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Role of the Maritime Continent in the remote influence of Atlantic Niño on the Pacific

Earth Sciences

Role of the Maritime Continent in the remote influence of Atlantic Niño on the Pacific

S. Liu, P. Chang, et al.

Explore how the Atlantic Niño influences the Pacific and sparks a La Niña-like response by uncovering the role of atmospheric waves and the Maritime Continent's geography. This groundbreaking research by Siying Liu, Ping Chang, Xiuquan Wan, Stephen G. Yeager, and Ingo Richter reveals critical interactions vital for accurate climate simulations.

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Playback language: English
Abstract
Atlantic Niño, a significant climate mode in the equatorial Atlantic, exerts remote influence on the Pacific, inducing a La Niña-like response. This study uses observations and large-ensemble simulations to investigate the underlying mechanisms. An eastward-propagating atmospheric Kelvin wave, traveling from the Atlantic through the Indian Ocean to the Pacific, is identified as the primary pathway. The Maritime Continent's orography contributes to orographic moisture convergence, facilitating the formation of a local Walker Cell. Land friction over the Maritime Continent dissipates Kelvin wave energy, influencing the Bjerknes feedback and the La Niña-like response's strength. Improved representation of land-atmosphere-ocean interactions over the Maritime Continent is crucial for accurate simulation of Atlantic Niño's impact on El Niño-Southern Oscillation (ENSO).
Publisher
Nature Communications
Published On
Jun 07, 2023
Authors
Siying Liu, Ping Chang, Xiuquan Wan, Stephen G. Yeager, Ingo Richter
Tags
Atlantic Niño
La Niña
atmospheric Kelvin wave
Maritime Continent
Bjerknes feedback
land-atmosphere-ocean interactions
ENSO
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