北京大学学报（自然科学版）2019，Vol.55Issue(5)：898-905,8.DOI:10.13209/j.0479-8023.2019.056
海口地区 2018 年 2 月持续低能见度过程的气象条件分析
Meteorological Characteristics of Prolong Low-Visibility Events in Haikou during February 2018
摘要
Abstract
To understand the meteorological characteristics associated with the prolong low-visibility events occurring in Haikou and Qiongzhou Strait during February 2018, we systematically analyzed the visibility data, surface meteorological observations, sounding data and reanalysis data. It’s found that the low-visibility events in winter in Haikou typically occurred under relatively warmer and moister conditions. In winter, the visibility of Haikou was significantly anti-correlated with relative humidity, temperature and thermal stability, and was significantly correlated with wind speed and boundary layer height. No significant correlation was found between visibility and PM2.5 concentration. At the 925 hPa level, when Haikou was located to the south of high-pressure system, good visibility could be observed associated with the northeasterly winds; in contrast, when Haikou was controlled by the southeasterly winds, the warm and moisture air mass could be brought to Haikou, favoring the occurrence of low-visibility events.关键词
海口/ 低能见度/ 环流场/ 大气边界层Key words
Haikou/ low-visibility/ synoptic patterns/ planetary boundary layer引用本文复制引用
艳艳,缪育聪,李建,郭建平..海口地区 2018 年 2 月持续低能见度过程的气象条件分析[J].北京大学学报（自然科学版）,2019,55(5):898-905,8.基金项目
国家重点研发计划(2017YFA0603501, 2017YFC1501701)、国家自然科学基金(41705002, 41771399, 41875181)和中国气象科学研究院基本科研业务费专项基金(2017Y002, 2017Z005)资助 （2017YFA0603501, 2017YFC1501701）
