Representations of Precipitation Diurnal Cycle in the Amazon as Simulated by Observationally Constrained Cloud‐System Resolving and Global Climate Models

Abstract The ability of an observationally‐constrained cloud‐system resolving model (Weather Research and Forecasting; WRF, 4‐km grid spacing) and a global climate model (Energy Exascale Earth System Model; E3SM, 1‐degree grid spacing) to represent the precipitation diurnal cycle over the Amazon bas...

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Autores principales:	Sheng‐Lun Tai, Zhe Feng, Po‐Lun Ma, Courtney Schumacher, Jerome D. Fast
Formato:	article
Lenguaje:	EN
Publicado:	American Geophysical Union (AGU) 2021
Materias:	precipitation Amazon diurnal cycle data assimilation mesoscale convective system sea breeze Physical geography GB3-5030 Oceanography GC1-1581
Acceso en línea:	https://doaj.org/article/c8746bfb5ac644158cf2161634674e6e
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spelling	oai:doaj.org-article:c8746bfb5ac644158cf2161634674e6e2021-11-30T08:40:32ZRepresentations of Precipitation Diurnal Cycle in the Amazon as Simulated by Observationally Constrained Cloud‐System Resolving and Global Climate Models1942-246610.1029/2021MS002586https://doaj.org/article/c8746bfb5ac644158cf2161634674e6e2021-11-01T00:00:00Zhttps://doi.org/10.1029/2021MS002586https://doaj.org/toc/1942-2466Abstract The ability of an observationally‐constrained cloud‐system resolving model (Weather Research and Forecasting; WRF, 4‐km grid spacing) and a global climate model (Energy Exascale Earth System Model; E3SM, 1‐degree grid spacing) to represent the precipitation diurnal cycle over the Amazon basin during the 2014 wet season is assessed. The WRF model coupled with a 3‐D variational data assimilation scheme reproduces the spatial variability of the precipitation diurnal cycle over the basin and the lifecycle of westward propagating MCSs initiated by the coastal sea‐breeze front. In contrast, a single morning peak in rainfall is produced by E3SM for simulations despite the nudging of large‐scale winds toward global reanalysis, indicating precipitation in E3SM is largely controlled by local convection associated with diurnal heating. The role of propagating MCS on the environment are discussed by using a multivariate perturbation analysis. We also find that the advection of moisture perturbations from ocean to inland regions have a higher correlation with the occurrence of MCSs in the Amazon than the intensity of colder air intrusion associated with sea breezes along the coast. Moreover, the presence of large cold pools over the central Amazon basin are responsible for the maintenance of propagating deep convection.Sheng‐Lun TaiZhe FengPo‐Lun MaCourtney SchumacherJerome D. FastAmerican Geophysical Union (AGU)articleprecipitationAmazondiurnal cycledata assimilationmesoscale convective systemsea breezePhysical 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	precipitation Amazon diurnal cycle data assimilation mesoscale convective system sea breeze Physical geography GB3-5030 Oceanography GC1-1581
spellingShingle	precipitation Amazon diurnal cycle data assimilation mesoscale convective system sea breeze Physical geography GB3-5030 Oceanography GC1-1581 Sheng‐Lun Tai Zhe Feng Po‐Lun Ma Courtney Schumacher Jerome D. Fast Representations of Precipitation Diurnal Cycle in the Amazon as Simulated by Observationally Constrained Cloud‐System Resolving and Global Climate Models
description	Abstract The ability of an observationally‐constrained cloud‐system resolving model (Weather Research and Forecasting; WRF, 4‐km grid spacing) and a global climate model (Energy Exascale Earth System Model; E3SM, 1‐degree grid spacing) to represent the precipitation diurnal cycle over the Amazon basin during the 2014 wet season is assessed. The WRF model coupled with a 3‐D variational data assimilation scheme reproduces the spatial variability of the precipitation diurnal cycle over the basin and the lifecycle of westward propagating MCSs initiated by the coastal sea‐breeze front. In contrast, a single morning peak in rainfall is produced by E3SM for simulations despite the nudging of large‐scale winds toward global reanalysis, indicating precipitation in E3SM is largely controlled by local convection associated with diurnal heating. The role of propagating MCS on the environment are discussed by using a multivariate perturbation analysis. We also find that the advection of moisture perturbations from ocean to inland regions have a higher correlation with the occurrence of MCSs in the Amazon than the intensity of colder air intrusion associated with sea breezes along the coast. Moreover, the presence of large cold pools over the central Amazon basin are responsible for the maintenance of propagating deep convection.
format	article
author	Sheng‐Lun Tai Zhe Feng Po‐Lun Ma Courtney Schumacher Jerome D. Fast
author_facet	Sheng‐Lun Tai Zhe Feng Po‐Lun Ma Courtney Schumacher Jerome D. Fast
author_sort	Sheng‐Lun Tai
title	Representations of Precipitation Diurnal Cycle in the Amazon as Simulated by Observationally Constrained Cloud‐System Resolving and Global Climate Models
title_short	Representations of Precipitation Diurnal Cycle in the Amazon as Simulated by Observationally Constrained Cloud‐System Resolving and Global Climate Models
title_full	Representations of Precipitation Diurnal Cycle in the Amazon as Simulated by Observationally Constrained Cloud‐System Resolving and Global Climate Models
title_fullStr	Representations of Precipitation Diurnal Cycle in the Amazon as Simulated by Observationally Constrained Cloud‐System Resolving and Global Climate Models
title_full_unstemmed	Representations of Precipitation Diurnal Cycle in the Amazon as Simulated by Observationally Constrained Cloud‐System Resolving and Global Climate Models
title_sort	representations of precipitation diurnal cycle in the amazon as simulated by observationally constrained cloud‐system resolving and global climate models
publisher	American Geophysical Union (AGU)
publishDate	2021
url	https://doaj.org/article/c8746bfb5ac644158cf2161634674e6e
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Representations of Precipitation Diurnal Cycle in the Amazon as Simulated by Observationally Constrained Cloud‐System Resolving and Global Climate Models

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