| 江苏地区雨雾天气特征及成因研究 |
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| 引用本文： | 王博妮,张雪蓉,孙明,田力,濮梅娟.江苏地区雨雾天气特征及成因研究[J].气象与环境学报,2020,36(1):58-66. |
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| 作者姓名： | 王博妮 张雪蓉 孙明 田力 濮梅娟 |
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| 作者单位： | 1. 中国气象局交通气象重点开放实验室, 江苏 南京 2100082. 江苏省气象服务中心, 江苏 南京 2100083. 江苏省气象科学研究所, 江苏 南京 2100084. 河南省气象台, 河南 郑州 4500035. 江苏省气象台, 江苏 南京 210008 |
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| 基金项目： | 国家自然科学基金项目(41575135、40975085、41340042);国家重点研发计划(2016YFC0201901);江苏省气象局科研项目(BK201807);江苏省气象局预报员专项(JSYBY201305)共同资助 |
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| 摘 要： | 利用2010—2016年江苏地区雨雾观测资料，对雨雾天气类型分型、气象要素变化以及成因机制等进行了分析。结果表明：江苏地区雨雾天气类型主要分为倒槽型、冷锋前部型、高压底部型，其中倒槽型发生频率最高；低气压、高湿度、低风速、风向由偏东风或东南风转为偏北风以及前期较高的气温等是雨雾形成的重要气象条件；雨雾形成时江苏地区925 hPa上正变温转为弱的负变温，说明弱冷空气促使了雨雾的发生；边界层低层的弱冷平流有利于水汽凝结和逆温形成，逆温最强时段对应能见度最低阶段；雨雾过程中边界层低层上升、下沉运动均可存在且垂直速度较小。
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| 关 键 词： | 雨雾 天气类型 成因机制 |
| 收稿时间： | 2018-04-11 |
Characteristics and formation mechanism of precipitation fog events in Jiangsu province |
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| WANG Bo-ni,ZHANG Xue-rong,SUN Ming,TIAN Li,PU Mei-juan.Characteristics and formation mechanism of precipitation fog events in Jiangsu province[J].Journal of Meteorology and Environment,2020,36(1):58-66. |
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| Authors: | WANG Bo-ni ZHANG Xue-rong SUN Ming TIAN Li PU Mei-juan |
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| Institution: | 1. Key Laboratory of Transportation Meteorology, China Meteorological Administration, Nanjing 210008, China2. Jiangsu Meteorological Service Center, Nanjing 210008, China3. Jiangsu Institute of Meteorological Sciences, Nanjing 210008, China4. He'nan Meteorological Observatory, Zhengzhou 450003, China5. Jiangsu Meteorological Observatory, Nanjing 210008, China |
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| Abstract: | Based on observational data of precipitation fog from 2011 to 2016 in Jiangsu province,we analyzed the synoptic types,the variation of meteorological parameters,and formation mechanisms of precipitation fog events.The results indicated that the main synoptic patterns for precipitation fog events in Jiangsu province include the inverted trough type,the ahead of cold front type,and the bottom of high-pressure type.The inverted trough type occurs most frequently and provides necessary meteorological conditions for the formation of precipitation fog,such as low air pressure,high humidity,low wind speed,ground wind direction shift from east/southeast to north,and high air temperature during the early period.During the formation period of precipitation fog events,positive temperature variability is converted to a weak negative value at 925 hPa over Jiangsu province,indicating that weak and cold air favors the occurrence of precipitation fog events.Weak and cold advection at the bottom of the boundary layer contributes to the condensation of water vapor and the formation of temperature inversion.The strongest temperature inversion corresponds to the lowest visibility.Both the updraft and downdraft with low vertical speeds are observed at the bottom of the boundary layer during precipitation fog events in Jiangsu province. |
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| Keywords: | Precipitation fog Synoptic type Formation mechanism |
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