Sensitivity of precipitation and atmospheric low-level circulation patterns to domain size and choice of parameterization schemes in RegCM4.4 over Central America

The sensitivity of regional climate model simulations to domain size and position is becoming increasingly important for generating reliable climate scenarios. In this study, the Central America CORDEX domain (CCA) at 50 km horizontal resolution with a relaxation zone of 10° around the boundaries (C...

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Detalles Bibliográficos
Autores: Rivera Fernández, Erick, Amador Astúa, Jorge Alberto, Sáenz Soto, Fernán
Tipo de recurso: artículo
Fecha de publicación:2022
País:Costa Rica
Institución:Universidad de Costa Rica
Repositorio:Kérwá
Idioma:inglés
OAI Identifier:oai:kerwa.ucr.ac.cr:10669/89288
Acceso en línea:https://www.int-res.com/abstracts/cr/v89/p61-83/
https://hdl.handle.net/10669/89288
Access Level:acceso abierto
Palabra clave:Regional climate model
Model sensitivity
Domain size
Parameterizations
CORDEX Central America
RegCM
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dc.title.es_ES.fl_str_mv Sensitivity of precipitation and atmospheric low-level circulation patterns to domain size and choice of parameterization schemes in RegCM4.4 over Central America
title Sensitivity of precipitation and atmospheric low-level circulation patterns to domain size and choice of parameterization schemes in RegCM4.4 over Central America
spellingShingle Sensitivity of precipitation and atmospheric low-level circulation patterns to domain size and choice of parameterization schemes in RegCM4.4 over Central America
Rivera Fernández, Erick
Regional climate model
Model sensitivity
Domain size
Parameterizations
CORDEX Central America
RegCM
title_short Sensitivity of precipitation and atmospheric low-level circulation patterns to domain size and choice of parameterization schemes in RegCM4.4 over Central America
title_full Sensitivity of precipitation and atmospheric low-level circulation patterns to domain size and choice of parameterization schemes in RegCM4.4 over Central America
title_fullStr Sensitivity of precipitation and atmospheric low-level circulation patterns to domain size and choice of parameterization schemes in RegCM4.4 over Central America
title_full_unstemmed Sensitivity of precipitation and atmospheric low-level circulation patterns to domain size and choice of parameterization schemes in RegCM4.4 over Central America
title_sort Sensitivity of precipitation and atmospheric low-level circulation patterns to domain size and choice of parameterization schemes in RegCM4.4 over Central America
dc.creator.none.fl_str_mv Rivera Fernández, Erick
Amador Astúa, Jorge Alberto
Sáenz Soto, Fernán
author Rivera Fernández, Erick
author_facet Rivera Fernández, Erick
Amador Astúa, Jorge Alberto
Sáenz Soto, Fernán
author_role author
author2 Amador Astúa, Jorge Alberto
Sáenz Soto, Fernán
author2_role author
author
dc.subject.es_ES.fl_str_mv Regional climate model
Model sensitivity
Domain size
Parameterizations
CORDEX Central America
RegCM
topic Regional climate model
Model sensitivity
Domain size
Parameterizations
CORDEX Central America
RegCM
description The sensitivity of regional climate model simulations to domain size and position is becoming increasingly important for generating reliable climate scenarios. In this study, the Central America CORDEX domain (CCA) at 50 km horizontal resolution with a relaxation zone of 10° around the boundaries (CCA+) was taken as the basis to increase domain size in the RegCM4.4 model. The low-level circulation and precipitation patterns over Central America, the western Caribbean Sea, and the eastern tropical Pacific do not show strong sensitivity to domain size changes for an area increment of 18, 32, and 52% with respect to the size of CCA+. The physical configuration in RegCM4.4 has a greater impact on the representation of relevant climate characteristics and atmospheric processes. Simulated 925 hPa winds over the Caribbean low-level jet (CLLJ) region show unrealistic winter and summer intensities, especially in July. Similar issues were found in other studies for the CCA domain, using different models and physical configurations. A reduction of the critical Richardson number in the selected planetary boundary layer scheme resulted in little change in the strength of the summer component of the CLLJ. The model simulations do not completely capture key regional precipitation patterns such as the midsummer drought, due to limitations in adequately representing low-level circulation. However, simulations using the Grell cumulus parameterization perform relatively better than those using a mixed scheme (Grell over land−Emanuel over ocean).
publishDate 2022
dc.date.issued.none.fl_str_mv 2022-12
dc.date.accessioned.none.fl_str_mv 2023-05-24T20:12:22Z
dc.date.available.none.fl_str_mv 2023-05-24T20:12:22Z
dc.type.es_ES.fl_str_mv artículo original
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info:eu-repo/semantics/article
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dc.identifier.citation.es_ES.fl_str_mv https://www.int-res.com/abstracts/cr/v89/p61-83/
dc.identifier.uri.none.fl_str_mv https://hdl.handle.net/10669/89288
dc.identifier.doi.none.fl_str_mv 10.3354/cr01707
dc.identifier.codproyecto.none.fl_str_mv 805-A4-906
805-A5-719
805-B0-810
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805-B8-604
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url https://www.int-res.com/abstracts/cr/v89/p61-83/
https://hdl.handle.net/10669/89288
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dc.language.iso.es_ES.fl_str_mv eng
language eng
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dc.source.es_ES.fl_str_mv CLIMATE RESEARCH, Vol.89: pp. 61–83
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spelling Rivera Fernández, Erick199e55a0-099d-4eca-9541-3857a85d5317600Amador Astúa, Jorge Alberto01c375a2-bce8-42eb-8443-1b68b5ec1393600Sáenz Soto, Fernán587b0c53-eb1f-4825-b44e-c3cabbf7db576002023-05-24T20:12:22Z2023-05-24T20:12:22Z2022-12https://www.int-res.com/abstracts/cr/v89/p61-83/https://hdl.handle.net/10669/8928810.3354/cr01707805-A4-906805-A5-719805-B0-810805-B5-296805-B8-604805-B9-454805-B9-609The sensitivity of regional climate model simulations to domain size and position is becoming increasingly important for generating reliable climate scenarios. In this study, the Central America CORDEX domain (CCA) at 50 km horizontal resolution with a relaxation zone of 10° around the boundaries (CCA+) was taken as the basis to increase domain size in the RegCM4.4 model. The low-level circulation and precipitation patterns over Central America, the western Caribbean Sea, and the eastern tropical Pacific do not show strong sensitivity to domain size changes for an area increment of 18, 32, and 52% with respect to the size of CCA+. The physical configuration in RegCM4.4 has a greater impact on the representation of relevant climate characteristics and atmospheric processes. Simulated 925 hPa winds over the Caribbean low-level jet (CLLJ) region show unrealistic winter and summer intensities, especially in July. Similar issues were found in other studies for the CCA domain, using different models and physical configurations. A reduction of the critical Richardson number in the selected planetary boundary layer scheme resulted in little change in the strength of the summer component of the CLLJ. The model simulations do not completely capture key regional precipitation patterns such as the midsummer drought, due to limitations in adequately representing low-level circulation. 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