Atlantic Multidecadal Variability in a model with an improved North Atlantic Current.

Drews, Annika and Greatbatch, Richard John (2016) Atlantic Multidecadal Variability in a model with an improved North Atlantic Current. Open Access Geophysical Research Letters, 43 (15). pp. 8199-8206. DOI 10.1002/2016GL069815.

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Abstract

We examine the simulated Atlantic Multidecadal Variability (AMV) in a model that includes a correction for a longstanding problem with climate models, namely the misplacement of the North Atlantic Current. The corrected model shows that in the warm AMV phase, heat is lost by the ocean in the northwestern part of the basin and gained by the ocean to the east, suggesting an advective transfer of heat by the mid-latitude westerlies. The basin wide response is consistent with a role for cloud feedback and is in broad agreement with estimates from observations, but is poorly represented in the uncorrected model. The corrected model is then used to show that the ocean/atmosphere heat transfer is influenced by low frequency variability in the overlying atmosphere. We also argue that changing ocean heat transport is an essential feature of our results.

Document Type: Article
Additional Information: Data shown in this paper are available by email from Annika Drews (adrews@geomar.de).
Keywords: Atlantic Multidecadal Variability; North Atlantic Current; Air-sea interaction
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
Open Access Journal?: No
DOI etc.: 10.1002/2016GL069815
ISSN: 0094-8276
Projects: HOSST, MiKlip, ATMOS-MODINI, KCM
Expeditions/Models/Experiments:
Date Deposited: 27 Jul 2016 06:28
Last Modified: 01 Feb 2019 15:03
URI: http://oceanrep.geomar.de/id/eprint/33470

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