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大气科学  2000 

半拉格朗日、半隐式欧拉方程组大气数值模式研究

DOI: 10.3878/j.issn.1006-9895.2000.06.08

Keywords: 半拉格朗日、半隐式,欧拉方程组,三维模式,时间积分,数值试验

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Abstract:

介绍了一个具有较高时间积分效率的三维弹性大气数值模式。其中,控制方程为能够描述大气非静力及可压缩性的欧拉方程组,时间积分采用了高效率的“半拉格朗日、半隐式”方案。通过引用一个简化的“云物理过程”参数化方案,针对大气中深厚湿对流过程的若干问题进行了数值试验,结果表明,模式能够对该过程中的一些基本和复杂现象进行有效地模拟。试验结果还表明,动力学框架具有很好的稳定性,能够实现高效率的时间积分,它还具有较好的频散特性,保证了空间计算的精度,从而完好地描述了风暴的形态。

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