数值模拟青藏高原东北边缘冰雹云形成的中尺度环境——个例研究  

Numerical Simulation on a Strong Hailstorm Case over the Northeast Qinghai-Xizang Plateau

作　　者：周嵬[1] 张强[2] 康凤琴[2] 

机构地区：[1]中国气象科学研究院,北京100081 [2]中国气象局兰州干旱气象研究所甘肃省干旱气候变化与减灾重点实验室,甘肃兰州730020

出　　处：《干旱气象》2006年第3期5-13,共9页Journal of Arid Meteorology

基　　金：科技部社会公益性研究课题项目"西北地区防雹消雹技术"(2002DIB10046)资助

摘　　要：运用中尺度数值模式MM5，对2003年7月6～8日甘肃南部发生的一次典型区域性冰雹过程进行了数值模拟，并用模拟资料分析了大中尺度环流背景和局地对流单体群特征的演变。结果表明，模式MM5较好地模拟了这次冰雹天气过程和中尺度系统发生发展的特征；低层偏南暖湿气流和中高层西北气流为本次降雹过程提供了环流背景，地形等局地因素是本次冰雹天气发生的重要条件；对流单体主要在海拔较高的山脊处生成，并向低海拔地区移动传播，传播的速度和方向主要与地形和中高层风速风向有关。The hailstorm occurred on July 6 to 8, 2003 over the northeast of Qinghai - Xizang plateau was simulated by using MM5, and its meso - scale circulation background and local convective cells characteristics were analyzed based on simulated data. The results show that： （1） This hail fall process was simulated well by MM5; （2） Warm humid air from south at lower level and cold dry air from northwest at middle and upper level resulted in this weather process, and the factors such as local terrain, etc. were important to this event; （3） Convective cells formed at high altitude plots firstly and then spread to lower altitude area, and the speed and directions of cells＇ spread depend on terrain factors and upper level wind.

关 键 词：冰雹 青藏高原东北侧 数值模拟 中尺度 对流单体 

分 类 号：P456.7[天文地球—大气科学及气象学]