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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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_08998418_v33_n4_p904_Blazquez https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_08998418_v33_n4_p904_Blazquez_oai |
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I28-R145-paper_08998418_v33_n4_p904_Blazquez_oai2024-08-16 Blázquez, J. Nuñez, M.N. 2013 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. application/pdf http://hdl.handle.net/20.500.12110/paper_08998418_v33_n4_p904_Blazquez info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Int. J. Climatol. 2013;33(4):904-919 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 Performance of a high resolution global model over southern South America info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_08998418_v33_n4_p904_Blazquez_oai |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-145 |
| collection |
Repositorio Digital de la Universidad de Buenos Aires (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 Blázquez, J. Nuñez, M.N. 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. |
| format |
Artículo Artículo publishedVersion |
| author |
Blázquez, J. Nuñez, M.N. |
| author_facet |
Blázquez, J. Nuñez, M.N. |
| author_sort |
Blázquez, J. |
| 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 |
http://hdl.handle.net/20.500.12110/paper_08998418_v33_n4_p904_Blazquez https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_08998418_v33_n4_p904_Blazquez_oai |
| work_keys_str_mv |
AT blazquezj performanceofahighresolutionglobalmodeloversouthernsouthamerica AT nunezmn performanceofahighresolutionglobalmodeloversouthernsouthamerica |
| _version_ |
1809357224950104064 |