A Double‐Moment SBU‐YLIN Cloud Microphysics Scheme and Its Impact on a Squall Line Simulation

Abstract A double‐moment version of the SBU‐YLIN cloud microphysical scheme in WRF is introduced. It predicts the mass and number mixing ratios of cloud droplet, rain, cloud ice, and precipitating ice. In addition, a number of physical processes, like rain evaporation, collection between rain and sn...

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Autores principales:	Xi Zhao, Yanluan Lin, Yali Luo, Qifeng Qian, Xi Liu, Xiantong Liu, Brian A. Colle
Formato:	article
Lenguaje:	EN
Publicado:	American Geophysical Union (AGU) 2021
Materias:	cloud microphysics squall line cold pool transition zone stratiform precipitation Physical geography GB3-5030 Oceanography GC1-1581
Acceso en línea:	https://doaj.org/article/90b66d71c8994c079bc3cc60dbcdd18f
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spelling	oai:doaj.org-article:90b66d71c8994c079bc3cc60dbcdd18f2021-11-30T08:40:32ZA Double‐Moment SBU‐YLIN Cloud Microphysics Scheme and Its Impact on a Squall Line Simulation1942-246610.1029/2021MS002545https://doaj.org/article/90b66d71c8994c079bc3cc60dbcdd18f2021-11-01T00:00:00Zhttps://doi.org/10.1029/2021MS002545https://doaj.org/toc/1942-2466Abstract A double‐moment version of the SBU‐YLIN cloud microphysical scheme in WRF is introduced. It predicts the mass and number mixing ratios of cloud droplet, rain, cloud ice, and precipitating ice. In addition, a number of physical processes, like rain evaporation, collection between rain and snow are also optimized in the new scheme. The scheme is evaluated and compared with the original one‐moment scheme for a squall line case. We found that the double‐moment approach gives a better representation of rain evaporation, which is critical for the development, morphology, and evolution of the simulated squall line, especially for the enhanced trailing stratiform cloud and leading convective line. The relationship between key microphysical processes and squall line dynamics is investigated to identify the driving mechanisms of the descending rear inflow, cold pool, and slantwise updraft. Furthermore, formation of the transition zone in the simulated squall line strongly depends on the flexible description of ice particle properties, such as size, degree of riming and fall speed.Xi ZhaoYanluan LinYali LuoQifeng QianXi LiuXiantong LiuBrian A. ColleAmerican Geophysical Union (AGU)articlecloud microphysicssquall linecold pooltransition zonestratiform precipitationPhysical geographyGB3-5030OceanographyGC1-1581ENJournal of Advances in Modeling Earth Systems, Vol 13, Iss 11, Pp n/a-n/a (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	cloud microphysics squall line cold pool transition zone stratiform precipitation Physical geography GB3-5030 Oceanography GC1-1581
spellingShingle	cloud microphysics squall line cold pool transition zone stratiform precipitation Physical geography GB3-5030 Oceanography GC1-1581 Xi Zhao Yanluan Lin Yali Luo Qifeng Qian Xi Liu Xiantong Liu Brian A. Colle A Double‐Moment SBU‐YLIN Cloud Microphysics Scheme and Its Impact on a Squall Line Simulation
description	Abstract A double‐moment version of the SBU‐YLIN cloud microphysical scheme in WRF is introduced. It predicts the mass and number mixing ratios of cloud droplet, rain, cloud ice, and precipitating ice. In addition, a number of physical processes, like rain evaporation, collection between rain and snow are also optimized in the new scheme. The scheme is evaluated and compared with the original one‐moment scheme for a squall line case. We found that the double‐moment approach gives a better representation of rain evaporation, which is critical for the development, morphology, and evolution of the simulated squall line, especially for the enhanced trailing stratiform cloud and leading convective line. The relationship between key microphysical processes and squall line dynamics is investigated to identify the driving mechanisms of the descending rear inflow, cold pool, and slantwise updraft. Furthermore, formation of the transition zone in the simulated squall line strongly depends on the flexible description of ice particle properties, such as size, degree of riming and fall speed.
format	article
author	Xi Zhao Yanluan Lin Yali Luo Qifeng Qian Xi Liu Xiantong Liu Brian A. Colle
author_facet	Xi Zhao Yanluan Lin Yali Luo Qifeng Qian Xi Liu Xiantong Liu Brian A. Colle
author_sort	Xi Zhao
title	A Double‐Moment SBU‐YLIN Cloud Microphysics Scheme and Its Impact on a Squall Line Simulation
title_short	A Double‐Moment SBU‐YLIN Cloud Microphysics Scheme and Its Impact on a Squall Line Simulation
title_full	A Double‐Moment SBU‐YLIN Cloud Microphysics Scheme and Its Impact on a Squall Line Simulation
title_fullStr	A Double‐Moment SBU‐YLIN Cloud Microphysics Scheme and Its Impact on a Squall Line Simulation
title_full_unstemmed	A Double‐Moment SBU‐YLIN Cloud Microphysics Scheme and Its Impact on a Squall Line Simulation
title_sort	double‐moment sbu‐ylin cloud microphysics scheme and its impact on a squall line simulation
publisher	American Geophysical Union (AGU)
publishDate	2021
url	https://doaj.org/article/90b66d71c8994c079bc3cc60dbcdd18f
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A Double‐Moment SBU‐YLIN Cloud Microphysics Scheme and Its Impact on a Squall Line Simulation

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