A new global coupled atmosphere-ocean wavenumber-4 pattern in Southern mid–latitudes during austral summer and its climate linkage
A new pattern referred to as the coupled ocean-atmosphere wavenumber-4 (COAW4) pattern has been identified in the Southern mid-latitudes during austral summer. This pattern consists of a wavenumber-4 pattern in the anomalous 200-hPa meridional wind and a wavenumber-4 pattern of the anomalous sea sur...
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IOP Publishing
2023
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Online Access: | https://doi.org/10.1088/2515-7620/acde4d https://doaj.org/article/c2af24ecf71e4ffa88be0a5fb0485915 |
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ftdoajarticles:oai:doaj.org/article:c2af24ecf71e4ffa88be0a5fb0485915 2023-07-16T03:52:27+02:00 A new global coupled atmosphere-ocean wavenumber-4 pattern in Southern mid–latitudes during austral summer and its climate linkage Lejiang Yu Shiyuan Zhong Cuijuan Sui Bo Sun 2023-01-01T00:00:00Z https://doi.org/10.1088/2515-7620/acde4d https://doaj.org/article/c2af24ecf71e4ffa88be0a5fb0485915 EN eng IOP Publishing https://doi.org/10.1088/2515-7620/acde4d https://doaj.org/toc/2515-7620 doi:10.1088/2515-7620/acde4d 2515-7620 https://doaj.org/article/c2af24ecf71e4ffa88be0a5fb0485915 Environmental Research Communications, Vol 5, Iss 6, p 061003 (2023) global atmosphere-ocean wavenumber-4 the Indian Ocean subtropical dipole (IOSD) the South Atlantic subtropical dipole (SASD) the South Pacific subtropical dipole (SPSD) Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2023 ftdoajarticles https://doi.org/10.1088/2515-7620/acde4d 2023-06-25T00:35:22Z A new pattern referred to as the coupled ocean-atmosphere wavenumber-4 (COAW4) pattern has been identified in the Southern mid-latitudes during austral summer. This pattern consists of a wavenumber-4 pattern in the anomalous 200-hPa meridional wind and a wavenumber-4 pattern of the anomalous sea surface temperature (SST). The SST component of the COAW4 pattern, which includes the Indian Ocean Subtropical Dipole (IOSD), the South Atlantic Subtropical Dipole (SASD) and the South Pacific Subtropical Dipole (SPSD), develops through air-sea interactions involving surface turbulent heat flux, surface wind, and ocean mixed-layer depth. The atmospheric component displays a barotropic structure. The sources for COAW4 pattern include not only the wavenumber-4 pattern of the anomalous SST over Southern oceans, but also the anomalous convective activities over Southern land areas. The COAW4 pattern is associated with increased precipitation over land in southern mid-latitudes, particularly in central Australia. Furthermore, the COAW4 pattern is linked to Antarctic sea ice cover in the Weddell, Amundsen, and northern Ross Seas. Plain language summary In the southern mid-latitudes, there exists a wavenumber 4 pattern in the anomalous 200-hPa meridional wind and a wavenumber-4 pattern of the anomalous sea surface temperature (SST). Previous studies have examined the two wavenumber-4 patterns separately, but their potential linkage remains largely unknown. Through statistical analyses of SST and atmospheric global data, we demonstrated that the two wavenumber 4 patterns could be integrated into a coupled ocean-atmosphere wavenumber-4 (COAW4) pattern in Southern mid-latitudes in austral summer. Additionally, we have investigated the sources of this pattern as well as its effect on precipitation over southern lands and on Antarctic sea ice. Article in Journal/Newspaper Antarc* Antarctic Sea ice Directory of Open Access Journals: DOAJ Articles Antarctic Austral Indian Pacific Weddell Environmental Research Communications 5 6 061003 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
global atmosphere-ocean wavenumber-4 the Indian Ocean subtropical dipole (IOSD) the South Atlantic subtropical dipole (SASD) the South Pacific subtropical dipole (SPSD) Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
