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Titel MOMBA 1.1 – a high-resolution Baltic Sea configuration of GFDL's Modular Ocean Model
VerfasserIn H. Dietze, U. Löptien, K. Getzlaff
Medientyp Artikel
Sprache Englisch
ISSN 1991-959X
Digitales Dokument URL
Erschienen In: Geoscientific Model Development ; 7, no. 4 ; Nr. 7, no. 4 (2014-08-18), S.1713-1731
Datensatznummer 250115680
Publikation (Nr.) Volltext-Dokument vorhandencopernicus.org/gmd-7-1713-2014.pdf
 
Zusammenfassung
We present a new coupled ocean-circulation–ice model configuration of the Baltic Sea. The model features, contrary to most existing configurations, a high horizontal resolution of ≈ 1 nautical mile (≈ 1.85 km), which is eddy-resolving over much of the domain. The vertical discretisation comprises a total of 47 vertical levels. Results from a 1987 to 1999 hindcast simulation show that the model's fidelity is competitive. As suggested by a comparison with sea surface temperatures observed from space, this applies especially to near-surface processes. Hence, the configuration is well suited to serve as a nucleus of a fully fledged coupled ocean-circulation–biogeochemical model (which is yet to be developed). A caveat is that the model fails to reproduce major inflow events. We trace this back to spurious vertical circulation patterns at the sills which may well be endemic to high-resolution models based on geopotential coordinates. Further, we present indications that – so far neglected – eddy/wind effects exert significant control on wind-induced up- and downwelling.
 
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