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| Titel |
Effects of convection instability due to incompatibility between ocean dynamics and surface forcings |
| VerfasserIn |
W. Cai, P. C. Chu |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 15, no. 8 ; Nr. 15, no. 8, S.1067-1075 |
| Datensatznummer |
250012915
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| Publikation (Nr.) |
 copernicus.org/angeo-15-1067-1997.pdf |
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| Zusammenfassung |
| The study demonstrates that an
incompatibility between a surface temperature climatology and a given ocean
model, into which the climatology is assimilated via Haney restoration, can
cause model ocean climate drift and interdecadal oscillations when the ocean is
switched to a weaker restoration. This is made using an idealized Atlantic Ocean
model driven by thermal and wind forcing only. Initially, the temperature
climatology is forcefully assimilated into the model, and an implied heat flux
field is diagnosed. During this stage any incompatibility is suppressed. The
restoring boundary condition is then switched to a new forcing consisting of a
part of the diagnosed flux and a part of the restoring forcing in such a way
that at the moment of the switching the heat flux is identical to that prior to
the switching. Under this new forcing condition, the incompatibility becomes
manifest, causing changes in convection patterns, and producing drift and
interdecadal oscillations. The mechanisms are described. |
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