Coastal polynyas in the southwestern Weddell Sea: Surface fluxes, sea ice production and water mass modification

Coastal polynyas in the southwestern Weddell Sea were simulated using the Finite Element Sea Ice-Ocean Model forced with NCEP/NCAR Reanalysis data. The period 1990-2009 was used in analysis. Also, shorter model runs forced with GME and COSMO model data were branched off and compared. Depending on th...

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Bibliographic Details
Main Author: Haid, Verena
Other Authors: Lemke, Peter, Heinemann, Günther
Format: Doctoral or Postdoctoral Thesis
Language:English
Published: Universität Bremen 2013
Subjects:
coastal polynyas
Weddell Sea
heat flux
sea ice
salinity
HSSW
550
550 Earth sciences and geology
ddc:550
Weddell
Sea ice
Online Access:https://media.suub.uni-bremen.de/handle/elib/551
https://nbn-resolving.org/urn:nbn:de:gbv:46-00103445-15
Description
Summary:Coastal polynyas in the southwestern Weddell Sea were simulated using the Finite Element Sea Ice-Ocean Model forced with NCEP/NCAR Reanalysis data. The period 1990-2009 was used in analysis. Also, shorter model runs forced with GME and COSMO model data were branched off and compared. Depending on the region, the 20-year mean winter heat flux to the atmosphere is 310-510 W/m^2, whereof 50-60 W/m^2 are supplied by cooling the ocean and the remainder induces a sea ice production of 7-13 cm/(d m^2). The coastal polynyas (0.6% of the area) contribute 11% to the southwestern Weddell Sea sea ice production. In the mean 2 Sv High Salinity Shelf Water are exported from the continental shelves. Different forcing data sets can cause substantial disparities in the regional results.

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