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一次副高控制下暴雨过程的数值模拟和诊断分析

Jin-lan WANG,Shao-wen SHOU,Guang-zhou ZHANG,Xiao-fang WANG,Feng-zhou ZHANG

Journal of Henan Normal University(Natural Science)（2009）

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Abstract
利用NCEP再分析资料和实时观测资料,用中尺度数值模式MM5对2007-08-25豫北暴雨过程进行了数值模拟.结果表明:这次暴雨过程水汽主要辐合在700 hPa以下;低层强辐合区配合高层强辐散区才能触发暴雨天气的爆发,250 hPa附近的辐散区对暴雨的贡献更大;干层携带高层冷空气的下沉逼迫作用,促进了对流层在垂直方向的深厚发展;在低空新生成的热力正环流的生消对暴雨的加强和维持起着重要作用.
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Key words
subtropical high,diagnosis analysis,heavy rainfall,numerical simulation
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