气象2018，Vol.44Issue(3)：408-415,8.DOI:10.7519/j.issn.1000-0526.2018.03.007
长江江苏段江面雾的特征和预报着眼点
Characteristics and Forecasting Focus for River Fog in Jiangsu Section of Yangtze River
摘要
Abstract
Using the minutely data including visibility,relative humidity,temperature and wind speed of 36 automatic weather stations along the Yangtze River in Jiangsu Province during 2010-2013,the characteristics of river fogs are analyzed.The results show that river fog mainly occurs in June,November and January,formed from 19:00 BT to the next 07:00 BT,during which the fog is the thickest in 02:00-04:00 BT and gets to end from 06:00 BT to 12:00 BT,so the fog duration is 3-9 h.When fog occurs,relative humidity is 85％ or higher,temperature is 5-19℃ in spring,18-26℃ in summer,7-23℃ in autumn and 0-11℃ in winter.As for the wind speed,it is below 5 m · s 1 in spring,summer,autumn,and about 6 m · s-1 in winter.Specifically,the fog tends to occur with the wind direction of NNE-E and wind speed 1-2 m · s-1 in spring,the wind direction of NNE-ESE and wind speed 0.3-1 m · s-1 in summer,the wind direction of NNE-NE and E-ESE,wind speed 0.3-2 m · s-1 in autumn,and the wind direction of NNE-NE and WNW,wind speed 1-2 m · s-1 in winter.In addition,by analyzing the visibility changes of the first station in the fog,we found that there are obvious "trunk-like" characteristics before river fogs develop.Such features could provide the basis for the operation of early warning and forecasting of river fogs.关键词
江面雾/统计分析/“象鼻形”先期振荡/预报Key words
river fog/statistical analysis/"trunk-like" fluctuating forepart/forecasting分类
天文与地球科学引用本文复制引用
田小毅,朱承瑛,张振东,鲍婧..长江江苏段江面雾的特征和预报着眼点[J].气象,2018,44(3):408-415,8.基金项目
江苏省气象局科研基金项目(KM201405)、2016年中国气象局小型建设项目“长江黄金水道及近海航运交通气象服务系统建设”和北极阁基金项目(BJG201706)共同资助 （KM201405）
