The Global Air-Sea Coupled Model was improved by DDC/NCC in 2003 as follows: 1) The initial field of ocean was substituted by real time ocean assimilation data provided by the ocean assimilation system of NCC; 2) In modeling forecast, single swatch forecast was substituted by EPS; 3) Regressive calculation of seasonal, annual and flood-season forecast during 1983-2002 was completed; 4) The coupling plan for modeling system was improved and the operational stability of the model was enhanced; 5) The system of air-sea coupled model was put into operation, the new radiation scenario namely Mocrette was added into the model, which made some improvement in model simulation and forecast effect; 6) The new land surface process model was checked in the modeling system.
The Global Air-Sea Coupled Model experienced the 2003 annual consultation meeting on flood-season forecast, the complementary consultation meeting and the operational experiment of annual consultation meeting. It had issued 6 forecasts, including 4 seasonal forecasts, 1 flood-season forecast and 1 annual forecast. The model had also been introduced in the 2003/2004 East Asian winter monsoon consultation meeting held by JMA. At present, further adjustment was undertaken for the model.
Much progress had been made in regional climate model improvement and operational work. The regional climate model had also took part in the abovementioned meetings and successfully forecasted the abnormity of raininess over the region between Yellow and Huaihe River in the summer of 2003.
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