Inter-comparisons of thermodynamic sea-ice modeling results using various parameterizations of radiative flux

1 Introduction The solar and terrestrial radiations are the major energy sources and sinks for the earth climate system. Climatologically, in high latitudes and polar regions, the radiative fluxes are often an order of magnitude larger than the other surf…

Inter-comparisons of thermodynamic sea-ice modeling results using various parameterizations of radiative flux

Radiative fluxes are of primary importance in the energy and mass balance of the sea-ice cover. Various parameterizations of the radia- tive fluxes are studied in a thermodynamic sea-ice model. Model outputs of the surface radiative and heat fluxes and mass balance are compared with observations. The contribution of short-wave radiation is limited to a long part of winter. Therefore, simple schemes are often sufficient. Errors in estimations of the short-wave radiation are due mainly to cloud effects and occasionally to multi-reflection between surface and ice crystals in the air. The long-wave radiation plays an important role in the ice surface heat and mass balance during most part of a winter. The effect of clouds on the accuracy of the simple radiative schemes is critical, which needs further atten- tion. In general, the accuracy of an ice model depends on that of the radiative fluxes.