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...
Main Author: | |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2004
|
Subjects: | |
Online Access: | https://doi.org/10.7916/dhb4-bz25 |
id |
ftcolumbiauniv:oai:academiccommons.columbia.edu:10.7916/dhb4-bz25 |
---|---|
record_format |
openpolar |
spelling |
ftcolumbiauniv:oai:academiccommons.columbia.edu:10.7916/dhb4-bz25 2023-10-09T21:44:45+02:00 ENSO-related impacts on Antarctic sea ice: a synthesis of phenomenon and mechanisms Yuan, Xiaojun 2004 https://doi.org/10.7916/dhb4-bz25 English eng https://doi.org/10.7916/dhb4-bz25 Sea ice Heat flux Teleconnections (Climatology) Jet stream Rossby waves Meridional overturning circulation Southern oscillation Climatology Articles 2004 ftcolumbiauniv https://doi.org/10.7916/dhb4-bz25 2023-09-09T22:20:51Z 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 Sea ice Columbia University: Academic Commons Antarctic The Antarctic Pacific |
institution |
Open Polar |
collection |
Columbia University: Academic Commons |
op_collection_id |
ftcolumbiauniv |
language |
English |
topic |
Sea ice Heat flux Teleconnections (Climatology) Jet stream Rossby waves Meridional overturning circulation Southern oscillation Climatology |
spellingShingle |
Sea ice Heat flux Teleconnections (Climatology) Jet stream Rossby waves Meridional overturning circulation Southern oscillation Climatology Yuan, Xiaojun ENSO-related impacts on Antarctic sea ice: a synthesis of phenomenon and mechanisms |
topic_facet |
Sea ice Heat flux Teleconnections (Climatology) Jet stream Rossby waves Meridional overturning circulation Southern oscillation Climatology |
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 |
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 |
publishDate |
2004 |
url |
https://doi.org/10.7916/dhb4-bz25 |
geographic |
Antarctic The Antarctic Pacific |
geographic_facet |
Antarctic The Antarctic Pacific |
genre |
Antarc* Antarctic Sea ice |
genre_facet |
Antarc* Antarctic Sea ice |
op_relation |
https://doi.org/10.7916/dhb4-bz25 |
op_doi |
https://doi.org/10.7916/dhb4-bz25 |
_version_ |
1779313406811045888 |