The impact of sea surface temperature bias on equatorial Atlantic interannual variability in partially coupled model experiments

Ding, Hui, Greatbatch, Richard John, Latif, Mojib and Park, Wonsun (2015) The impact of sea surface temperature bias on equatorial Atlantic interannual variability in partially coupled model experiments Geophysical Research Letters, 42 . pp. 5540-5546. DOI 10.1002/2015GL064799.

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Abstract

We examine the impact of sea surface temperature (SST) bias on inter-annual variability during boreal summer over the equatorial Atlantic using two suites of partially coupled model (PCM) experiments with and without surface heat flux correction. In the experiments, surface wind stress anomalies are specified from observations while the thermodynamic coupling between the atmospheric and oceanic components is still active as in the fully coupled model. The results show that the PCM can capture around 50% of the observed variability associated with the Atlantic Niño from 1958 to 2013, but only when the bias is substantially reduced using heat flux correction, with no skill otherwise. We further show that ocean dynamics explain a large part of the SST variability in the eastern equatorial Atlantic in both observations (50-60%) and the PCM experiments (50-70%) with heat flux correction, implying that the seasonal predictability potential may be higher than currently thought.

Document Type: Article
Additional Information: WOS:000358691300057
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-TM Theory and Modeling
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-ME Maritime Meteorology
Kiel University
Refereed: Yes
DOI etc.: 10.1002/2015GL064799
ISSN: 0094-8276
Related URLs:
Projects: SPACES, SACUS, PREFACE
Expeditions/Models:
Date Deposited: 13 Jul 2015 10:43
Last Modified: 10 Apr 2017 08:17
URI: http://eprints.uni-kiel.de/id/eprint/29225

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