海口市PM_(2.5)演变特征及其与气象因素的关系  

Evolution of PM_(2.5) in Haikou and its relationship with weather factors

作　　者：唐家翔[1,2] 符传博[1,2] 杨仁勇[1,2,3] 林建兴 TANG Jiaxiang;FU Chuanbo;YANG Renyong;LIN Jianxing(Hainan Meteorological Observatory,Haikou Hainan 570203;Key Laboratory of South China Sea Meteorological Disaster Prevention and Mitigation of Hainan Province,Haikou Hainan 570203;College of Atmospheric Sciences,Nanjing University of Information Science and Technology,Nanjing Jiangsu 210044)

机构地区：[1]海南省气象台,海南海口570203 [2]海南省南海气象防灾减灾重点实验室,海南海口570203 [3]南京信息工程大学大气科学学院,江苏南京210044

出　　处：《环境污染与防治》2018年第4期445-449,454,共6页Environmental Pollution & Control

基　　金：海南省气象局科技创新项目(No.HN2013MS02);中国气象局预报员专项(No.CMAYBY2018-059)

摘　　要：利用海口市PM_(2.5)逐时数据、常规气象观测资料、FNL全球分析资料和HYSPLIT模式,对比分析海口市PM_(2.5)变化特征及其与气象因素的关系。结果表明:(1)2014年1月1日至2016年6月30日,海口市PM_(2.5)日均值以达到《环境空气质量标准》(GB 3095—2012)一级标准为主;年均值为23μg/m^3,达到GB 3095—2012二级标准;月均值整体呈周期性波动,秋冬季高、春夏季低;季节均值排序为冬季>秋季>春季>夏季。(2)降水对PM_(2.5)有清除作用;风速加大会使PM_(2.5)浓度减小。(3)污染个例分析表明,海口市PM_(2.5)浓度增大,是因为东北风将外地污染物传输经过本地,并配合有利的天气形势,最终造成大气污染事件的发生。The change characteristics of PM 2.5 concentration and its relationship with meteorological factors were analyzed using hourly data of PM 2.5 concentration in Haikou,conventional meteorological observation data,FNL global analysis data and HYSPLIT model.The results showed that:(1)from January 1,2014 to June 30,2016,the daily average level of PM 2.5 concentration in Haikou was almost centered on one level national standards of“Ambient air quality standards”(GB 3095-2012);the annual PM 2.5 value was 23μg/m 3,which reached level two standard of GB 3095-2012.Monthly PM 2.5 showed periodic fluctuation:peak values appeared in autumn and winter,valley values appeared in spring and summer;seasonal average value was sorted from large one to small one,which was winter>autumn>spring>summer.(2)Precipitation was effective for eliminating on PM 2.5;the accelerated wind could make the concentration of PM 2.5 decrease.(3)The pollution case analysis showed that the PM 2.5 concentration increased in Haikou was caused by the northeast wind made foreign pollutants transported through local,then cooperating with the favorable weather situation,causing the occurrence of air pollution incidents finally.

关 键 词：PM2.5 气象因素 HYSPLIT模式 大气污染 海口市 

分 类 号：X16[环境科学与工程—环境科学] X513