Influence of high and low pressure systems and Sea Surface Temperature of South Atlantic in the development of Mesoscale Convective Systems in Rio Grande do Sul
In this work the influences of the positioning of high and low pressures systems centers at South Atlantic Ocean and Sea Surface Temperature (SST) anomalies of Atlantic and Pacific Oceans are analysed in association to the occurrence of Mesoscale Convective Systems (MCS) in Rio Grande do Sul (RS) St...
Main Authors: | , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | Portuguese |
Published: |
Universidade Federal do Rio de Janeiro
2007
|
Subjects: | |
Online Access: | https://revistas.ufrj.br/index.php/aigeo/article/view/6766 |
id |
ftufriodejaneiro:oai:ojs.pkp.sfu.ca:article/6766 |
---|---|
record_format |
openpolar |
spelling |
ftufriodejaneiro:oai:ojs.pkp.sfu.ca:article/6766 2024-09-09T20:08:51+00:00 Influence of high and low pressure systems and Sea Surface Temperature of South Atlantic in the development of Mesoscale Convective Systems in Rio Grande do Sul Influência dos sistemas de altas e baixas pressões e da Temperatura da Superfície do Mar do Atlântico Sul no desenvolvimento de Sistemas Convectivos de Mesoescala sobre o Rio Grande do Sul Scaglioni, Taís Pegoraro Gomes, Roseli Gueths Marques, Julio Renato Quevedo 2007-12-01 application/pdf https://revistas.ufrj.br/index.php/aigeo/article/view/6766 por por Universidade Federal do Rio de Janeiro https://revistas.ufrj.br/index.php/aigeo/article/view/6766/5363 https://revistas.ufrj.br/index.php/aigeo/article/view/6766 Copyright (c) 2007 Anuário do Instituto de Geociências Anuário do Instituto de Geociências; v. 30 n. 2 (2007); 31-44 Anuário do Instituto de Geociências; Vol. 30 No. 2 (2007); 31-44 1982-3908 0101-9759 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2007 ftufriodejaneiro 2024-06-24T04:23:31Z In this work the influences of the positioning of high and low pressures systems centers at South Atlantic Ocean and Sea Surface Temperature (SST) anomalies of Atlantic and Pacific Oceans are analysed in association to the occurrence of Mesoscale Convective Systems (MCS) in Rio Grande do Sul (RS) State. The selected period involves four years of February (2002-2005). It was utilized geostationary satellite imagery, values of Sea Surface Temperature (SST) anomalies of the Atlantic and Pacific Oceans and pluviometric precipitation data observed on the State. The horizontal fields of atmospheric pressure and streamslines were obtained from simulations made with the mesoscale model MM5. The results showed that for the analysed period there was one rainy February in the State and three months of drought. For the drought months, the number of observed MCS was inferior, up to six times, to the observed one in the rainy month. Still, in the dry months, the MCS presented shorter duration in relation to the ones observed in the rainy February. For all the analysed period, the MCS dissipation occurred to the east of its position of formation, in the majority of the cases. Although the differences found between all the analysed MCS, the preferential time in which they formed, 12 and 18 UTC, predominated in all period. The large scale and mesoscale circulation patterns had shown that in the rainy month, the centers of subtropical high pressure systems located on the Atlantic Ocean were positioned near the SSA coast, where the SST anomalies values were positive. The opposite were observed during the drought months. Neste trabalho são analisadas as influências dos posicionamentos dos centros dos sistemas de altas e de baixas pressões no Oceano Atlântico Sul e das anomalias de Temperatura da Superfície do Mar (TSM) dos Oceanos Atlântico e Pacífico em associação com a ocorrência de Sistemas Convectivos de Mesoescala (SCM) no Estado do Rio Grande do Sul (RS). O período selecionado compreende o mês de fevereiro de quatro anos ... Article in Journal/Newspaper South Atlantic Ocean Portal de Periódicos da UFRJ (Universidade Federal do Rio de Janeiro) Pacific |
institution |
Open Polar |
collection |
Portal de Periódicos da UFRJ (Universidade Federal do Rio de Janeiro) |
op_collection_id |
ftufriodejaneiro |
language |
Portuguese |
description |
