Synergistic Effect of Warming in the Tropical Indian Ocean and North Tropical Atlantic on the Central-Pacific Type of La Nina Based on Observations and CMIP5

Previous studies have indicated that boreal winter-to-spring sea surface temperature anomalies (SSTA) over the tropical Atlantic or Indian Ocean can trigger the central-Pacific (CP) type of ENSO in the following winter due to winds over the western Pacific. Here, with the aid of observational data a...

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Bibliographic Details
Published in:Journal of Climate
Main Authors: Yang, Guang, Zhao, Xia, Yuan, Dongliang, Zhang, Yazhou, Liu, Lin, Peng, Shiqiu
Format: Report
Language:English
Published: AMER METEOROLOGICAL SOC 2023
Subjects:
Indian Ocean
North Atlantic Ocean
Atmosphere-ocean interaction
ENSO
Climate models
Interannual variability
Meteorology & Atmospheric Sciences
SEA-SURFACE TEMPERATURE
EL-NINO
EQUATORIAL ATLANTIC
CLIMATE VARIABILITY
SST ANOMALIES
IMPACTS
DIPOLE
STATE
MODE
Pacific
Indian
North Atlantic
Online Access:http://ir.qdio.ac.cn/handle/337002/184079
http://ir.qdio.ac.cn/handle/337002/184080
https://doi.org/10.1175/JCLI-D-22-0672.1
Description
Summary:Previous studies have indicated that boreal winter-to-spring sea surface temperature anomalies (SSTA) over the tropical Atlantic or Indian Ocean can trigger the central-Pacific (CP) type of ENSO in the following winter due to winds over the western Pacific. Here, with the aid of observational data and CMIP5 model simulations, we demonstrate that the ability of the winter-to-spring north tropical Atlantic (NTA) SSTA or Indian Ocean Basin (IOB) mode to initiate CP ENSO events in the following winter may strongly depend on each other. Most warming events of the IOB and NTA, which are followed by CP La Nifia events, are concomitant. The synergistic effect of the IOB and NTA SSTA may produce greater CP ENSO events in the subsequent winter via Walker circulation adjustments. The impacts between warming and cooling events of the IOB and NTA SSTA are asymmetric. IOB and NTA warmings appear to contribute to the subsequent CP La Nifia development, which is much greater than IOB and NTA cooling contributing to CP El Nifio. Overall, a combination of the IOB and NTA SSTA precursors may improve predictions of La Nifia events.

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