The Representation of the Southern Annular Mode Signal in the Brazilian Earth System Model
The Southern Annular Mode (SAM, also known as the Antarctic Oscillation—AAO) explains most of the climate variability in the Southern Hemisphere. A ring pattern in mean sea level pressure (MSLP) or 500 hPa geopotential height around Antarctica characterizes SAM. Differences of MSLP values between SH...
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ftmdpi:oai:mdpi.com:/2073-4433/12/8/1045/ 2023-08-20T04:01:52+02:00 The Representation of the Southern Annular Mode Signal in the Brazilian Earth System Model Luciana F. Prado Ilana Wainer Ronald B. de Souza agris 2021-08-14 application/pdf https://doi.org/10.3390/atmos12081045 EN eng Multidisciplinary Digital Publishing Institute Biosphere/Hydrosphere/Land–Atmosphere Interactions https://dx.doi.org/10.3390/atmos12081045 https://creativecommons.org/licenses/by/4.0/ Atmosphere; Volume 12; Issue 8; Pages: 1045 Southern Annular Mode model evaluation mean sea level pressure temperature precipitation South America Text 2021 ftmdpi https://doi.org/10.3390/atmos12081045 2023-08-01T02:26:23Z The Southern Annular Mode (SAM, also known as the Antarctic Oscillation—AAO) explains most of the climate variability in the Southern Hemisphere. A ring pattern in mean sea level pressure (MSLP) or 500 hPa geopotential height around Antarctica characterizes SAM. Differences of MSLP values between SH mid and high latitudes define positive and negative SAM phases with impacts on mean atmospheric circulation. Thus, investigating how different models represent SAM is of paramount importance, as it can improve their ability to describe or even predict most of the SH climate variability. Here we examine how the Brazilian Earth System Model (BESM) represents SAM’s signal compared with observations, reanalysis, and other climate models contributing to the Coupled Modeling Intercomparison Project version 5 (CMIP5). We also evaluate how SAM relates to the South American surface temperature and precipitation and discuss the models’ limitations and biases compared with reanalysis data. Text Antarc* Antarctic Antarctica MDPI Open Access Publishing Antarctic The Antarctic Atmosphere 12 8 1045 |
institution |
Open Polar |
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MDPI Open Access Publishing |
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ftmdpi |
language |
English |
topic |
Southern Annular Mode model evaluation mean sea level pressure temperature precipitation South America |
spellingShingle |
Southern Annular Mode model evaluation mean sea level pressure temperature precipitation South America Luciana F. Prado Ilana Wainer Ronald B. de Souza The Representation of the Southern Annular Mode Signal in the Brazilian Earth System Model |
topic_facet |
Southern Annular Mode model evaluation mean sea level pressure temperature precipitation South America |
description |
The Southern Annular Mode (SAM, also known as the Antarctic Oscillation—AAO) explains most of the climate variability in the Southern Hemisphere. A ring pattern in mean sea level pressure (MSLP) or 500 hPa geopotential height around Antarctica characterizes SAM. Differences of MSLP values between SH mid and high latitudes define positive and negative SAM phases with impacts on mean atmospheric circulation. Thus, investigating how different models represent SAM is of paramount importance, as it can improve their ability to describe or even predict most of the SH climate variability. Here we examine how the Brazilian Earth System Model (BESM) represents SAM’s signal compared with observations, reanalysis, and other climate models contributing to the Coupled Modeling Intercomparison Project version 5 (CMIP5). We also evaluate how SAM relates to the South American surface temperature and precipitation and discuss the models’ limitations and biases compared with reanalysis data. |
format |
Text |
author |
Luciana F. Prado Ilana Wainer Ronald B. de Souza |
author_facet |
Luciana F. Prado Ilana Wainer Ronald B. de Souza |
author_sort |
Luciana F. Prado |
title |
The Representation of the Southern Annular Mode Signal in the Brazilian Earth System Model |
title_short |
The Representation of the Southern Annular Mode Signal in the Brazilian Earth System Model |
title_full |
The Representation of the Southern Annular Mode Signal in the Brazilian Earth System Model |
title_fullStr |
The Representation of the Southern Annular Mode Signal in the Brazilian Earth System Model |
title_full_unstemmed |
The Representation of the Southern Annular Mode Signal in the Brazilian Earth System Model |
title_sort |
representation of the southern annular mode signal in the brazilian earth system model |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/atmos12081045 |
op_coverage |
agris |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Atmosphere; Volume 12; Issue 8; Pages: 1045 |
op_relation |
Biosphere/Hydrosphere/Land–Atmosphere Interactions https://dx.doi.org/10.3390/atmos12081045 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/atmos12081045 |
container_title |
Atmosphere |
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12 |
container_issue |
8 |
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1045 |
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1774712238262714368 |