| 2009年南京冬季一次平流雾成因分析 |
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| 引用本文： | 严文莲,濮梅娟,刘安宁,孙燕,叶芳.2009年南京冬季一次平流雾成因分析[J].气象科学,2012,32(1):94-100. |
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| 作者姓名： | 严文莲 濮梅娟 刘安宁 孙燕 叶芳 |
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| 作者单位： | 1. 江苏省气象台,南京,210008
2. 解放军理工大学气象学院,南京,211101 |
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| 基金项目： | 国家自然科学基金资助项目（40975085），江苏省重大科技支撑与自主创新示范工程项目（BE2008618）；中国气象局气象关键技术集成与应用面上项目（CAMGJ2012M20） |
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| 摘 要： | 利用常规气象观测资料和NCEP 1°×1°的再分析资料,对2009年12月1—2日南京地区一次浓雾天气过程产生的大尺度天气背景、气象要素及各种物理量进行分析,结果表明:高空弱脊和地面弱高压的控制有效抑制对流的发展,为这次浓雾的形成提供有利的环流形势;地面弱冷空气的影响,低层弱的辐合上升及中高层下沉增温作用,促使多层逆温存在,为雾的形成提供有利的层结条件;前期降水条件、近地层偏东风场及暖干盖作用为雾的形成提供了丰富的水汽条件;另外污染物集聚,也为雾的形成提供了丰富的凝结核。
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| 关 键 词： | 平流雾 环流背景 物理量 |
| 收稿时间： | 2010/6/12 0:00:00 |
| 修稿时间： | 2010/8/19 0:00:00 |
Analysis of the formation cause about an advection fog event over Nanjing in winter of 2009 |
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| YAN Wenlian
,
PU Meijuan
,
LIU Anning
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SUN Yan
,
YE Fang.Analysis of the formation cause about an advection fog event over Nanjing in winter of 2009[J].Scientia Meteorologica Sinica,2012,32(1):94-100. |
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| Authors: | YAN Wenlian PU Meijuan LIU Anning SUN Yan YE Fang |
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| Institution: | 1 Jiangsu Meteorological Observatory,Nanjing 210008,China 2 Institute of Meteorology,PLA Universitical of Sciences and Technology,Nanjing 211101,China) |
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| Abstract: | Large-scale weather background,meteorological factors and various physical quantity of a dense fog event occurred in Nanjing on 1-2 Dec 2009 were analyzed by using routine observation and NCEP 1°×1° re-analysis data.The results showed that a weak high ridge at the high level and surface weak high pressure inhibited the development of convection and provided a good condition for the formation of fog.The impact of weak surface cold air,weak convergence at lower level and subsidence flow at the middle and high levels led to multi-layer inversion,and provided favorable stratification for the formation of fog.The presence of pre-precipitation,easterly winds near ground field as well as the role of warm-dry cover provided the water vapor for the fog event.In addition,the concentration of pollutants also provided plenty of nuclei for the formation of fog. |
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| Keywords: | Advection fog Circulation background Physical quantity Nanjing |
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