| 安徽淮河以南区域性暴雨大尺度环流背景分析 |
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| 引用本文： | 宋佑之,胡姗姗. 安徽淮河以南区域性暴雨大尺度环流背景分析[J]. 中国农学通报, 2015, 31(28): 229-236. DOI: 10.11924/j.issn.1000-6850.casb15050058 |
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| 作者姓名： | 宋佑之 胡姗姗 |
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| 作者单位： | (安徽省滁州市气象局,安徽滁州 239000） |
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| 基金项目： | 安徽省气象科技发展基金“滁州市短期温度降水多模式集成预报”(KM201404)。 |
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| 摘 要： | 为了从气候平均态的角度掌握安徽淮河以南汛期区域性暴雨的大气环流背景和物理量配置的特征，为区域性暴雨预报提供有利参考，本研究利用合成分析、EOF分解、显著性差异检验、相关分析等方法，对1960—2013年安徽淮河以南地区5—9月171次区域性暴雨个例进行分析，以研究其时空分布、大尺度环流分型及物理量场分布特征。研究表明：安徽淮河以南区域性暴雨大尺度环流特征主要表现为中高纬“2脊1槽”型。暴雨主要是边界层偏南风急流、低空西南急流和高空西风急流三者垂直方向上耦合的结果，暴雨区多位于南亚高压北侧，高空西风急流南侧，低空急流左前方和边界层急流中心的左侧及850 hPa暖切南侧，且垂直方向上呈现湿位涡正负区叠置的形势，为暴雨的产生提供不稳定层结条件。
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| 关 键 词： | 果树 果树 库源关系 末端产物积累 光合下调 碳氮比 |
| 收稿时间： | 2015-05-12 |
| 修稿时间： | 2015-07-09 |
Background Analysis of Large Scale Circulation of Regional Rainstorm in the South Area of Huaihe River, Anhui |
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| Song Youzhi and Hu Shanshan. Background Analysis of Large Scale Circulation of Regional Rainstorm in the South Area of Huaihe River, Anhui[J]. Chinese Agricultural Science Bulletin, 2015, 31(28): 229-236. DOI: 10.11924/j.issn.1000-6850.casb15050058 |
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| Authors: | Song Youzhi and Hu Shanshan |
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| Affiliation: | (Meteorological Bureau of Chuzhou City in Anhui Province, Chuzhou Anhui 239000) |
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| Abstract: | The paper aims to master the background of general atmospheric circulation and features of physical quantity allocation of regional rainstorm in flood season in the south areas of Huai River, Anhui Province, and provide favorable reference for regional rainstorm forecast. The author analyzed 171 typical cases of regional rainstorm from May to September in the south areas of Huai River, Anhui Province in 1960-2013 based on composite analysis, EOF decomposition, significant difference tests and correlation analysis, and mainly analyzed spatial and temporal distribution, large-scale circulation type and distribution characteristics of physical quantity field. The results showed that: large scale circulation features of regional rainstorm in the south areas of Huai River, Anhui Province marked by a two ridges-one trough in the high latitude to the south of the Huai River regional rainstorm large-scale circulation feature mainly for the black mountain near the highly significant positive abnormal strengthening, prompting the cold air from the north along the ridge of the northerly flow south, mid high latitude showed two ridge one trough. Heavy rain was caused by the convergence of three flows in the vertical direction: the southerly jet in the boundary layer, southwest jet in the low level and westerly jet. The rainstorm area was often located in north to the south Asian high, to south of upper westerly jet, and the left front of the low-level jet, the left side of the boundary layer jet, and south to the warm shear in the 850 hPa level, positive and negative moist potential vorticity were overlapped in the vertical direction. Unstable stratification condition was thus favorable for heavy precipitation. |
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| Keywords: | flood season rainstorm atmospheric circulation storm classification jet stream |
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