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中文摘要: 对1998年4月18～19日发生在新疆、甘肃、宁夏、内蒙古等地的一次强沙尘暴天气过程从天气事实、天气学成因等方面进行了分析和诊断,然后利用非静力MM5模式对这次沙尘暴天气进行了数值模拟。结果表明,西西伯利亚强冷空气迅速东移,在新疆西部上空形成强锋区,对应的地面冷锋东移至前期增暖显著的新疆、内蒙古、甘肃、宁夏等地形成了本次大风、强沙尘暴天气。用非静力MM5模式较好地模拟出了此次强沙尘暴天气过程的地面强风系统、高空锋区的发生发展。
中文关键词: 沙尘暴，成因分析，数值模拟
Abstract:Based on weather facts and synoptic cause of formation, a strong dust devil weather case occurred on 18th to 19th April, 1998 is analyzed and diagnosed, and then numerical simulation with nonhydrostatic MM5 model for this case is made. The result shows that cold air from the western Siberian moves rapidly eastward and forms strong frontal zone over the western Xinjiang, which corresponding surface cold front moves to such special underlying surface as desert, gobi in Xinjiang, Inner Mongolia, Gansu and Ningxia provinces where were heated, and as a result, gale, strong dust devil weather would form. The MM5 model can successfully simulate the formation and development of this surface severe gale and upper air front zone.
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基金项目:科技部项目“西北干旱区沙尘暴预警服务系统研究”，甘肃省气象局98-01项目，中国气象局青年科技基金项目“西北地区灾害性天气机理研究及中尺度数值模拟”。
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引用文本：
许东蓓,康凤琴,郑新江,2002.1998年“4.18”强沙尘暴分析及数值模拟[J].气象,28(8):9-14.
,2002.Analysis and Numerical Simulation for a Strong Dust Devil Occurred on 18 April, 1998 in Northwest China[J].Meteor Mon,28(8):9-14.
许东蓓,康凤琴,郑新江,2002.1998年“4.18”强沙尘暴分析及数值模拟[J].气象,28(8):9-14.
,2002.Analysis and Numerical Simulation for a Strong Dust Devil Occurred on 18 April, 1998 in Northwest China[J].Meteor Mon,28(8):9-14.