消除模式“负水汽”算法的研究与试验  

THE EXPERIMENT AND STUDY FOR THE ELIMINATE “NEGATIVE MOISTURE”

作　　者：葛孝贞[1] 李峰[1] 

机构地区：[1]南京大学大气科学系

出　　处：《计算物理》1997年第4期657-659,共3页Chinese Journal of Computational Physics

基　　金：国家自然科学基金

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。The second order moment conservation and Bott advection 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.

关 键 词：输送格式 负水汽 数值模拟 水汽输运 

分 类 号：P426[天文地球—大气科学及气象学]