| 江苏连续三次区域性浓雾形成过程的机理分析 |
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| 引用本文： | 濮梅娟,马明明,张雪蓉,王博妮,邵禹晨.江苏连续三次区域性浓雾形成过程的机理分析[J].气象科学,2018,38(2):139-148. |
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| 作者姓名： | 濮梅娟 马明明 张雪蓉 王博妮 邵禹晨 |
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| 作者单位： | 江苏省气象台;海南省气象台;江苏省气象科学研究所;江苏省气象服务中心;南京信息工程大学 |
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| 基金项目： | 国家自然科学基金资助项目（41575135；40975085；41340042）；江苏省重大科技支撑与自主创新示范工程项目（BE2008618） |
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| 摘 要： | 本文利用常规观气象测资料、NCEP/NCAR再分析资料及风廓线雷达资料和能见度自动观测资料等对2013年12月上旬江苏省连续三次区域性浓雾的特征和发生发展机理进行了详细分析,重点对锋面冷却雾的形成过程进行了研究。结果表明:三次浓雾过程都发生在有利的环流形势下,但成因却显著不同。辐射雾主要由夜间地面辐射冷却配合高湿静风形成,边界层低空急流有利于逆温的形成,为浓雾发展、维持提供条件;平流雾是由海上暖湿平流流经江苏冷的下垫面而形成,东南气流输送充足的水汽、加上稳定的逆温层是平流雾形成的必要条件;锋面雾由冷锋前部的冷平流冷却效应而形成,浓雾主要发生在锋前,但冷锋入侵后,前期充分的水汽积累和动力辐合使锋后能见度依然较低,浓雾继续存在。
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| 关 键 词： | 区域性浓雾 诊断分析 物理特征 锋面冷却雾 |
| 收稿时间： | 2017/2/3 0:00:00 |
| 修稿时间： | 2017/9/26 0:00:00 |
An analysis for three successive fogs formation mechanisms in Jiangsu |
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| PU Meijuan,MA Mingming,ZHANG Xuerong,WANG Boni and SHAO Yuchen.An analysis for three successive fogs formation mechanisms in Jiangsu[J].Scientia Meteorologica Sinica,2018,38(2):139-148. |
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| Authors: | PU Meijuan MA Mingming ZHANG Xuerong WANG Boni and SHAO Yuchen |
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| Institution: | Jiangsu Meteorological Observatory, Nanjing 210008, China,Hainan Meteorological Observatory, Haikou 570203, China,Jiangsu Institute of Meteorological Sciences, Nanjing, 210009, China,Jiangsu Meteorological Information Service Center, Nanjing 210008, China and Nanjing University of Information Science & Technology, Nanjing 210044, China |
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| Abstract: | Based on normal observation data, NCEP/NCAR reanalysis data, wind profiler data and automatic visibility observation data, the characteristics and occurring and developing mechanisms of three fog weather processes in early December, 2013 in Jiangsu were analyzed with focus on formation of frontal fog. Results show that the three fogs was formed in favorable but different large-scale circulation. The radiation fog was formed by radiation cooling at surface and upper level humid wind, maintained by middle-level inversion and ground inversion with help of boundary low-level jet. The advection fog was formed by warm wet advection flowing into Jiangsu from sea and maintained by vapor from Southeast and stable inversion. The frontal fog generated in front of the frontal zone was formed by cool advection. The sufficient vapor accumulation and flux divergence make dense fog exist. |
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| Keywords: | Dense fog Diagnostic analysis Physical characteristics Frontal fog |
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