Record-breaking 2023 marine heatwaves
ID：190
Poster Presentation
2027-01-15 17:30 （China Standard Time）
Session：Session 34 - Marine Heatwaves: Drivers, Predictability, Compound Extremes, and Impacts
Abstract
The year 2023 witnessed an extraordinary surge in marine
heatwaves (MHWs) across Earth’s oceans, setting new records
in duration, extent, and intensity, with MHW activity totaling
53.6 billion °C days square kilometer—more than three
standard deviations above the historical norm since 1982.
Notable events include the North Atlantic MHW (276-year
return period) and the Southwest Pacific (141 years). Using
ECCO2 (Estimating the Circulation and Climate of the Ocean
Phase II) high-resolution daily data, we conducted a mixed-layer
heat budget analysis and identified region-specific drivers:
enhanced shortwave flux and a shallower mixed layer in the
North Atlantic and North Pacific, reduced cloud cover and
increased advection in the Southwest Pacific, and oceanic
advections in the Tropical Eastern Pacific. The 2023 MHWs
highlight the intensifying impacts of a warm climate and the
challenges in understanding extreme events.
Speaker
Author
Important Dates
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Jan 30
2026
Session / Event proposals open
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Mar 31
2026
Session / Event proposals close
（Extended to April 7） -
Apr 30
2026
Session acceptance notifications
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Apr 30
2026
Abstract submissions & registration open
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Jun 30
2026
Abstract submissions close
（Extended to July 21） -
Aug 31
2026
Abstract acceptance notifications
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Sep 15
2026
Scientific program released
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Oct 15
2026
Early bird registration closes
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Jan 12–15
2027
XMAS 2027