报告详情
Maintenance of multi-year La Niña by phytoplankton feedback in the tropical Pacific
编号：1201
访问权限：仅限参会人
更新：2024-10-14 11:02:50 浏览：188次
张贴报告
报告开始：2025年01月14日 21:05（Asia/Shanghai）
报告时间：15min
所在会场：[S65] Session 65-Oceanic-Atmospheric Processes Over the Indian and Western Pacific Oceans [S65-P] Oceanic-Atmospheric Processes over the Indian and Western Pacific Oceans
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摘要
The occurrence of multi-year La Niña (MLN) event shows an increasing trend over the historical period, causing adverse climate and ecological impacts. In the equatorial Pacific, the ocean ecosystem undergoes significant changes during MLN, particularly in surface chlorophyll, which serves as a proxy for primary production. Interestingly, the impacts of chlorophyll on the evolution and amplitude of MLN remain unknown. Here, using a hierarchy of ocean model experiments, we show that interannual variations in surface chlorophyll cause initial warming during the first year of MLN due to a chlorophyll-induced heating effect. Subsequently, this warming leads to enhanced meridional advection and vertical mixing, resulting in cooling anomalies in the western equatorial Pacific during the second year of MLN. This differential impact between the western basin and the eastern basin contributes to sustaining the cooling phase of MLN. Additionally, the effect of chlorophyll is further amplified by the presence of subsurface chlorophyll maximum during MLN. Given the potential phytoplankton feedback, chlorophyll may play a significant role in shaping the evolution of MLN, and its influence should be considered in future ENSO predictions.
关键词
ENSO,La Nina diversity,biological feedback
报告人
Feng Tian
Associate Researcher Institute of Oceanology； Chinese Academy Sciences稿件作者
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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
Department of Earth Sciences, National Natural Science Foundation of China
联系方式
- Kejing GU
- xm******@xmu.edu.cn
- +86*********
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