| 一次特强霜冻天气过程诊断分析 |
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| 引用本文： | 高振荣,郭良才.一次特强霜冻天气过程诊断分析[J].安徽农业科学,2010,38(35):20205-20207. |
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| 作者姓名： | 高振荣 郭良才 |
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| 作者单位： | [1]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 [2]甘肃省酒泉市气象局,甘肃酒泉735000 |
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| 基金项目： | 由国家科技攻关计划重大项目,甘肃省气象局气象科研项目 |
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| 摘 要： | 以≤-2.0℃地面最低温度作为霜冻指标,利用河西走廊中西部10个气象观测站点的实时观测资料和相应的数值预报资料,采用现代天气诊断方法,对2004年5月3～4日特强霜冻天气过程进行了探讨分析。针对霜冻天气发生发展的特点,在剖析环流背景的基础上,重点分析了500 hPa的v风场及其廓线;总能量的平流变化等物理量。结果表明,北风带的东移南扩是造成此次大范围霜冻天气的关键因子,总能量的持续偏低使得强霜冻的持续时间延长。
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| 关 键 词： | 霜冻 风场 总能量 分析 |
Synoptic Diagnosis and Analysis of a Strong Frost Weather Process |
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| Institution: | GAO Zhen-rong et al(Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province,Institute of Arid Meteorology,CMA,Lanzhou,Gansu 730020) |
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| Abstract: | Taking ≤-2.0 ℃ lowest surface temperature as the index of frost,the causes of "2004.5.3-4"strong frost in west and middle of Hexi Corridor were discussed by using ten weather observational stations data in the areas and the numerical weather prediction data.Based on synoptic diagnose method,the background of atmospheric circulation during strong frost were analyzed.500 hPa field of v-wind and its profile characteristics and the total energy variation of horizontal advection were analyzed.The results showed that the strong north wind moved from northwest to southeast was the key factor,and that the total energy continuous low led to the strong frost extend for a long time. |
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| Keywords: | Frost Wind field Total energy Analysis |
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