Glacial South Atlantic surface temperatures interpolated with a semi-inverse ocean model

Grieger, B and Niebler, HS (2003) Glacial South Atlantic surface temperatures interpolated with a semi-inverse ocean model. Paleoceanography, 18(3). 1056. doi:10.1029/2002PA000773


To drive an atmospheric general circulation model, sea surface temperatures (SSTs) are needed as lower boundary condition. These are well known for the modern ocean, but for other time slices the database is very sparse, and often complete global SST fields are not available. To circumvent this problem, the SIMPLE ocean model has been developed, which estimates surface currents in a diagnostic manner from surface winds. Horizontal heat transports by advection and diffusion and surface heat fluxes are used to calculated SSTs. The unknown transports from the deep ocean are inversely estimated from sparse SST data. The model can be understood as a method to estimate a global SST field from a sparse data set, where it takes into account the wind driven surface circulation. The SIMPLE model is applied to a set of Last Glacial Maximum SSTs reconstructed from a new South Atlantic core data set. The resultant completed SST field exhibits more structure than the CLIMAP reconstruction with larger glacial cooling in the central equatorial Atlantic and off the shore of Angola/Namibia and less cooling in the central South Atlantic.

Item Type: Article
Additional Information: PANGAEA reference ID: 25623 Serial: RCOM0107
Subjects: MARUM
MARUM > MARUM OC - Ocean and Climate
peer reviewed publications
Divisions: MARUM
Depositing User: Eprints Administrator
Date Deposited: 25 Jul 2013 12:08
Last Modified: 25 Jul 2013 12:08

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