| 南京冬季雾爆发性增强的物理特征研究 |
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| 引用本文： | 濮梅娟,严文莲,商兆堂,杨军,李子华.南京冬季雾爆发性增强的物理特征研究[J].高原气象,2008,27(5). |
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| 作者姓名： | 濮梅娟 严文莲 商兆堂 杨军 李子华 |
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| 作者单位： | 1. 江苏省气象台,江苏,南京210008
2. 南京信息工程大学,大气物理与大气环境实验室,江苏,南京210044 |
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| 基金项目： | 江苏省科技创新与成果转化(重大科技支撑与自主创新)专项，中国气象局研究型业务项目，江苏省自然科学基金重点项目 |
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| 摘 要： | 根据2006年12月在南京市郊观测的3次浓雾过程(12月12日、14日和24~27日)资料,分析了雾的发展过程及爆发性增强特征,探讨了雾体爆发性增强的原因。结果表明:南京冬季雾爆发性增强的物理特征是在很短时间内(30 min以内),能见度急剧下降,雾滴数密度和含水量明显增加、尺度明显增大、雾滴谱变宽。究其原因,发现夜晚长波辐射增强或近地层出现冷平流造成的气温急剧下降,日出后地表水分蒸发或西南湿平流增强造成的湿度明显增大以及湍流混合作用,都能导致雾体爆发性增强。
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| 关 键 词： | 南京 浓雾 平流-辐射雾 |
Study on the Physical Characteristics of Burst Reinforcement during the Winter Fog of Nanjing |
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| PU Mei-juan,YAN Wen-lian,SHANG Zhao-tang,YANG Jun,LI Zi-hua.Study on the Physical Characteristics of Burst Reinforcement during the Winter Fog of Nanjing[J].Plateau Meteorology,2008,27(5). |
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| Authors: | PU Mei-juan YAN Wen-lian SHANG Zhao-tang YANG Jun LI Zi-hua |
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| Institution: | PU Mei-juan1,YAN Wen-lian2,SHANG Zhao-tang1,YANG Jun2,LI Zi-hua2 |
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| Abstract: | Based on the data of three dense fog processes on 12,14 and 24~27 December,2006 occurred in the suburb of Nanjing,their development processes of fog and the characteristics of burst reinforcement are analyzed,and some reasons about burst reinforcement of fog are discussed.The result showed that the physical characteristics of burst reinforcement during the winter fog of Nanjing were as follows: Visibility fell sharply with short time(in 30 minutes),fog droplet number concentration,water content and droplet size increased markedly,and fog droplet spectrum became broader.Some causes were revealed that sharp drop of temperature because of radiant reinforcement of long wave or cold advection of nether layer,increase of humidity because of water vaporization of surface after sunrise or enhancement of southwest humid advection with turbulent mixing can make fog reinforce eruptively. |
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| Keywords: | Nanjing Dense fog Advection-radiation fog |
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