摘要
本文利用常规气象观测资料、NCEP再分析资料对2016年12月31日至2017年1月4日中国东部持续近5天的大范围强浓雾过程进行了分析,重点对强浓雾的传播与扩展机制进行了诊断研究。结果表明:这次浓雾过程以1日晚间冷高压南下为分界点,在高压南下之前强浓雾范围局限于河北中南部,高压南下之后,强浓雾增强并大范围传播,影响江苏、安徽、河南、河北、山东等多个省。冷高压南下导致低层逆温层加强,逆温区范围扩大,是强浓雾得以大范围传播的重要条件。由海上经江苏、安徽、河南至河北的水汽平流输送则为浓雾的大范围传播提供了充足的水汽条件。
Based on conventional observation data, NCEP reanalysis data, a massive dense fog process lasting from 31 December 2016 to 4 January 2017 in Eastern China are analyzed with the focus on propagation and extension mechanism. The results show that the dense fog process took cold anticyclone moving south on the evening of 1 January as a demarcation point. Before the cold anticyclone moved south, dense fog was limited to southern and central part of Hebei Province. After the cold anticyclone moved south, dense fog enhanced and spread widely, affecting many provinces including Jiangsu, Anhui, Henan, Hebei and Shandong, etc. The dense fog spread in a large range by cold anticyclone moving south, causing the lowlevel temperature inversion to be strengthened and the range of the inversion area to be expanded. The water vapor transport from the sea through Jiangsu, Anhui and Henan to Hebei provided sufficient water vapor for the wide spread of the dense fog.
作者
邵禹晨
张雪蓉
王博妮
濮梅娟
SHAO Yuchen;ZHANG Xuerong;WANG Boni;PU Meijuan(Nanjing University of Information Science and Technology, Nanjing 210044;Key Laboratory of Transportation Meteorology, CMA,Nanjing 210008;Jiangsu Institute of Meteorological Sciences, Nanjing 210008;Jiangsu Meteorological Service Centre, Nanjing 210008;Jiangsu Meteorological Observatory, Nanjing 210008)
出处
《气象》
CSCD
北大核心
2019年第4期496-510,共15页
Meteorological Monthly
基金
国家自然科学基金项目(41575135和41340042)
江苏省气象局科研项目(BK201807)
江苏省气象局预报员专项(JSYBY2013305)共同资助
关键词
强浓雾
强逆温
水汽条件
大范围传播
dense fog
strong temperature inversion
water vapor condition
wide spread
