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http://hdl.handle.net/2122/5743
Authors: | Tedesco, L.* Vichi, M.* Haapala, J.* Stipa, T.* |
Title: | An enhanced sea-ice thermodynamic model applied to the Baltic sea | Journal: | Boreal Environment Research | Series/Report no.: | /14 (2009) | Publisher: | Boreal Environment Research Publishing Board | Issue Date: | 27-Feb-2009 | URL: | http://www.borenv.net/BER/pdfs/ber14/ber14-068.pdf | Keywords: | sea-ice biogeochemistry numerical model BFM |
Subject Classification: | 02. Cryosphere::02.04. Sea ice::02.04.99. General or miscellaneous 02. Cryosphere::02.04. Sea ice::02.04.01. Atmosphere/sea ice/ocean interaction 03. Hydrosphere::03.01. General::03.01.01. Analytical and numerical modeling 03. Hydrosphere::03.01. General::03.01.07. Physical and biogeochemical interactions |
Abstract: | A refined Semtner 0-layer sea-ice model (ESIM1) is presented and applied to the Baltic landfast sea-ice. The physical model is capable of simulating seasonal changes of snow and ice thickness. Particular attention is paid to reproducing the snow-ice and the super-imposed-ice formation which play important roles in the total mass balance of the Baltic sea-ice. The model prognostic variables include all kinds of ice and snow layers that may be present during a Baltic landfast ice season and, in general, in every coastal area of an ice-covered ocean. The assessment of the model capabilities was done for 1979–1993 for four different stations in the Baltic Sea. A sensitivity test stresses the relevant role of some of the physical parameters, such as the oceanic heat flux, while a scenario analysis highlights the robustness of the model to perturbed physical forcing. Our results show that one of the key variables in modelling sea-ice thermodynamics is the snow layer and its metamorphism, and including the meteoric ice dynamics into a sea ice model is relevant to properly simulate any ice season, also in view of climate change scenarios |
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