20152016年贵港市空气污染与天气形势的关系
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引用本文:何林宴,梁毅进,黄小晏..20152016年贵港市空气污染与天气形势的关系[J].气象与环境科学,2019,42(4):96-102.He Linyan,Liang Yijin,Huang Xiaoyan..Relationship Between Air Pollution and Weather Situation in Guigang from 2015 to 2016[J].Meteorological and Environmental Sciences,2019,42(4):96-102.
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作者单位
何林宴,梁毅进,黄小晏.  
DOI:doi:10.16765/j.cnki.1673-7148.2019.04.014
基金项目:
中文摘要:利用2015-2016年贵港市空气自动监测站空气质量指数、首要污染物等数据及贵港国家气象观测站的常规气象观测资料(风速、湿度、气温等),分析了贵港市2015-2016年空气质量概况及相关气象因子,进而利用合成分析方法对贵港市在不同季节出现不同级别空气污染的天气形势变化进行了分析。分析结果表明:贵港市的首要污染物为PM2.5和PM10,其中12月、12月为贵港市空气污染最严重的月份。各气象要素与空气质量指数相关性较强,风速、气温、降水等气象条件对贵港市的空气质量影响显著。在春、秋、冬季,冷空气南下影响贵港市,500 hPa为持续的下沉运动且850 hPa相对湿度较低及850 hPa由北风转为南风且风速较小时,贵港市极易出现轻度污染以上的天气;当云南一带有南支槽活动时,贵港市易出现重度污染天气。夏季影响贵港市空气质量的主要因素则是热带气旋移动至江苏、浙江一带时,热带气旋的外围下沉气流导致贵港市出现持续下沉运动。此时,受副热带高压系统或者其他天气系统影响,850 hPa风向出现明显转折时,应考虑贵港市出现轻度污染的天气现象。
中文关键词:空气质量指数  天气形势  贵港
 
Relationship Between Air Pollution and Weather Situation in Guigang from 2015 to 2016
Abstract:Based on the data of the daily Air Quality Index (AQI) data,primary pollutant and meteorological data including wind speed,humidity and temperature,etc.during 2015-2016,the general situation of air quality and related meteorological factors were analyzed,and then the weather situation variation of air pollution in different seasons and different levels in Guigang city were analyzed using the synthetic analysis method.The results show that the primary pollutants in Guigang city are PM2.5 and PM10.December,January and February are the most polluted months in the year.The correlation between meteorological elements and AQI are strong.Air quality in Guigang city is affected by wind speed,temperature and precipitation significantly.In winter,spring and autumn,when cold air moves southward and affects Guigang city,with persistent sinking motion in 500 hPa,the relative humidity is low as well as the north wind turns south,and wind speed is small in 850 hPa,light or above air pollution appears easily in Guigang city.Under this condition,southern trough in Yunnan will leads to a heavy pollution in Guigang city.In summer,the main factor affecting air quality is when tropical cyclones move to Jiangsu and Zhejiang,the downdraft on the periphery of the tropical cyclones causes the continuous descending motion in Guigang city.At this time,when the north wind obviously turns south in 850 hPa,affected by the subtropical high pressure or other system,the light air pollution in Guigang city should be considered.
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