| 贵州近44a降雪天气形势及物理量诊断分析 |
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| 引用本文： | 宋丹,胡跃文,刘丽萍.贵州近44a降雪天气形势及物理量诊断分析[J].气象科学,2008,28(Z1). |
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| 作者姓名： | 宋丹 胡跃文 刘丽萍 |
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| 作者单位： | 1. 贵州省气象科技服务中心,贵阳,550002
2. 贵州省毕节地区气象局,贵州毕节,551700 |
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| 基金项目： | 贵州省科学技术基金
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| 摘 要： | 利用NCEP/NCAR再分析资料和观测资料,对1962-2005年贵州出现的九次大范围持续时间较长的降雪天气过程的大气环流场、水汽和动力诊断进行分析,并与2008年1月28日降雪天气特征进行匹配验证.结果表明:北脊南槽型、横槽南支型、平直多波动型和高空急流型是造成贵州降雪的主要环流特征;冷空气南下及蒙新高地冷高压和滇黔准静止锋的维持是降雪天气发生的地面重要因素;南支波动是造成强降雪的基础条件;700 hPa西南暖湿气流引导孟加拉湾水汽向西南地区输送,为贵州降雪提供了必要条件;强烈的上升运动为降雪提供足够的动力条件;28日降雪天气特征与历史降雪特征高精确的匹配一致.
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| 关 键 词： | 降雪 大气环流 物理量 |
Diagnostic analysis of snowfall situation and physical quantity in winter of Guizhou Province |
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| Song Dan,Hu Yuewen,Liu Liping.Diagnostic analysis of snowfall situation and physical quantity in winter of Guizhou Province[J].Scientia Meteorologica Sinica,2008,28(Z1). |
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| Authors: | Song Dan Hu Yuewen Liu Liping |
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| Institution: | Song Dan1 Hu Yuewen1 Liu Liping2(1 Guizhou Meteorological Science & Technology Service Center,Guiyang 550002)(2 Bijie Meteorological Service,Guizhou Bijie 551700) |
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| Abstract: | Using NCEP/NCAR reanalysis and observation data,the large-scale and longer snowfall weather process of Guizhou from 1962 to 2005 has been analyzed in aspects of atmospheric circulation,water vapor and dynamic diagnosis,and used to verify the characteristics of snowfall which happened on 28 January 2008.The results are as follows:(1) there are four main circulation patterns causing snowfall weather at 500 hPa over the area in winter.They are the patterns with the ridge to the north and the trough to the sout... |
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| Keywords: | Snowfall Circulation Physical quantity |
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