ANTARCTIC SEA-ICE OSCILLATION AND ITS
RELATIONSHIP WITH ENSO

Cheng Yanjie; Bian Lingen; Lu Longhua

Vol.13, NO.6, 2002

Article Contents

Article Navigation > Journal of Applied Meteorological Science > 2002 > 13(6): 711-717

Cheng Yanjie, Bian Lingen, Lu Longhua. Antarctic sea-ice oscillation and itsrelationship with ENSO. J Appl Meteor Sci, 2002, 13(6): 711-717.

Citation:

Cheng Yanjie, Bian Lingen, Lu Longhua. Antarctic sea-ice oscillation and itsrelationship with ENSO. J Appl Meteor Sci, 2002, 13(6): 711-717.

Cheng Yanjie, Bian Lingen, Lu Longhua. Antarctic sea-ice oscillation and itsrelationship with ENSO. J Appl Meteor Sci, 2002, 13(6): 711-717.

Citation:

Cheng Yanjie, Bian Lingen, Lu Longhua. Antarctic sea-ice oscillation and itsrelationship with ENSO. J Appl Meteor Sci, 2002, 13(6): 711-717.

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ANTARCTIC SEA-ICE OSCILLATION AND ITS RELATIONSHIP WITH ENSO

Chinese Academic of Meteorological Sciences, Beijing 100081

Received Date: 2001-06-23
Rev Recd Date: 2001-11-16
Publish Date: 2002-12-31

Abstract

Abstract

Antarctic Sea-ice oscillation and its relationship with indices of the atmospheric circulation of the Southern Hemisphere are examined by using 30 year Antarctic sea-ice concentration and NCEP data from January 1968 to December 1997 based on the EOF and SVD methods. A out-phase relationship is found between Ross Sea and Bellingshausen Sea, whose characteristics of the variation is defined as Antarctic Sea-ice Oscillation. Its index (ASOI) has a high correlation with SOI and Nino 3 Index when it is two months ahead of them. The high index and low index composite figures reveal the completely reverse patterns of SAT, SLP, and wind circulation in the Southern Ocean for the two extreme states. The sea-ice anomalies of the two key regions accompany with the opposite wind circulation which may influence the currents of the Southern Pacific ocean and the development of E1 Nino/La Nina events. This evidence indicates a possible ENSO signal between Ross sea and Bellingshausen sea.
- Antarctic;
- Sea-ice;
- Oscillation;
- ENSO

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References(11)

Figures and Tables

图 1 南极海冰EOF分析的首要状态

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图 2 温度场（a）,气压场（b）的SVD分析第1模态

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图 3 海冰涛动指数(ASOI)和SOI、Nino 3 指数的时间序列

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图 4 南极海冰涛动指数ASOI 与南方涛动指数

SOI(实线)、Nino 3 指数(虚线)超前和滞后的相关系数(海冰超前为(-),滞后为(+))

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图 5 ASOI高指数阶段的海平面温度（a）、气压（b）、风场（c）合成图ASOI低指数阶段的海平面温度（d）、气压（e）、风场（f）合成图

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References

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