Sea surface height variability in ORCA025 forced with COREv2 and JRA-55-do.

Wagner, Patrick, Böning, Claus W. and Scheinert, Markus (2018) Sea surface height variability in ORCA025 forced with COREv2 and JRA-55-do. [Talk] In: DRAKKAR 2018 Annual Workshop. , 22.-24.01.2018, Grenoble, France .

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Abstract

Sea surface height (SSH) variability in the tropical Pacific is determined by surface fluxes of which momentum flux is the most important one. The new atmospheric forcing data set JRA-55-do (Tsujino, H. et al. (submitted)) offers the chance of an improved representation of tropical SSH variability. We present a comparison of SSH variability of the tropical Pacific in two global ORCA025 (Nemo3.6) configurations, forced with COREv2 and JRA-55-do atmospheric datasets. While the amplitude of SSH variability in COREv2-runs is in close agreement with altimeter observations, a reduced interannual variability of wind stress in JRA-55-do leads to weaker SSH-variability in the tropical Pacific.
A lagged correlation analyses of SSH with climate indices such as ENSO or Southern Oscillation shows a higher agreement between JRA-55-do and altimeter observations than between COREv2 and observations, suggesting an improved representation of the processes that determine SSH variability

Document Type: Conference or Workshop Item (Talk)
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-TM Theory and Modeling
Date Deposited: 22 Nov 2018 11:54
Last Modified: 22 Nov 2018 11:54
URI: http://oceanrep.geomar.de/id/eprint/44724

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