Oceanic forcing of the global warming slowdown in multi-model simulations
Journal article, Peer reviewed
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Date
2020Metadata
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- Geophysical Institute [1223]
- Registrations from Cristin [10237]
Original version
10.1002/joc.6548Abstract
Abstract
Concurrent with the slowdown of global warming during 2002–2013, the wintertime
land surface air temperatures over Eurasia, North America, Africa,
Australia, South America, and Greenland experienced notable cooling trends.
The oceanic effects on the continental cooling trends are here investigated
using two sets of uncoupled experiments with six different climate models.
Daily and annually varying sea ice is prescribed for both sets of experiments,
while daily and annually varying SST is used in the first set (EXP1) and daily
and annually repeating climatological mean SST in the second set (EXP2). All
six models capture the slowdown of global-mean land surface air temperature
during 2002–2013 winters in EXP1 only. The slowdown concurs with a negative
phase of the Pacific Decadal Oscillation (PDO), indicating that PDO plays
an important role in modulating the global warming signal. Not all ensemble
members capture the cooling trends over the continents, suggesting additional
contribution from internal atmospheric variability.
KEYWORDS
continental cooling, global warming, multi-model simulations, Pacific Decadal Oscillation