Местоположение издательства:Road Town, United Kingdom
Первая страница:537
Последняя страница:556
Аннотация:The ocean general circulation model developed at the Institute of Numerical Mathematics, Russian
Academy of Sciences, is briefly described. The model is based on a complete system of nonlinear (primitive) equations describing ocean hydro- and thermodynamics in the Boussinesq approximation and written in a spherical -coordinate system. The main feature of the model is that its numerical implementation makes use of splitting with respect to physical processes and spatial coordinates. This allows the use of efficient implicit algorithms. The annual mean regime produced in a 121-year model run with a realistic climatic annual cycle of atmospheric forcing specified from the NCEP reanalyses is analyzed and compared with observations. The simulated ocean circulation patterns and thermohaline fields are shown to accord, on the whole, with observations and to agree well with results of other models. The sensitivity of the global thermohaline circulation to variations in wind stress is examined. To this end, two experiments with different wind stresses specified from NCEP and ECMWF reanalyses are compared. The response of the thermohaline structure and ocean circulation to this wind variation is analyzed. In turn, this response leads to noticeable variations in meridional heat and freshwater transport, which is important in climate formation.