ENSO-related impacts on Antarctic sea ice: a synthesis of phenomenon and mechanisms
Many remote and local climate variabilities influence Antarctic sea ice at different time scales. The strongest sea ice teleconnection at the interannual time scale was found between El Niño–Southern Oscillation (ENSO) events and a high latitude climate mode named the Antarctic Dipole. The Antarctic...
Published in: | Antarctic Science |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2004
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s0954102004002238 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102004002238 |
id |
crcambridgeupr:10.1017/s0954102004002238 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s0954102004002238 2024-09-30T14:24:35+00:00 ENSO-related impacts on Antarctic sea ice: a synthesis of phenomenon and mechanisms YUAN, XIAOJUN 2004 http://dx.doi.org/10.1017/s0954102004002238 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102004002238 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 16, issue 4, page 415-425 ISSN 0954-1020 1365-2079 journal-article 2004 crcambridgeupr https://doi.org/10.1017/s0954102004002238 2024-09-18T04:04:00Z Many remote and local climate variabilities influence Antarctic sea ice at different time scales. The strongest sea ice teleconnection at the interannual time scale was found between El Niño–Southern Oscillation (ENSO) events and a high latitude climate mode named the Antarctic Dipole. The Antarctic Dipole is characterized by an out-of-phase relationship between sea ice and surface temperature anomalies in the South Pacific and South Atlantic, manifesting itself and persisting 3–4 seasons after being triggered by the ENSO forcing. This study examines the life cycles of ENSO warm and cold events in the tropics and associated evolution of the ADP in high latitudes of the Southern Hemisphere. In evaluating the mechanisms that form the ADP, the study suggests a synthesized scheme that links these high latitude processes with ENSO teleconnection in both the Pacific and Atlantic basins. The synthesized scheme suggests that the two main mechanisms responsible for the formation/maintenance of the Antarctic Dipole are the heat flux due to the mean meridional circulation of the regional Ferrel Cell and regional anomalous circulation generated by stationary eddies. The changes in the Hadley Cell, the jet stream in the subtropics, and the Rossby Wave train associated with ENSO link the tropical forcing to these high latitude processes. Moreover, these two mechanisms operate in phase and are comparable in magnitude. The positive feedback between the jet stream and stationary eddies in the atmosphere, the positive feedback within the air-sea-ice system, and the seasonality all reinforce the anomalies, resulting in persistent Antarctic Dipole anomalies. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Sea ice Cambridge University Press Antarctic The Antarctic Pacific Antarctic Science 16 4 415 425 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Many remote and local climate variabilities influence Antarctic sea ice at different time scales. The strongest sea ice teleconnection at the interannual time scale was found between El Niño–Southern Oscillation (ENSO) events and a high latitude climate mode named the Antarctic Dipole. The Antarctic Dipole is characterized by an out-of-phase relationship between sea ice and surface temperature anomalies in the South Pacific and South Atlantic, manifesting itself and persisting 3–4 seasons after being triggered by the ENSO forcing. This study examines the life cycles of ENSO warm and cold events in the tropics and associated evolution of the ADP in high latitudes of the Southern Hemisphere. In evaluating the mechanisms that form the ADP, the study suggests a synthesized scheme that links these high latitude processes with ENSO teleconnection in both the Pacific and Atlantic basins. The synthesized scheme suggests that the two main mechanisms responsible for the formation/maintenance of the Antarctic Dipole are the heat flux due to the mean meridional circulation of the regional Ferrel Cell and regional anomalous circulation generated by stationary eddies. The changes in the Hadley Cell, the jet stream in the subtropics, and the Rossby Wave train associated with ENSO link the tropical forcing to these high latitude processes. Moreover, these two mechanisms operate in phase and are comparable in magnitude. The positive feedback between the jet stream and stationary eddies in the atmosphere, the positive feedback within the air-sea-ice system, and the seasonality all reinforce the anomalies, resulting in persistent Antarctic Dipole anomalies. |
format |
Article in Journal/Newspaper |
author |
YUAN, XIAOJUN |
spellingShingle |
YUAN, XIAOJUN ENSO-related impacts on Antarctic sea ice: a synthesis of phenomenon and mechanisms |
author_facet |
YUAN, XIAOJUN |
author_sort |
YUAN, XIAOJUN |
title |
ENSO-related impacts on Antarctic sea ice: a synthesis of phenomenon and mechanisms |
title_short |
ENSO-related impacts on Antarctic sea ice: a synthesis of phenomenon and mechanisms |
title_full |
ENSO-related impacts on Antarctic sea ice: a synthesis of phenomenon and mechanisms |
title_fullStr |
ENSO-related impacts on Antarctic sea ice: a synthesis of phenomenon and mechanisms |
title_full_unstemmed |
ENSO-related impacts on Antarctic sea ice: a synthesis of phenomenon and mechanisms |
title_sort |
enso-related impacts on antarctic sea ice: a synthesis of phenomenon and mechanisms |
publisher |
Cambridge University Press (CUP) |
publishDate |
2004 |
url |
http://dx.doi.org/10.1017/s0954102004002238 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102004002238 |
geographic |
Antarctic The Antarctic Pacific |
geographic_facet |
Antarctic The Antarctic Pacific |
genre |
Antarc* Antarctic Antarctic Science Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Science Sea ice |
op_source |
Antarctic Science volume 16, issue 4, page 415-425 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102004002238 |
container_title |
Antarctic Science |
container_volume |
16 |
container_issue |
4 |
container_start_page |
415 |
op_container_end_page |
425 |
_version_ |
1811641572062658560 |