soo Lee et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2021-917', Anonymous Referee #1, 30 Dec 2021
    • AC1: 'Reply on RC1', Seoung Soo Lee, 29 Mar 2022
  • RC2: 'Comment on acp-2021-917', Anonymous Referee #2, 05 Jan 2022
    • AC2: 'Reply on RC2', Seoung Soo Lee, 29 Mar 2022

Seoung Soo Lee et al.

Seoung Soo Lee et al.


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Short summary
This study investigates how aerosols affect clouds and precipitation and how those aerosol effects vary with varying types of clouds that are characterized by cloud depth in two metropolitan areas in East Asia. As cloud depth increases, the enhancement of precipitation amount transitions to no changes in precipitation amount with increasing aerosol concentrations. This indicates that cloud depth needs to be considered for a comprehensive understanding of aerosol-cloud interactions.