Interdecadal modulation of Ningaloo Nino/Nina strength in the Southeast Indian Ocean by the Atlantic Multidecadal Oscillation.

ABSTRACT: The Southeast Indian Ocean is a global hotspot for marine heatwaves. In that region, marine heatwaves/cold-spells are known as Ningaloo Niño/Niña events, and have substantial impacts on regional climate anomalies and unique marine ecosystems. However, the strength of Ningaloo Niño/Niña events is nonstationary and varies considerably at multidecadal timescales. Here we find that the interdecadal fluctuations in Ningaloo Niño/Niña strength are modulated by the Atlantic Multidecadal Oscillation (AMO), with strengthened (weakened) Ningaloo Niño/Niña corresponding to a positive (negative) AMO phase. During the positive AMO phase, the Atlantic warm sea surface temperature (SST) anomalies drive a series of climate mean-state changes in the Indo-Pacific region through tropics-wide teleconnections,

SUBMITTER: Xue J 

PROVIDER: S-EPMC11862163 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature