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Authors: Tedesco, Letizia* 
Vichi, M.* 
Title: BFM-SI: A new implementation of the biogeochemical flux model in sea ice
Issue Date: Mar-2010
Series/Report no.: RP
Keywords: sea-ice
biogeochemical model
Subject Classification02. Cryosphere::02.02. Glaciers::02.02.07. Ocean/ice interaction 
03. Hydrosphere::03.01. General::03.01.07. Physical and biogeochemical interactions 
03. Hydrosphere::03.04. Chemical and biological::03.04.01. Biogeochemical cycles 
03. Hydrosphere::03.04. Chemical and biological::03.04.04. Ecosystems 
Abstract: This work describes a novel implementation of the Biogeochemical Flux Model (BFM) in a sea ice system (BFMSI). The chosen representative groups of the sea ice food web rely on the same dynamics as the BFM. The main differences between BFM and BFMSI stand in the type and number of functional groups, in the parameters assigned to several physiological and ecological processes and in the dimensional size classes they represent. The differential equations of BFMSI are written here according to the nomenclature associated to the new sea ice state variables. At the boundaries, the sea ice system is also coupled to the atmosphere and to the ocean through the exchange of organic and inorganic matter. This is done by computing the entrapment of particulate and dissolved matter and gases when sea ice grows and release to the ocean when sea ice melts to ensure mass conservation. The implementation of the BFM in sea ice and the coupling structure in General Circulation Models will add a new component that may provide new adequate estimate of the role and importance of sea ice biogeochemistry in the global carbon cycle.
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