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《气象学报(英文版)》 2002-01
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LIU Yiming DING Yihui National Climate Center,Beijing 100081  
Based on the existing cumulus convective parameterization schemes,a mass flux scheme (MFS)for cumulus convective parameterization has been successfully developed by reference to the work of Chen et al.(1996).The MFS is a comprehensive scheme.In MFS,not only the importance of the large-scale moisture convergence is taken into account,but also it includes the cumulus updrafts and downdrafts,cumulus-induced subsidence in the environmental air. entrainment,detrainment and evaporation.The interaction between the cumulus and the environment is described by using a one-dimensional bulk model.At the same time the scheme includes the penetrative and shallow convections. The MFS has been successfully incorporated into the regional climate model RegCM2 developed by NCAR.The new model has been applied to simulate summer monsoon characteristics and their variations of heavy rainfall process in the Changjiang-Huaihe River Basins for three months from May to July 1991.The results show that the new model can successfully simulate this rainfall prolonged process.By comparising the model outputs of RegCM2.using the Kuo scheme and the MFS.it is found that the MFS is better in simulating the surface temperature,rainfall position and amount,and rainfall duration.
【Fund】: Supported by“National Key Program for Developing Basic Sciences”G1998040900;; the National Natural Science Foundation of China(No.49794030).
【CateGory Index】: P433
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