冀东地区重污染天气分型及污染源研究  

Typing and Source Analysis of Heavy Polluted Weatherin Eastern Hebei Province

作　　者：张婉莹[1] 张铄 郭子晗 侯书勋 Zhang Wanying;Zhang Shuo;Guo Zihan;Hou Shuxun(Tangshan Meteorological Bureau,Tangshan 063000,China)

机构地区：[1]唐山市气象局,河北唐山063000

出　　处：《环境科学与管理》2024年第5期58-63,共6页Environmental Science and Management

摘　　要：利用2017年-2020年唐山、承德、秦皇岛空气质量监测站资料和NCEP再分析资料,对冀东地区重污染天气进行天气学分型,并利用CAMx-PSAT模拟分析不同天气形势下唐山市PM_(2.5)来源和输送贡献,结果表明:冀东地区重污染天气类型可分为均压场型、西北高压型和低压辐合型。唐山市PM_(2.5)浓度贡献以本地排放最高,外来输送主要来自天津,廊坊次之,凌晨至上午周边输送明显,其中在02-08时之间,输送贡献可达40%~70%。从污染物输送路径来看,均压型及低压辐合型重污染过程的周边输送以西南路径为主,高压型以西南偏西路径为主。另外,均压场型周边输送相对于高压型及低压辐合型更为明显。Based on the data of air quality monitoring stations in Tangshan,Chengde and Qinhuangdao and NCEP reanalysis data from^(2)017 to 2020,the synoptic classification of heavy pollution weather in eastern Hebei was carried out.CAMx-PSAT simulation was used to analyze the source and transport contribution of PM_(2.5) in Tangshan during the heavy pollution process under different weather conditions.The results show that the heavy pollution weather types in eastern Hebei can be roughly divided into uniform pressure field type,northwest high pressure type and low pressure convergence type.The largest contribution to PM_(2.5) concentration in Tangshan is local emissions,and the external transport is mainly from Tianjin,followed by Langfang.The transport from the early morning to the morning is obvious,and the transport contribution can reach 40%~70%between 02-08 o clock.From the perspective of pollutant transportpath,the peripheral transport of uniform pressure type and low pressure convergence type heavy pollution process is mainly southwest path,and the peripheral transport of high pressure type heavy pollution process is mainly southwest west path.In addition,the peripheral transport of uniform pressure field type is more obvious than that of high pressure type and low pressure convergence type.

关 键 词：重污染 天气分型 污染源 CAMX 

分 类 号：X51[环境科学与工程—环境工程]