Antarctic Sea Ice and the Cyclone Trajectory over the South Atlantic Ocean
Cyclones play an important role in the general circulation of the atmosphere, enabling the southern transport of heat, humidity and surplus moment from low latitudes to highlatitudes. In the South Atlantic, the most favorable areas for cyclone formation are close to the east coast of South America (...
| Published in: | Metodologias e Aprendizado |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | Portuguese |
| Published: |
Instituto Federal Catarinense
2019
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| Subjects: | |
| Online Access: | https://publicacoes.ifc.edu.br/index.php/metapre/article/view/1322 https://doi.org/10.21166/metapre.v2i0.1322 |
| Summary: | Cyclones play an important role in the general circulation of the atmosphere, enabling the southern transport of heat, humidity and surplus moment from low latitudes to highlatitudes. In the South Atlantic, the most favorable areas for cyclone formation are close to the east coast of South America (30 ° S to 45 ° S) and the Antarctic Peninsula. One of the factors that favor the formation of cyclogenesis on the east coast of South America is the temperature contrast between the South Atlantic Oceanwith the surface air layer. Whereas cyclogenesis near the Antarctic Peninsula may be associated with pre-existing baroclinic instabilities at higher levels of the atmosphere. The objective of this work is to investigate the role of the Antarctic Peninsula in the behavior of extratropical cyclones thatact on South America and adjacent oceans. For this, the TRACK algorithm was applied to track cyclones. The ocean-atmosphere interaction will be investigated through the ocean-atmosphere mode of the COAWST coupled model. The execution of TRACK proved to be satisfactory, since the results found corroborate with the literature of the region. Os ciclones desempenham um papel importante na circulação geral da atmosfera, possibilitando os transportes meridionais de calor, umidade e momento excedentes das baixas latitudes para altas latitudes. No Atlântico Sul as áreas mais favoráveis para a formação de ciclones são próximo à costa leste da América do Sul (30°S a 45°S) e Península Antártica. Um dos fatores que favorecem a formação da ciclogênese na costa leste da América do Sul é o contraste de temperatura entre o oceano Atlântico Sul com a camada de ar superficial. Enquanto que a ciclogênese próxima à Península Antártica pode estar associada a instabilidades baroclínicas pré existentes em níveis mais altos da atmosfera. O objetivo deste trabalho é investigar qual o papel da Península Antártica no comportamento dos ciclones extratropicais que atuam sobre a América do sul e oceanos adjacentes. Para tal, foi aplicado o algoritmo ... |
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