Author(s): A. P. Makshtas; S. V. Shoutilin; V. F. Romanov
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Keywords: No Keywords
Abstract: A dynamic–thermodynamic sea ice model with 50-km spatial and 24-hour temporal resolution and zero-dimensional thermodynamic sea ice models are used to investigate the spatial and temporal variability of the sea ice cover and the surface energy exchange in the Arctic Basin. The models satisfactorily reproduce the averaged main characteristics of the sea ice and the sea ice extent in the Arctic Basin. At times the evaluation of atmospheric forcing data from NCEP, generally accepted for sea ice climate models, shows large disagreement with data from meteorological observations from drifting stations. The numerical experiments with zero-dimensional sea ice model reveal that negative feedback existing in nature and reproduced in the models artificially reduce the influence of inaccuracy of forcing parameters on the results of modeling sea ice thickness, but distort information about main surface heat fluxes. The possible approach to improve NCEP atmospheric surface data, based on the Rossby-number similarity theory and universal dimensionless functions is outlined.
Year: 2002