Multiscale Simulation of Precipitation Over East Asia by Variable Resolution CAM‐MPAS

Abstract This study evaluates the precipitation over East Asia simulated by the variable resolution CAM‐MPAS featuring the Model for Prediction Across Scales (MPAS) atmospheric dynamical core coupled with the physics parameterizations of the Community Atmosphere Model (CAM) version 5.4. Two CAM‐MPAS...

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Autores principales:	Yuan Liang, Ben Yang, Minghuai Wang, Jianping Tang, Koichi Sakaguchi, L. Ruby Leung, Xin Xu
Formato:	article
Lenguaje:	EN
Publicado:	American Geophysical Union (AGU) 2021
Materias:	variable resolution precipitation East Asia MPAS GCM Physical geography GB3-5030 Oceanography GC1-1581
Acceso en línea:	https://doaj.org/article/8d0eed7d58b444d39916afc3edb68a86
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spelling	oai:doaj.org-article:8d0eed7d58b444d39916afc3edb68a862021-11-30T08:40:32ZMultiscale Simulation of Precipitation Over East Asia by Variable Resolution CAM‐MPAS1942-246610.1029/2021MS002656https://doaj.org/article/8d0eed7d58b444d39916afc3edb68a862021-11-01T00:00:00Zhttps://doi.org/10.1029/2021MS002656https://doaj.org/toc/1942-2466Abstract This study evaluates the precipitation over East Asia simulated by the variable resolution CAM‐MPAS featuring the Model for Prediction Across Scales (MPAS) atmospheric dynamical core coupled with the physics parameterizations of the Community Atmosphere Model (CAM) version 5.4. Two CAM‐MPAS experiments, one with a global quasi‐uniform resolution mesh of 120 km (MPAS‐UR) and the other with a variable resolution mesh of 30–120 km refined over East Asia (MPAS‐VR), are conducted from 1989 to 2005 following the Atmospheric Model Intercomparison Project protocol. Two regional climate model simulations at ∼25 km resolution from the Coordinated Regional Downscaling Experiment East Asia second plan are also analyzed for comparison. Results show that CAM‐MPAS performs better than the selected regional models in simulating the precipitation climatology over East Asia. Compared with MPAS‐UR, MPAS‐VR with refinement over East Asia better simulates the precipitation over and around the Tibetan Plateau (TP), the upper‐level circulation, the precipitation frequency and intensity in various regions of China, and the interannual precipitation pattern associated with the East Asian summer monsoon. Both decreased grid spacing and the use of finer‐scale terrain information contribute to the improvements in MPAS‐VR relative to MPAS‐UR. However, decreased grid spacing is more essential for simulating the precipitation magnitude over TP and the location of peak precipitation south of TP, likely due to the better resolved physical and dynamical processes associated with orographic precipitation. The 30–120 km CAM‐MPAS model is shown to be a promising tool for precipitation simulation over East Asia.Yuan LiangBen YangMinghuai WangJianping TangKoichi SakaguchiL. Ruby LeungXin XuAmerican Geophysical Union (AGU)articlevariable resolutionprecipitationEast AsiaMPASGCMPhysical 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	variable resolution precipitation East Asia MPAS GCM Physical geography GB3-5030 Oceanography GC1-1581
spellingShingle	variable resolution precipitation East Asia MPAS GCM Physical geography GB3-5030 Oceanography GC1-1581 Yuan Liang Ben Yang Minghuai Wang Jianping Tang Koichi Sakaguchi L. Ruby Leung Xin Xu Multiscale Simulation of Precipitation Over East Asia by Variable Resolution CAM‐MPAS
description	Abstract This study evaluates the precipitation over East Asia simulated by the variable resolution CAM‐MPAS featuring the Model for Prediction Across Scales (MPAS) atmospheric dynamical core coupled with the physics parameterizations of the Community Atmosphere Model (CAM) version 5.4. Two CAM‐MPAS experiments, one with a global quasi‐uniform resolution mesh of 120 km (MPAS‐UR) and the other with a variable resolution mesh of 30–120 km refined over East Asia (MPAS‐VR), are conducted from 1989 to 2005 following the Atmospheric Model Intercomparison Project protocol. Two regional climate model simulations at ∼25 km resolution from the Coordinated Regional Downscaling Experiment East Asia second plan are also analyzed for comparison. Results show that CAM‐MPAS performs better than the selected regional models in simulating the precipitation climatology over East Asia. Compared with MPAS‐UR, MPAS‐VR with refinement over East Asia better simulates the precipitation over and around the Tibetan Plateau (TP), the upper‐level circulation, the precipitation frequency and intensity in various regions of China, and the interannual precipitation pattern associated with the East Asian summer monsoon. Both decreased grid spacing and the use of finer‐scale terrain information contribute to the improvements in MPAS‐VR relative to MPAS‐UR. However, decreased grid spacing is more essential for simulating the precipitation magnitude over TP and the location of peak precipitation south of TP, likely due to the better resolved physical and dynamical processes associated with orographic precipitation. The 30–120 km CAM‐MPAS model is shown to be a promising tool for precipitation simulation over East Asia.
format	article
author	Yuan Liang Ben Yang Minghuai Wang Jianping Tang Koichi Sakaguchi L. Ruby Leung Xin Xu
author_facet	Yuan Liang Ben Yang Minghuai Wang Jianping Tang Koichi Sakaguchi L. Ruby Leung Xin Xu
author_sort	Yuan Liang
title	Multiscale Simulation of Precipitation Over East Asia by Variable Resolution CAM‐MPAS
title_short	Multiscale Simulation of Precipitation Over East Asia by Variable Resolution CAM‐MPAS
title_full	Multiscale Simulation of Precipitation Over East Asia by Variable Resolution CAM‐MPAS
title_fullStr	Multiscale Simulation of Precipitation Over East Asia by Variable Resolution CAM‐MPAS
title_full_unstemmed	Multiscale Simulation of Precipitation Over East Asia by Variable Resolution CAM‐MPAS
title_sort	multiscale simulation of precipitation over east asia by variable resolution cam‐mpas
publisher	American Geophysical Union (AGU)
publishDate	2021
url	https://doaj.org/article/8d0eed7d58b444d39916afc3edb68a86
work_keys_str_mv	AT yuanliang multiscalesimulationofprecipitationovereastasiabyvariableresolutioncammpas AT benyang multiscalesimulationofprecipitationovereastasiabyvariableresolutioncammpas AT minghuaiwang multiscalesimulationofprecipitationovereastasiabyvariableresolutioncammpas AT jianpingtang multiscalesimulationofprecipitationovereastasiabyvariableresolutioncammpas AT koichisakaguchi multiscalesimulationofprecipitationovereastasiabyvariableresolutioncammpas AT lrubyleung multiscalesimulationofprecipitationovereastasiabyvariableresolutioncammpas AT xinxu multiscalesimulationofprecipitationovereastasiabyvariableresolutioncammpas
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Multiscale Simulation of Precipitation Over East Asia by Variable Resolution CAM‐MPAS

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