摘要
利用NCEP FNL全球分析资料、自动气象站资料,从动力条件、热力条件、水汽条件等方面对2013年6月30日-7月1日内蒙古阴山南部地区暴雨过程进行诊断分析,通过WRF3.3.1模式对本次暴雨天气过程的数值模拟试验,来探讨地形诱发的重力波拖曳(OGWD)效应对降雨的作用.试验结果表明:地形重力波拖曳效应使得地形降水没有随重力波的传播而向北发展,而是在阴山南部停滞,导致了此次阴山南部的强降水过程.引入OGWD参数化方案后,WRF3.3.1模式在降水落区、暴雨中心位置及强度方面的模拟能力都有了很大程度的改善,模拟结果与实况更为接近.
An rainstorm happened in south of Yinshan mountains lie in Inner Mongolia from June 30th to July lst,2013 is diagnostic analyzed using NCEP FNL global analysis data and auto- matic weather station data. Influences of orographic gravity wave drag （OGWD） on the precipitation are studied by the numerical simulation test using WRF3.3.1. The test results show that because of the effects of OGWD,the orographic precipitation didn＇t propagate northwards along the direction of gravitational field but stagnated and aggravated in the south of Yinshan mountains. This is the reasons for the strong precipitation process. After OGWD parameterization scheme was introduced into WRF3.3.1, the simulation ability of numerical modeling is greatly improved, the rainfall area, position and strength of the rainstorm center of the simulation results are closer to the observation.
出处
《内蒙古大学学报（自然科学版）》
CAS
北大核心
2016年第5期508-514,共7页
Journal of Inner Mongolia University：Natural Science Edition
基金
内蒙古自治区气象局科技创新项目"内蒙古中小流域山洪
地质灾害气象风险预警系统"(nmqxkjcx2013015)资助
