The high‐frequency variability of Antarctic sea ice and polar cold air incursions over Amazonia
Abstract The cold air incursion over South America is associated with the frontal systems generated in the Antarctic region, and sea ice cover plays an important role in its formation. Little is known about how the high‐frequency variability of the coupled ocean–cryosphere‐atmosphere system affects...
Published in: | International Journal of Climatology |
---|---|
Main Authors: | , , , |
Other Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2021
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1002/joc.7422 https://onlinelibrary.wiley.com/doi/pdf/10.1002/joc.7422 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/joc.7422 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.7422 |
id |
crwiley:10.1002/joc.7422 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1002/joc.7422 2024-06-02T07:57:08+00:00 The high‐frequency variability of Antarctic sea ice and polar cold air incursions over Amazonia Carpenedo, Camila Bertoletti Campos, José Leandro Pereira Silveira Ambrizzi, Tércio Braga, Ricardo Burgo Conselho Nacional de Desenvolvimento Científico e Tecnológico Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Fundação de Amparo à Pesquisa do Estado de São Paulo 2021 http://dx.doi.org/10.1002/joc.7422 https://onlinelibrary.wiley.com/doi/pdf/10.1002/joc.7422 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/joc.7422 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.7422 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor International Journal of Climatology volume 42, issue 6, page 3397-3407 ISSN 0899-8418 1097-0088 journal-article 2021 crwiley https://doi.org/10.1002/joc.7422 2024-05-03T11:46:53Z Abstract The cold air incursion over South America is associated with the frontal systems generated in the Antarctic region, and sea ice cover plays an important role in its formation. Little is known about how the high‐frequency variability of the coupled ocean–cryosphere‐atmosphere system affects weather conditions in South America, especially in the Amazon region ‐ in tandem with the largest tropical forest on the planet and a key region of the global climate system. The results presented here suggest that the high‐frequency variability of the expansion of Antarctic sea ice extent (SIE) extremes, in the Ross Sea and Indian Ocean, modulate the cold air incursion over the Amazon in the southern winter 4 and 2 days after the expansion of SIE extremes, respectively. The SIE extremes can couple with the atmosphere, inducing Rossby waves that propagate and undergo amplification downstream from the Ross Sea and Indian Ocean during such extremes. In this way, the atmospheric wave train acquires a more southern spread over South America, reaching tropical latitudes after the SIE extremes. In non‐SIE extreme periods, the atmospheric wave train has a more zonal spread and reaches only the extratropical latitudes of the continent. Article in Journal/Newspaper Antarc* Antarctic Ross Sea Sea ice Wiley Online Library Antarctic Indian Ross Sea The Antarctic International Journal of Climatology |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract The cold air incursion over South America is associated with the frontal systems generated in the Antarctic region, and sea ice cover plays an important role in its formation. Little is known about how the high‐frequency variability of the coupled ocean–cryosphere‐atmosphere system affects weather conditions in South America, especially in the Amazon region ‐ in tandem with the largest tropical forest on the planet and a key region of the global climate system. The results presented here suggest that the high‐frequency variability of the expansion of Antarctic sea ice extent (SIE) extremes, in the Ross Sea and Indian Ocean, modulate the cold air incursion over the Amazon in the southern winter 4 and 2 days after the expansion of SIE extremes, respectively. The SIE extremes can couple with the atmosphere, inducing Rossby waves that propagate and undergo amplification downstream from the Ross Sea and Indian Ocean during such extremes. In this way, the atmospheric wave train acquires a more southern spread over South America, reaching tropical latitudes after the SIE extremes. In non‐SIE extreme periods, the atmospheric wave train has a more zonal spread and reaches only the extratropical latitudes of the continent. |
author2 |
Conselho Nacional de Desenvolvimento Científico e Tecnológico Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Fundação de Amparo à Pesquisa do Estado de São Paulo |
format |
Article in Journal/Newspaper |
author |
Carpenedo, Camila Bertoletti Campos, José Leandro Pereira Silveira Ambrizzi, Tércio Braga, Ricardo Burgo |
spellingShingle |
Carpenedo, Camila Bertoletti Campos, José Leandro Pereira Silveira Ambrizzi, Tércio Braga, Ricardo Burgo The high‐frequency variability of Antarctic sea ice and polar cold air incursions over Amazonia |
author_facet |
Carpenedo, Camila Bertoletti Campos, José Leandro Pereira Silveira Ambrizzi, Tércio Braga, Ricardo Burgo |
author_sort |
Carpenedo, Camila Bertoletti |
title |
The high‐frequency variability of Antarctic sea ice and polar cold air incursions over Amazonia |
title_short |
The high‐frequency variability of Antarctic sea ice and polar cold air incursions over Amazonia |
title_full |
The high‐frequency variability of Antarctic sea ice and polar cold air incursions over Amazonia |
title_fullStr |
The high‐frequency variability of Antarctic sea ice and polar cold air incursions over Amazonia |
title_full_unstemmed |
The high‐frequency variability of Antarctic sea ice and polar cold air incursions over Amazonia |
title_sort |
high‐frequency variability of antarctic sea ice and polar cold air incursions over amazonia |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1002/joc.7422 https://onlinelibrary.wiley.com/doi/pdf/10.1002/joc.7422 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/joc.7422 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.7422 |
geographic |
Antarctic Indian Ross Sea The Antarctic |
geographic_facet |
Antarctic Indian Ross Sea The Antarctic |
genre |
Antarc* Antarctic Ross Sea Sea ice |
genre_facet |
Antarc* Antarctic Ross Sea Sea ice |
op_source |
International Journal of Climatology volume 42, issue 6, page 3397-3407 ISSN 0899-8418 1097-0088 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/joc.7422 |
container_title |
International Journal of Climatology |
_version_ |
1800739047198425088 |