海洋预报2023，Vol.40Issue(6)：41-50,10.DOI:10.11737/j.issn.1003-0239.2023.06.005
2007-2020年威海机场4-9月平流低云的变化特征及影响因子分析
Characteristics and impact factors of advection low clouds in Weihai airport from April to September during 2007-2020
摘要
Abstract
This paper analyzes the interannual and monthly variation characteristics of advection low clouds from April to September during 2007 to 2020(lack of data in 2014)at Weihai airport,and reveals the atmospheric circulation conducive to the emergence of advection low clouds and its possible influencing factors.The results show that:There are 39.8 advection low cloud days in Weihai airport every year.The climatological number of advection low cloud days increases from April to July,and gradually decreases from August to September,showing a single peak structure.Advection low clouds appear accompanied by light fog and advection fog,with a total frequency of 79.4%.The southwest wind is the main wind direction when advection low clouds appear,and the wind direction in the range of 180°～220° accounts for 50.0%.Under the influence of a stable synoptic situation of high pressure in the East and low pressure in the west,the area of Weihai airport is conducive to the emergence of advection low clouds.At this time,the sea surface temperature in the southern sea area of Shandong Peninsula is relatively low,and there is an obvious warm advection on it.The structure of warm air up and cold air down is conducive to the stability of the atmosphere.The atmosphere releases heat to the ocean and cools down,which is easy to form low clouds and maintain when the air landing on the southern side of Shandong Peninsula.The strength of the Kuroshio on the interannual scale is a good indication of the number of advection low cloud days of Weihai airport.关键词
威海机场/平流低云/大气环流/影响因子Key words
Weihai airport/advection low cloud/atmospheric circulation/impact factors分类
海洋科学引用本文复制引用
宋鹏鹏,赵传湖..2007-2020年威海机场4-9月平流低云的变化特征及影响因子分析[J].海洋预报,2023,40(6):41-50,10.基金项目
国家自然科学基金项目(41975061). （41975061）