In this work the influences of the positioning of high and low pressures systems centers at South Atlantic Ocean and Sea Surface Temperature (SST) anomalies of Atlantic and Pacific Oceans are analysed in association to the occurrence of Mesoscale Convective Systems (MCS) in Rio Grande do Sul (RS) State. The selected period involves four years of February (2002-2005). It was utilized geostationary satellite imagery, values of Sea Surface Temperature (SST) anomalies of the Atlantic and Pacific Oceans and pluviometric precipitation data observed on the State. The horizontal fields of atmospheric pressure and streamslines were obtained from simulations made with the mesoscale model MM5. The results showed that for the analysed period there was one rainy February in the State and three months of drought. For the drought months, the number of observed MCS was inferior, up to six times, to the observed one in the rainy month. Still, in the dry months, the MCS presented shorter duration in relation to the ones observed in the rainy February. For all the analysed period, the MCS dissipation occurred to the east of its position of formation, in the majority of the cases. Although the differences found between all the analysed MCS, the preferential time in which they formed, 12 and 18 UTC, predominated in all period. The large scale and mesoscale circulation patterns had shown that in the rainy month, the centers of subtropical high pressure systems located on the Atlantic Ocean were positioned near the SSA coast, where the SST anomalies values were positive. The opposite were observed during the drought months. Neste trabalho são analisadas as influências dos posicionamentos dos centros dos sistemas de altas e de baixas pressões no Oceano Atlântico Sul e das anomalias de Temperatura da Superfície do Mar (TSM) dos Oceanos Atlântico e Pacífico em associação com a ocorrência de Sistemas Convectivos de Mesoescala (SCM) no Estado do Rio Grande do Sul (RS). O período selecionado compreende o mês de fevereiro de quatro anos ... |
format |
Article in Journal/Newspaper |
author |
Scaglioni, Taís Pegoraro Gomes, Roseli Gueths Marques, Julio Renato Quevedo |
spellingShingle |
Scaglioni, Taís Pegoraro Gomes, Roseli Gueths Marques, Julio Renato Quevedo Influence of high and low pressure systems and Sea Surface Temperature of South Atlantic in the development of Mesoscale Convective Systems in Rio Grande do Sul |
author_facet |
Scaglioni, Taís Pegoraro Gomes, Roseli Gueths Marques, Julio Renato Quevedo |
author_sort |
Scaglioni, Taís Pegoraro |
title |
Influence of high and low pressure systems and Sea Surface Temperature of South Atlantic in the development of Mesoscale Convective Systems in Rio Grande do Sul |
title_short |
Influence of high and low pressure systems and Sea Surface Temperature of South Atlantic in the development of Mesoscale Convective Systems in Rio Grande do Sul |
title_full |
Influence of high and low pressure systems and Sea Surface Temperature of South Atlantic in the development of Mesoscale Convective Systems in Rio Grande do Sul |
title_fullStr |
Influence of high and low pressure systems and Sea Surface Temperature of South Atlantic in the development of Mesoscale Convective Systems in Rio Grande do Sul |
title_full_unstemmed |
Influence of high and low pressure systems and Sea Surface Temperature of South Atlantic in the development of Mesoscale Convective Systems in Rio Grande do Sul |
title_sort |
influence of high and low pressure systems and sea surface temperature of south atlantic in the development of mesoscale convective systems in rio grande do sul |
publisher |
Universidade Federal do Rio de Janeiro |
publishDate |
2007 |
url |
https://revistas.ufrj.br/index.php/aigeo/article/view/6766 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
Anuário do Instituto de Geociências; v. 30 n. 2 (2007); 31-44 Anuário do Instituto de Geociências; Vol. 30 No. 2 (2007); 31-44 1982-3908 0101-9759 |
op_relation |
https://revistas.ufrj.br/index.php/aigeo/article/view/6766/5363 https://revistas.ufrj.br/index.php/aigeo/article/view/6766 |
op_rights |
Copyright (c) 2007 Anuário do Instituto de Geociências |
_version_ |
1809942930071224320 |