Performance of a high resolution global model over southern South America

This paper evaluates a present climate simulation over southern South America performed with the Meteorological Research Institute/Japanese Meteorological Agency (MRI/JMA) high resolution global model. Main patterns of low and upper-level atmospheric circulation were analysed in a 25-year simulation...

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Autores principales:	Blazquez, Josefina, Nuñez, Mario Néstor
Publicado:	2013
Materias:	Global model Present climate Southern South America Validation Annual cycle Argentina Atmospheric circulation Atmospheric circulation patterns Austral summers Austral winter Climate simulation Global models High resolution Interannual variability Meteorological agency Meteorological research institutes Mountainous area Precipitation trends Southern south america Spatial structure Surface variables Temperature trends Temperature variability Climatology Computer simulation Lasers Space applications Climate models air temperature annual variation atmospheric circulation climate modeling global climate numerical model performance assessment precipitation assessment trend analysis Brazil
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08998418_v33_n4_p904_Blazquez http://hdl.handle.net/20.500.12110/paper_08998418_v33_n4_p904_Blazquez
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_08998418_v33_n4_p904_Blazquez
record_format	dspace
spelling	paper:paper_08998418_v33_n4_p904_Blazquez2023-06-08T15:49:43Z Performance of a high resolution global model over southern South America Blazquez, Josefina Nuñez, Mario Néstor Global model Present climate Southern South America Validation Annual cycle Argentina Atmospheric circulation Atmospheric circulation patterns Austral summers Austral winter Climate simulation Global models High resolution Interannual variability Meteorological agency Meteorological research institutes Mountainous area Precipitation trends Present climate Southern south america Spatial structure Surface variables Temperature trends Temperature variability Validation Climatology Computer simulation Lasers Space applications Climate models air temperature annual variation atmospheric circulation climate modeling global climate numerical model performance assessment precipitation assessment trend analysis Argentina Brazil This paper evaluates a present climate simulation over southern South America performed with the Meteorological Research Institute/Japanese Meteorological Agency (MRI/JMA) high resolution global model. Main patterns of low and upper-level atmospheric circulation were analysed in a 25-year simulation as well as climate means, interannual variability, trends and bias of temperature and precipitation. The model is able to reproduce the main atmospheric circulation patterns and mean surface variables, although some deficiencies were found such as an overestimation of temperature over central Argentina in most of seasons, an overestimation of austral winter precipitation over northeastern and central Argentina, an underestimation of precipitation in all the seasons over southeast of Brazil, an underestimation of the amplitude of the annual cycle temperature in some regions and an overestimation of the amplitude of the annual cycle of precipitation over mountainous areas. Model interannual variability was also assessed. In general, temperature variability is overestimated, whereas precipitation is underestimated. The spatial structure of the year-to-year variability of precipitation is correctly simulated by the model, although some patterns were misplaced. Most of regions present a cold seasonal bias reaching values of - 2 °C in some regions. It was found that precipitation biases are between 3 and - 1 mm day-1. In some regions and seasons observed and simulated temperature trends coincide, as in austral summer or spring, where the model and the observations show positive trends in most of regions. However, there is no agreement between observed and simulated precipitation trends in almost all the regions and seasons. © 2012 Royal Meteorological Society. Fil:Blázquez, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Nuñez, M.N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08998418_v33_n4_p904_Blazquez http://hdl.handle.net/20.500.12110/paper_08998418_v33_n4_p904_Blazquez
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Global model Present climate Southern South America Validation Annual cycle Argentina Atmospheric circulation Atmospheric circulation patterns Austral summers Austral winter Climate simulation Global models High resolution Interannual variability Meteorological agency Meteorological research institutes Mountainous area Precipitation trends Present climate Southern south america Spatial structure Surface variables Temperature trends Temperature variability Validation Climatology Computer simulation Lasers Space applications Climate models air temperature annual variation atmospheric circulation climate modeling global climate numerical model performance assessment precipitation assessment trend analysis Argentina Brazil
spellingShingle	Global model Present climate Southern South America Validation Annual cycle Argentina Atmospheric circulation Atmospheric circulation patterns Austral summers Austral winter Climate simulation Global models High resolution Interannual variability Meteorological agency Meteorological research institutes Mountainous area Precipitation trends Present climate Southern south america Spatial structure Surface variables Temperature trends Temperature variability Validation Climatology Computer simulation Lasers Space applications Climate models air temperature annual variation atmospheric circulation climate modeling global climate numerical model performance assessment precipitation assessment trend analysis Argentina Brazil Blazquez, Josefina Nuñez, Mario Néstor Performance of a high resolution global model over southern South America
topic_facet	Global model Present climate Southern South America Validation Annual cycle Argentina Atmospheric circulation Atmospheric circulation patterns Austral summers Austral winter Climate simulation Global models High resolution Interannual variability Meteorological agency Meteorological research institutes Mountainous area Precipitation trends Present climate Southern south america Spatial structure Surface variables Temperature trends Temperature variability Validation Climatology Computer simulation Lasers Space applications Climate models air temperature annual variation atmospheric circulation climate modeling global climate numerical model performance assessment precipitation assessment trend analysis Argentina Brazil
description	This paper evaluates a present climate simulation over southern South America performed with the Meteorological Research Institute/Japanese Meteorological Agency (MRI/JMA) high resolution global model. Main patterns of low and upper-level atmospheric circulation were analysed in a 25-year simulation as well as climate means, interannual variability, trends and bias of temperature and precipitation. The model is able to reproduce the main atmospheric circulation patterns and mean surface variables, although some deficiencies were found such as an overestimation of temperature over central Argentina in most of seasons, an overestimation of austral winter precipitation over northeastern and central Argentina, an underestimation of precipitation in all the seasons over southeast of Brazil, an underestimation of the amplitude of the annual cycle temperature in some regions and an overestimation of the amplitude of the annual cycle of precipitation over mountainous areas. Model interannual variability was also assessed. In general, temperature variability is overestimated, whereas precipitation is underestimated. The spatial structure of the year-to-year variability of precipitation is correctly simulated by the model, although some patterns were misplaced. Most of regions present a cold seasonal bias reaching values of - 2 °C in some regions. It was found that precipitation biases are between 3 and - 1 mm day-1. In some regions and seasons observed and simulated temperature trends coincide, as in austral summer or spring, where the model and the observations show positive trends in most of regions. However, there is no agreement between observed and simulated precipitation trends in almost all the regions and seasons. © 2012 Royal Meteorological Society.
author	Blazquez, Josefina Nuñez, Mario Néstor
author_facet	Blazquez, Josefina Nuñez, Mario Néstor
author_sort	Blazquez, Josefina
title	Performance of a high resolution global model over southern South America
title_short	Performance of a high resolution global model over southern South America
title_full	Performance of a high resolution global model over southern South America
title_fullStr	Performance of a high resolution global model over southern South America
title_full_unstemmed	Performance of a high resolution global model over southern South America
title_sort	performance of a high resolution global model over southern south america
publishDate	2013
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08998418_v33_n4_p904_Blazquez http://hdl.handle.net/20.500.12110/paper_08998418_v33_n4_p904_Blazquez
work_keys_str_mv	AT blazquezjosefina performanceofahighresolutionglobalmodeloversouthernsouthamerica AT nunezmarionestor performanceofahighresolutionglobalmodeloversouthernsouthamerica
_version_	1768543041905229824

Performance of a high resolution global model over southern South America

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