| 内蒙古高温天气成因分析 |
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| 引用本文： | 孙永刚,孟雪峰,云静波,王志春.内蒙古高温天气成因分析[J].内蒙古气象,2010(5):3-7. |
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| 作者姓名： | 孙永刚 孟雪峰 云静波 王志春 |
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| 作者单位： | 内蒙古气象台;赤峰市气象局; |
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| 摘 要： | 选取1971—2008年64次较强内蒙古高温酷暑天气过程,对其物理量分布特征和成因进行了分析,结果表明：300hPa高空锋区的北退或断裂与大陆暖高压系统的形成和发展有很好的相关性;对流层中层的暖平流对大陆暖高压系统的发展强盛起到关键作用,通常在暖高压系统的上游（西部、北部）维持暖平流时,暖高压系统将发展并维持强盛状态,当暖高压系统北部出现较强的冷平流时,暖高压系统将很快崩溃;500～850hPa厚度场可以更好的反映出整层气柱冷暖性质,其分布特征直接影响到内蒙古高温酷暑天气发生的部位和区域;蒙古暖高压控制区中盛行下沉气流,使得大气下沉增温,对流层中低层维持暖心结构,由于整层气柱很暖,低层减压形成了近地层的热低压,具有干热的特征。最后总结了内蒙古高温酷暑的定量预报指标。
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| 关 键 词： | 高温天气 暖高压 预报指标 |
Analysis on the Cause of Megathermal Weather in Inner Mongolia |
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| Authors: | Sun Yonggang Meng Xuefeng Yun Jingbo Wang Zhichun |
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| Institution: | Sun Yonggang1,Meng Xuefeng1,Yun Jingbo1,Wang Zhichun2(1.Inner Mongolia Meteorological Observatory,Inner Mongolia Hohhot 010051,2.Chifeng Meteorological Observatory,Inner Mongolia Chifeng 024000) |
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| Abstract: | By using observation data of 64 megathermal weather processes which started from 1971 to 2008,the distribution characteristic of physical quantity and cause of the megathermal weather were analyzed.The results showed that: The recession northward or breakdown of upper front at 300hPa had correlation with the formation and development of the continental warm high system,and at the middle of troposphere,warm advection played a key role in the development of the continental warm high system.Generally,if the wa... |
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| Keywords: | megathermal weather warm high forecasting index |
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