Projections of faster onset and slower decay of El Niño in the 21st century

Hosmay Lopez (), Sang-Ki Lee, Dongmin Kim, Andrew T. Wittenberg and Sang-Wook Yeh
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Hosmay Lopez: Atlantic Oceanographic and Meteorological Laboratory, NOAA
Sang-Ki Lee: Atlantic Oceanographic and Meteorological Laboratory, NOAA
Dongmin Kim: Atlantic Oceanographic and Meteorological Laboratory, NOAA
Andrew T. Wittenberg: Geophysical Fluid Dynamics Laboratory, NOAA
Sang-Wook Yeh: Hanyang University

Nature Communications, 2022, vol. 13, issue 1, 1-13

Abstract: Abstract Future changes in the seasonal evolution of the El Niño—Southern Oscillation (ENSO) during its onset and decay phases have received little attention by the research community. This work investigates the projected changes in the spatio-temporal evolution of El Niño events in the 21st Century (21 C), using a multi-model ensemble of coupled general circulation models subjected to anthropogenic forcing. Here we show that El Niño is projected to (1) grow at a faster rate, (2) persist longer over the eastern and far eastern Pacific, and (3) have stronger and distinct remote impacts via teleconnections. These changes are attributable to significant changes in the tropical Pacific mean state, dominant ENSO feedback processes, and an increase in stochastic westerly wind burst forcing in the western equatorial Pacific, and may lead to more significant and persistent global impacts of El Niño in the future.

Date: 2022
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DOI: 10.1038/s41467-022-29519-7

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