| “0801南方雪灾”与同期蒙古高压中期活动的关系 |
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| 引用本文： | 麻巨慧,王盘兴,李丽平,刘晴晴,姚锦烽.“0801南方雪灾”与同期蒙古高压中期活动的关系[J].南京气象学院学报,2009,32(5):652-660. |
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| 作者姓名： | 麻巨慧 王盘兴 李丽平 刘晴晴 姚锦烽 |
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| 作者单位： | 南京信息工程大学大气科学学院,江苏,南京,210044 |
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| 基金项目： | 国家科技支撑计划项目 |
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| 摘 要： | 用1951—2008年58 a 1月10日—2月2日1 000 hPa高度场逐日NCEP/NCAR再分析格点资料,求得逐日蒙古高压的强度P和中心位置λc、c指数,用其对＂0801南方雪灾＂期间蒙古高压的中期演变过程进行统计分析。结果表明,2008年1月10日—2月2日蒙古高压强度P和中心所在纬度φc出现了连续4次振荡,它们与我国南方降温、降水振荡过程准同步。由P、（λc,c）给出的综合动态图上蒙古高压4次活动过程也很明显地与降温、降水中期过程一一对应。分析表明2008年1月10日—2月2日蒙古高压的这一中期演变特征,是1951年以来仅有的一次。因此,可以认为,在充沛水汽供应条件下蒙古高压强而连续的爆发是导致＂0801南方雪灾＂产生的直接环流成因。
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| 关 键 词： | “0801南方雪灾” 蒙古高压 环流指数 中期过程异常 |
Contemporaneous Relationship between"0801 Snow Storm over Southern China"and Medium-term Activities of Mongolian High |
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| MA Ju-hui,WANG Pan-xing,LI Li-ping,LIU Qing-qing,YAO Jin-feng.Contemporaneous Relationship between"0801 Snow Storm over Southern China"and Medium-term Activities of Mongolian High[J].Journal of Nanjing Institute of Meteorology,2009,32(5):652-660. |
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| Authors: | MA Ju-hui WANG Pan-xing LI Li-ping LIU Qing-qing YAO Jin-feng |
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| Institution: | (School of Atmospheric Sciences,NUIST,Nanjing 210044,China) |
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| Abstract: | By using the 1000 hPa geopotential height grid data during the 10 January--2 February in 1951—2008(from the NCEP／NCAR daily reanalysis dataset)，a set of circulation indices are calculated to statistically analyze the medium—term processes of the Mongolian high during the“0801 snow storm over southern China”period，including indices of the intensity P and centre position(λ_c,φ_c)of the high．The results show that the P and φ_c of Mongolian high had four consecutive oscillations during
the period of 10 January-2 February 2008，which quasisynchronously related to the four medium—term
processes of temperature fall and precipitation over southern China．On the composite dynamic diagram of P and(λ_c,φ_c)，the four active processes of Mongolian high corresponded well with four mediumterm temperature fall and precipitation oscillations．This unique characteristic of the medium—term development of Mongolian high has been shown only once since 1951．Therefore，under the condition of abundant water vapor supply，it is the strong and continuous outbreaks of Mongolian high that directly
caused the“0801 snow storm over southera China”． |
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| Keywords: | 0801 snow storm southern China Mongolian high atmospheric circulation indices anomalous medium-term process |
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