The Impact of the Indian Ocean Basin Mode on Antarctic Sea Ice Concentration in Interannual Time Scales ...

The Antarctic sea ice variability has been linked to tropical sea surface temperature. However, little is known as to whether and how the Indian Ocean Basin Mode (IOBM) influences Antarctic sea ice changes. We revealed the existence of a teleconnection between the IOMB and Antarctic sea ice anomalie...

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Bibliographic Details
Main Authors: Yu, Lejiang, Zhong, Shiyuan, Vihma, Timo, Sui, Cuijuan, Sun, Bo
Format: Article in Journal/Newspaper
Language:English
Published: Zenodo 2022
Subjects:
Amundsen Sea
Antarctic
Austral
Dronning Maud Land
Indian
Pacific
The Antarctic
Weddell
Antarc*
Sea ice
Online Access:https://dx.doi.org/10.5281/zenodo.8060877
https://zenodo.org/record/8060877
Description
Summary:The Antarctic sea ice variability has been linked to tropical sea surface temperature. However, little is known as to whether and how the Indian Ocean Basin Mode (IOBM) influences Antarctic sea ice changes. We revealed the existence of a teleconnection between the IOMB and Antarctic sea ice anomalies, which is much stronger in austral spring and autumn than summer and winter. In particular, under the positive phase of the IOBM, significant positive sea ice anomalies occur in the Bellingshausen and northern Weddell Seas, in contrast to negative anomalies in the Amundsen Sea, the southern Atlantic Ocean, and the coastal seas off Dronning Maud Land. This teleconnection is established by planetary wavetrains excited over the tropical Indian Ocean and the tropical Pacific Ocean and is modulated by El Niño-Southern Oscillation. The IOBMrelated Antarctic sea ice anomalies are largely consistent with those of the anomalous surface air temperature and wind fields associated with the IOBM. ...

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