January and July regional climate simulation over South America

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This work presents results, over the South American region, from the CSIRO Division of Atmospheric Research limited area model (DARLAM) and from the ninelevel general circulation model (GCM) of CSIRO (CSIRO Mk 2), within which it was nested in a one-way mode. Ten separate 30-day DARLAM simulations w...

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Autores principales:	Nicolini, Matilde, Salio, Paola Veronica, Saulo, Andrea Celeste
Publicado:	2002
Materias:	1620 Global Change: Climate dynamics (3309) 3309 Meteorology and Atmospheric Dynamics: Climatology (1620) 3337 Meteorology and Atmospheric Dynamics: Numerical modeling and data assimilation
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01480227_v107_n22_pXXXIII_Nicolini http://hdl.handle.net/20.500.12110/paper_01480227_v107_n22_pXXXIII_Nicolini
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_01480227_v107_n22_pXXXIII_Nicolini
record_format	dspace
spelling	paper:paper_01480227_v107_n22_pXXXIII_Nicolini2023-06-08T15:13:03Z January and July regional climate simulation over South America Nicolini, Matilde Salio, Paola Veronica Saulo, Andrea Celeste 1620 Global Change: Climate dynamics (3309) 3309 Meteorology and Atmospheric Dynamics: Climatology (1620) 3337 Meteorology and Atmospheric Dynamics: Numerical modeling and data assimilation This work presents results, over the South American region, from the CSIRO Division of Atmospheric Research limited area model (DARLAM) and from the ninelevel general circulation model (GCM) of CSIRO (CSIRO Mk 2), within which it was nested in a one-way mode. Ten separate 30-day DARLAM simulations were performed for both January and July with a resolution of 125 km and were averaged to obtain a climatology for those months. This paper presents for the first time simulations of the January South American climate using a limited area model; previous similar studies simulated only the July climate. The goal of this study was to examine the capability of the CSIRO Mk 2 - DARLAM nested modeling system for simulating the climate in the South American region. Further, it was desired to investigate whether the higher resolution of DARLAM improves the simulated climate over various subregions, compared with the GCM and observations. With this purpose, a representative set of variables was analyzed and statistically compared. Overall, the fields simulated by the nesting system provide a better representation of the South American climate than the GCM. In particular, significant improvements are found in the nested model climatology for near-surface temperature and mean sea level pressure. Comparison of the January and July simulations shows a better wintertime performance. Some significant summertime features, like the Bolivian High, are reasonably well simulated by DARLAM, but not by the GCM. Copyright 2002 by the American Geophysical Union. Fil:Nicolini, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Salio, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Saulo, A.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2002 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01480227_v107_n22_pXXXIII_Nicolini http://hdl.handle.net/20.500.12110/paper_01480227_v107_n22_pXXXIII_Nicolini
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	1620 Global Change: Climate dynamics (3309) 3309 Meteorology and Atmospheric Dynamics: Climatology (1620) 3337 Meteorology and Atmospheric Dynamics: Numerical modeling and data assimilation
spellingShingle	1620 Global Change: Climate dynamics (3309) 3309 Meteorology and Atmospheric Dynamics: Climatology (1620) 3337 Meteorology and Atmospheric Dynamics: Numerical modeling and data assimilation Nicolini, Matilde Salio, Paola Veronica Saulo, Andrea Celeste January and July regional climate simulation over South America
topic_facet	1620 Global Change: Climate dynamics (3309) 3309 Meteorology and Atmospheric Dynamics: Climatology (1620) 3337 Meteorology and Atmospheric Dynamics: Numerical modeling and data assimilation
description	This work presents results, over the South American region, from the CSIRO Division of Atmospheric Research limited area model (DARLAM) and from the ninelevel general circulation model (GCM) of CSIRO (CSIRO Mk 2), within which it was nested in a one-way mode. Ten separate 30-day DARLAM simulations were performed for both January and July with a resolution of 125 km and were averaged to obtain a climatology for those months. This paper presents for the first time simulations of the January South American climate using a limited area model; previous similar studies simulated only the July climate. The goal of this study was to examine the capability of the CSIRO Mk 2 - DARLAM nested modeling system for simulating the climate in the South American region. Further, it was desired to investigate whether the higher resolution of DARLAM improves the simulated climate over various subregions, compared with the GCM and observations. With this purpose, a representative set of variables was analyzed and statistically compared. Overall, the fields simulated by the nesting system provide a better representation of the South American climate than the GCM. In particular, significant improvements are found in the nested model climatology for near-surface temperature and mean sea level pressure. Comparison of the January and July simulations shows a better wintertime performance. Some significant summertime features, like the Bolivian High, are reasonably well simulated by DARLAM, but not by the GCM. Copyright 2002 by the American Geophysical Union.
author	Nicolini, Matilde Salio, Paola Veronica Saulo, Andrea Celeste
author_facet	Nicolini, Matilde Salio, Paola Veronica Saulo, Andrea Celeste
author_sort	Nicolini, Matilde
title	January and July regional climate simulation over South America
title_short	January and July regional climate simulation over South America
title_full	January and July regional climate simulation over South America
title_fullStr	January and July regional climate simulation over South America
title_full_unstemmed	January and July regional climate simulation over South America
title_sort	january and july regional climate simulation over south america
publishDate	2002
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01480227_v107_n22_pXXXIII_Nicolini http://hdl.handle.net/20.500.12110/paper_01480227_v107_n22_pXXXIII_Nicolini
work_keys_str_mv	AT nicolinimatilde januaryandjulyregionalclimatesimulationoversouthamerica AT saliopaolaveronica januaryandjulyregionalclimatesimulationoversouthamerica AT sauloandreaceleste januaryandjulyregionalclimatesimulationoversouthamerica
_version_	1768545277644374016

January and July regional climate simulation over South America

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