摘要
利用常规观测资料和NCEP资料以及WRFV2.0模式模拟的结果,对2009年3月21-23日黑龙江省中南部地区的大到暴雪过程进行了分析。结果表明：WRF模式对这次大到暴雪的区域进行了很好的模拟。进一步对模式输出的物理量进行了仔细的分析发现：中低层的西南气流为此次区域暴雪提供了充足的水汽;总螺旋度的变化对降雪的强度变化有一定的指示意义;在这次降雪过程中,MPV2的作用大于MPV1,说明条件性对称不稳定加强,有利于暴雪的形成。
Conventional observational data and the NCEP data and the simulation results of model-WRFV2.0 are used to simulate the process of an area snowstorm on March 21th to 23th in 2009 in the south-central region of Heilongjiang Province The results showed that： WRF model can make good simulation about the snowfall distribution. Further research on the physical output of the model found that： the southwest airflow in lower levels provides sufficient water vapor to this snowfall. Total helicity changes have the significant indication to changes of snow intensity. In this course of the snow, MPV2 is more important than MPVI., which show that the strengthen of conditional symmetric instability is conducive to the formation of snowstorm.
出处
《黑龙江气象》
2009年第3期5-8,共4页
Heilongjiang Meteorology