global atmosphere-ocean wavenumber-4 the Indian Ocean subtropical dipole (IOSD) the South Atlantic subtropical dipole (SASD) the South Pacific subtropical dipole (SPSD) Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Lejiang Yu Shiyuan Zhong Cuijuan Sui Bo Sun A new global coupled atmosphere-ocean wavenumber-4 pattern in Southern mid–latitudes during austral summer and its climate linkage |
topic_facet |
global atmosphere-ocean wavenumber-4 the Indian Ocean subtropical dipole (IOSD) the South Atlantic subtropical dipole (SASD) the South Pacific subtropical dipole (SPSD) Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
A new pattern referred to as the coupled ocean-atmosphere wavenumber-4 (COAW4) pattern has been identified in the Southern mid-latitudes during austral summer. This pattern consists of a wavenumber-4 pattern in the anomalous 200-hPa meridional wind and a wavenumber-4 pattern of the anomalous sea surface temperature (SST). The SST component of the COAW4 pattern, which includes the Indian Ocean Subtropical Dipole (IOSD), the South Atlantic Subtropical Dipole (SASD) and the South Pacific Subtropical Dipole (SPSD), develops through air-sea interactions involving surface turbulent heat flux, surface wind, and ocean mixed-layer depth. The atmospheric component displays a barotropic structure. The sources for COAW4 pattern include not only the wavenumber-4 pattern of the anomalous SST over Southern oceans, but also the anomalous convective activities over Southern land areas. The COAW4 pattern is associated with increased precipitation over land in southern mid-latitudes, particularly in central Australia. Furthermore, the COAW4 pattern is linked to Antarctic sea ice cover in the Weddell, Amundsen, and northern Ross Seas. Plain language summary In the southern mid-latitudes, there exists a wavenumber 4 pattern in the anomalous 200-hPa meridional wind and a wavenumber-4 pattern of the anomalous sea surface temperature (SST). Previous studies have examined the two wavenumber-4 patterns separately, but their potential linkage remains largely unknown. Through statistical analyses of SST and atmospheric global data, we demonstrated that the two wavenumber 4 patterns could be integrated into a coupled ocean-atmosphere wavenumber-4 (COAW4) pattern in Southern mid-latitudes in austral summer. Additionally, we have investigated the sources of this pattern as well as its effect on precipitation over southern lands and on Antarctic sea ice. |
format |
Article in Journal/Newspaper |
author |
Lejiang Yu Shiyuan Zhong Cuijuan Sui Bo Sun |
author_facet |
Lejiang Yu Shiyuan Zhong Cuijuan Sui Bo Sun |
author_sort |
Lejiang Yu |
title |
A new global coupled atmosphere-ocean wavenumber-4 pattern in Southern mid–latitudes during austral summer and its climate linkage |
title_short |
A new global coupled atmosphere-ocean wavenumber-4 pattern in Southern mid–latitudes during austral summer and its climate linkage |
title_full |
A new global coupled atmosphere-ocean wavenumber-4 pattern in Southern mid–latitudes during austral summer and its climate linkage |
title_fullStr |
A new global coupled atmosphere-ocean wavenumber-4 pattern in Southern mid–latitudes during austral summer and its climate linkage |
title_full_unstemmed |
A new global coupled atmosphere-ocean wavenumber-4 pattern in Southern mid–latitudes during austral summer and its climate linkage |
title_sort |
new global coupled atmosphere-ocean wavenumber-4 pattern in southern mid–latitudes during austral summer and its climate linkage |
publisher |
IOP Publishing |
publishDate |
2023 |
url |
https://doi.org/10.1088/2515-7620/acde4d https://doaj.org/article/c2af24ecf71e4ffa88be0a5fb0485915 |
geographic |
Antarctic Austral Indian Pacific Weddell |
geographic_facet |
Antarctic Austral Indian Pacific Weddell |
genre |
Antarc* Antarctic Sea ice |
genre_facet |
Antarc* Antarctic Sea ice |
op_source |
Environmental Research Communications, Vol 5, Iss 6, p 061003 (2023) |
op_relation |
https://doi.org/10.1088/2515-7620/acde4d https://doaj.org/toc/2515-7620 doi:10.1088/2515-7620/acde4d 2515-7620 https://doaj.org/article/c2af24ecf71e4ffa88be0a5fb0485915 |
op_doi |
https://doi.org/10.1088/2515-7620/acde4d |
container_title |
Environmental Research Communications |
container_volume |
5 |
container_issue |
6 |
container_start_page |
061003 |
_version_ |
1771545699892068352 |