眉山市一次秋季持续大气污染过程气象条件分析  

Analysis of Meteorological Conditions of a Continuous Air Pollution Process in Meishan in Autumn

作　　者：罗静兰 唐东民 胡超 徐卫红 高艺珂 彭学琴 LUO Jing-lan;TANG Dong-min;HU Chao;XU Wei-hong;GAO Yi-ke;PENG Xue-qin(Meishan Meteorological Bureau,Meishan,Sichuan 620010,China;Meishan eco-environmental monitoring central Station of sichuan province,Meishan,Sichuan 620010,China)

机构地区：[1]眉山市气象局,四川眉山620010 [2]四川省眉山生态环境监测中心站,四川眉山620010

出　　处：《四川环境》2022年第6期116-122,共7页Sichuan Environment

基　　金：眉山市科技计划资助(2021YS01)。

摘　　要：为深入了解眉山市不同气象要素对大气污染过程的影响,基于空气质量数据、地面气象资料、探空数据和NCEP提供的再分析资料,利用时间序列分析法、相关性分析和Holzworth提出的干绝热法等,从不同气象条件对眉山市2020年11月9~18日这段污染天气过程进行分析。结果表明:静稳的天气环流背景非常有利于污染物的积累和维持,过程中AQI与PM_(2.5)浓度变化表现为高度一致,8:00~12:00、19:00~23:00、0:00~2:00是污染易出现时段;ρ(PM_(2.5))与不同气象要素间的相关性有明显差异。研究结果为眉山市大气污染潜势预报提供了依据,也为大气污染治理和开展成都平原经济区区域联防提供参考。In order to deeply understand the impact of different meteorological elements on the air pollution process in Meishan City,based on air quality data,ground meteorological data,radiosonde data and reanalysis data provided by NCEP,the pollution weather process in Meishan City from November 9 to 18,2020 is analyzed from different meteorological conditions by using time series analysis method,correlation analysis and dry insulation method proposed by Holzworth.The results showed that the static and stable weather circulation background is very conducive to the accumulation and maintenance of pollutants,and the variations of AQI and PM_(2.5) concentration are highly consistent in the process,and the periods of 8:00~12:00,19:00~23:00 and 0:00~2:00 are prone to pollution.The correlation between ρ(PM_(2.5))and different meteorological elements is significantly different.The research results provide a basis for the prediction of air pollution potential in Meishan City,and also provide a reference for air pollution control and regional joint prevention in Chengdu Plain Economic Zone.

关 键 词：PM_(2.5) 气象要素 相关性分析 混合层高度 

分 类 号：X51[环境科学与工程—环境工程]