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Strengthened Relationship Between Tropical Indian Ocean Dipole and Subtropical Indian Ocean Dipole After the Late 2000s
编号：314 访问权限：仅限参会人 更新：2024-10-11 17:43:13 浏览：206次 张贴报告

报告开始：2025年01月15日 18:35（Asia/Shanghai）

报告时间：15min

所在会场：[S60] Session 60-Indian Ocean Dynamics, Air-sea Interaction and Biogeochemical Cycles [S60-P] Indian Ocean Dynamics, Air-sea Interaction and Biogeochemical Cycles

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摘要
This study identifies a strengthened relationship between the subtropical Indian Ocean dipole (SIOD) during January–February–March (JFM) and the following autumn Indian Ocean dipole (IOD) after the late 2000s. Following the positive SIOD, the northwesterly wind anomalies help to maintain positive sea surface temperature (SST) anomalies in the southwestern tropical Indian Ocean by wind-evaporation-SST (WES) feedback during June–July–August (JJA). The anomalous northwesterly winds and the sustained positive SST anomalies promote the development of the zonal wavenumber-3 pattern (ZW3P) and induce low-level convergence in the mid-latitude central southern Indian Ocean, leading to the anticyclone circulation over the northern Indian Ocean by the local Hadley circulation during JJA. The accompanying central equatorial easterly wind anomalies appear in JJA, which is the key to trigger a positive IOD event through Bjerknes feedback. This mechanism for the enhanced SIOD-IOD relationship is independent from the El Niño-Southern Oscillation (ENSO).
关键词
tropical and subtropical interaction
报告人
Bicheng Huang
Other China；College of Physical Science and Technology； Yangzhou University； Yangzhou

稿件作者
Bicheng Huang China；College of Physical Science and Technology； Yangzhou University； Yangzhou
Guolin Feng College of Physical Science and Technology, Yangzhou University, Yangzhou, China
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重要日期

  • 会议日期

    01月13日

    2025

    至

    01月17日

    2025

  • 09月27日 2024

    初稿截稿日期

  • 01月17日 2025

    注册截止日期

主办单位
State Key Laboratory of Marine Environmental Science, Xiamen University
承办单位
State Key Laboratory of Marine Environmental Science, Xiamen University
Department of Earth Sciences, National Natural Science Foundation of China
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