日本地球惑星科学連合2022年大会

講演情報

[E] ポスター発表

セッション記号 A (大気水圏科学) » A-OS 海洋科学・海洋環境

[A-OS14] Physical, biogeochemical, and ecological processes and variability in the Indian Ocean

2022年5月31日(火) 11:00 〜 13:00 オンラインポスターZoom会場 (8) (Ch.08)

コンビーナ:升本 順夫(東京大学大学院理学系研究科)、コンビーナ:齊藤 宏明(東京大学大気海洋研究所)、座長:升本 順夫(東京大学大学院理学系研究科)

11:00 〜 13:00

[AOS14-P05] Climate precursor for cholera outbreaks over Bengal Delta region

*尾形 友道1、Racault Marie-Fanny、野中 正見1Behera Swadhin1 (1.海洋研究開発機構 アプリケーションラボ)

In this study, we investigated climate precursor of the SWM over the northern Bay of Bengal (BoB) with a lagged correlation analysis among SST, rainfall anomalies over India, and SWM anomaly over BoB. The results suggest that the positive rainfall anomaly by monsoon-ENSO relationship (i.e. enhanced rainfall over India during La Nina) can increase the turbidity and turbid river discharge over the Bengal Delta. The La Nina signal can be traced back two seasons ahead of March-May season and hence could be a useful predictor. The multiple regression model explains the SWM variability better than single regression cases. However, it should be noted that the monsoon-ENSO relationship is not stable but interdecadal variable.