计算物理 ›› 1997, Vol. 14 ›› Issue (S1): 657-659.

• 论文 • 上一篇    下一篇

消除模式“负水汽”算法的研究与试验

葛孝贞, 李峰   

  1. 南京大学大气科学系, 210093
  • 收稿日期:1997-02-17 修回日期:1997-05-07 出版日期:1997-12-25 发布日期:1997-12-25
  • 基金资助:
    本研究得到国家自然科学基金资助(批准号49675266)

THE EXPERIMENT AND STUDY FOR THE ELIMINATE “NEGATIVE MOISTURE”

Ge Xiaozhen, Li Feng   

  1. Department of Atmospheric Sciences, Nanjing University, 210093
  • Received:1997-02-17 Revised:1997-05-07 Online:1997-12-25 Published:1997-12-25

摘要: 以中尺度模式MM4为基础,将二种保证正定并具高精度的平流格式引入该模式计算水汽平流,模式在分别采用不同水汽平流格式下(其它模式条件完全相同),通过实例风场下对不同格式进行了理论测试和多个暴雨过程的实例模拟。

关键词: 输送格式, 负水汽, 数值模拟

Abstract: The second order moment conservation and Bottadvection schemes that are responsible for being positive definite and high accurate are introduced into the MM4(meso scale model) for moisture advection.When separately used with the MM4 with observed windfields available a range of scenarios have been subjected to theoretical test and numerical experiments done with more than one rainstorm event.Nurnerical results show that the improvement of calculation accuracy of model moisture advection is the key link of raising the prediction of weather calamities like heavy rain.

Key words: transfer scheme, negative moisture, numerical simulation

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