| 江苏一次冬季强浓雾天气持续和消散诊断分析 |
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| 引用本文： | 马明明,潘婧茹,张雪蓉,濮梅娟.江苏一次冬季强浓雾天气持续和消散诊断分析[J].气象科学,2016,36(3):396-402. |
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| 作者姓名： | 马明明 潘婧茹 张雪蓉 濮梅娟 |
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| 作者单位： | 南京信息工程大学, 南京 210044,南京信息工程大学, 南京 210044,南京信息工程大学, 南京 210044;中国气象科学研究院, 北京 100081,南京信息工程大学, 南京 210044;江苏省气象局, 南京 210008 |
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| 基金项目： | 国家自然科学基金资助项目（41575135，41340042，40975085），江苏省科技支撑计划社会发展重大项目（BE2012771），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： | 本文利用常规气象观测资料、NCEP再分析资料及加密自动气象站资料对2006年12月24—27日江苏省持续了4 d的大雾天气进行分析,重点对强浓雾天气的持续和消散特征进行了诊断研究。结果表明:此次雾在辐射降温条件下形成,在暖平流作用下辐射雾转为平流雾并且增强;暖湿平流为雾的发展提供了有利的水汽和热力条件;中高层辐合下沉增温和低层弱上升运动,使得逆温层稳定维持,是浓雾持续不消有利的动力条件;雾消散阶段,低层正涡度平流南下,使大气层结出现位势不稳定,伴随着冷空气入侵,辐散下沉,垂直运动相应增大,逆温层彻底被破坏,动力和热力条件相配合最终导致雾消散。
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| 关 键 词： | 强浓雾 诊断分析 物理特征 动力条件 热力条件 |
| 收稿时间： | 2014/10/20 0:00:00 |
| 修稿时间： | 2014/12/8 0:00:00 |
A diagnostic analysis on maintaining and dissipation of a winter dense fog in Jiangsu |
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| MA Mingming,PAN Jingru,ZHANG Xuerong and PU Meijuan.A diagnostic analysis on maintaining and dissipation of a winter dense fog in Jiangsu[J].Scientia Meteorologica Sinica,2016,36(3):396-402. |
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| Authors: | MA Mingming PAN Jingru ZHANG Xuerong and PU Meijuan |
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| Institution: | School of Atmospheric Sciences, Nanjing University of Information Science & Technology, Nanjing, 210044,School of Atmospheric Sciences, Nanjing University of Information Science & Technology, Nanjing, 210044,School of Atmospheric Sciences, Nanjing University of Information Science & Technology, Nanjing, 210044;Chinese Meteorological Science Academy, Beijing 100081, China and School of Atmospheric Sciences, Nanjing University of Information Science & Technology, Nanjing, 210044;Jiangsu Meteorological Bureau, Nanjing, 210008, China |
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| Abstract: | Based on the conventional observation data, NCEP reanalysis data, and the automatic weather station data, a dense fog weather lasting from 24 to 27 in December of 2006 in Jiangsu is analyzed and the features of the maintaining and dissipation of this dense fog is diagnostically emphasized to carry out diagnostical study. Results show that the fog formed under the condition of radiation cooling, which changed from the radiation fog to advection fog and enhanced by warm advection. The warm and wet advection provided favorable water vapor and thermal conditions for development of the fog. The high-middle level convergence sinking, which cause temperature to go up and the low-level weak upward flow movement made the temperature inversion layer steady, which were the favorable dynamic conditions for the maintaining of the dense fog. At the fog dissipation stage, the atmospheric stratification became unstable potentially because of the southward positive vorticity advection. With the invasion of cold air, the temperature inversion layer was interrupted entirely by the divergence descending movement and the increasing vertical movement. The fog diminished under the coordination of both dynamic and thermal conditions. |
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| Keywords: | Dense fog Diagnostic analysis Physical characteristics Dynamic conditions Thermal conditions |
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