It is needed that the coupling between macro - scale hydrological model and climatic model for improving the parameterization of land - surface hydrological processes in gcm and the accuracy of gcm prediction 为了改善全球环流模型中对陆面水文过程的描述,提高气候模型的模拟预测精度,有必要实现大尺度水文模型与气候模型的联结耦合。