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Tropical climate variability: interactions across the Pacific, Indian, and Atlantic Oceans


Kajtar, JB and Santoso, A and England, MH and Cai, W, Tropical climate variability: interactions across the Pacific, Indian, and Atlantic Oceans, Climate Dynamics, 48, (7-8) pp. 2173-2190. ISSN 0930-7575 (2017) [Refereed Article]

Copyright Statement

Copyright 2016 Springer-Verlag Berlin Heidelberg

DOI: doi:10.1007/s00382-016-3199-z


Complex interactions manifest between modes of tropical climate variability across the Pacific, Indian, and Atlantic Oceans. For example, the El Niño–Southern Oscillation (ENSO) extends its influence on modes of variability in the tropical Indian and Atlantic Oceans, which in turn feed back onto ENSO. Interactions between pairs of modes can alter their strength, periodicity, seasonality, and ultimately their predictability, yet little is known about the role that a third mode plays. Here we examine the interactions and relative influences between pairs of climate modes using ensembles of 100-year partially coupled experiments in an otherwise fully coupled general circulation model. In these experiments, the air–sea interaction over each tropical ocean basin, as well as pairs of ocean basins, is suppressed in turn. We find that Indian Ocean variability has a net damping effect on ENSO and Atlantic Ocean variability, and conversely they each promote Indian Ocean variability. The connection between the Pacific and the Atlantic is most clearly revealed in the absence of Indian Ocean variability. Our model runs suggest a weak damping influence by Atlantic variability on ENSO, and an enhancing influence by ENSO on Atlantic variability.

Item Details

Item Type:Refereed Article
Keywords:climate variability, ENSO, Atlantic Ocean, Indian Ocean, Basinwide Mode, Atlantic Niño, tropical variability, climate modes
Research Division:Earth Sciences
Research Group:Atmospheric sciences
Research Field:Atmospheric dynamics
Objective Division:Environmental Management
Objective Group:Air quality, atmosphere and weather
Objective Field:Atmospheric processes and dynamics
UTAS Author:Kajtar, JB (Dr Jules Kajtar)
ID Code:133142
Year Published:2017
Web of Science® Times Cited:40
Deposited By:Oceans and Cryosphere
Deposited On:2019-06-13
Last Modified:2019-07-10

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