| 2017年2月下旬浙江省一次冷锋引起的大风天气过程分析 |
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| 引用本文： | 毛程燕,龚理卿,孙杭媛,李浩文.2017年2月下旬浙江省一次冷锋引起的大风天气过程分析[J].气象与减灾研究,2018,41(2):105-111. |
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| 作者姓名： | 毛程燕 龚理卿 孙杭媛 李浩文 |
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| 作者单位： | 衢州市气象局,衢州市气象局,衢州市气象局,中山大学 大气科学学院，广州市气象台 |
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| 基金项目： | 浙江省气象局预报员专项(编号：2017YBY13) |
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| 摘 要： | 利用常规地面气象观测资料和NCEP再分析资料，对2017年2月20—21日浙江省中西部地区的一次冷空气大风天气过程进行分析。结果表明：西伯利亚冷高压与东亚大槽共同作用形成的强气压梯度是此次大风天气过程的重要成因；高空槽槽后动量下传是此次区域性大风超出一般冷锋大风强度的关键因素；200 hPa高空西风急流入流区的辐合下沉运动与冷锋前的上升运动叠加形成的次级环流是此次大风天气出现的增强条件。
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| 关 键 词： | 冷锋大风，气压梯度，动量下传，次级环流 |
| 收稿时间： | 2018/3/21 0:00:00 |
| 修稿时间： | 2018/6/29 0:00:00 |
Diagnostic analysis of windy weather caused by cold front in the West Central of Zhejiang province in late February 2017 |
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| Mao Chengyan,Gong Liqing,Sun Hangyuan and Li Haowen.Diagnostic analysis of windy weather caused by cold front in the West Central of Zhejiang province in late February 2017[J].Meteorology and Disaster Reduction Research,2018,41(2):105-111. |
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| Authors: | Mao Chengyan Gong Liqing Sun Hangyuan and Li Haowen |
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| Abstract: | An analysis of windy weather caused by passing cold front happened in the west Central of Zhejiang province from February 20 to 21, 2017 was performed using conventional observation surface data and NCEP reanalysis data of every 6 h. The results show that the strong barometric gradient induced by Siberian cold high with East Asia major trough is the main reason for this event; the downward momentum transportation from the upper trough is the key factor making wind during this period stronger than those in general cold front; secondary circulation caused by the union of descending motion in the inflow area of the upper westerly jet and ascending motion before the ground cold front is the enhanced condition. |
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| Keywords: | cold front gale barometric gradient downward momentum transmission secondary circulation |
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