In this paper, hourly observations of precipitation, wind, and PM2.5 and PM10 concentrations in Qinhuangdao from 2016 to 2018 were used to study the effects of precipitation and wind on PM2.5 and PM10 concentrations. The results show that precipitation has a certain wet scavenging effect on PM2.5 and PM10, and the scavenging effect on PM10 is greater than that on PM2.5. Precipitation above moderate rainfall is concentrated from May to September, and light rain in winter increases the concentration of pollutants. The changes of PM2.5 before and after precipitation are related to the initial concentration of PM2.5 before precipitation, precipitation intensity, and precipitation duration. The scavenging effect of precipitation on PM10 is closely related to the initial concentration of PM10 before precipitation. The higher the initial concentration of PM10 is, the greater the removal amount of precipitation will be. Moderate or above pollution weather mainly occurs in the northeast, southwest, and west wind meteorological conditions; the more westerly the wind, the more the pollution; north wind and northwest wind have the most obvious scavenging effect on PM2.5 and Pm10; when the wind speed increases to 2 m/s, the concentration of PM2.5 and PM10 can be reduced; when the wind speed is more than 4 m/s, the concentration of PM10 increases under the south wind, southeast wind, east wind, and northeast wind.

中文翻译：

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降水和风对大气中PM2.5和PM10的影响分析

本文利用2016年至2018年每小时对秦皇岛市降水，风以及PM2.5和PM10浓度的观测资料，研究了降水和风对PM2.5和PM10浓度的影响。结果表明，降水对PM2.5和PM10具有一定的湿清除作用，对PM10的清除作用大于对PM2.5的清除作用。5月至9月是中等降雨以上降水的集中地，冬季的小雨增加了污染物的浓度。沉淀前后PM2.5的变化与沉淀前PM2.5的初始浓度，沉淀强度和沉淀持续时间有关。沉淀物对PM10的清除作用与沉淀前PM10的初始浓度密切相关。PM10的初始浓度越高，沉淀物的去除量就越大。中度或以上污染天气主要发生在东北，西南和西风的气象条件下。风越西风，污染越多；北风和西北风对PM2.5和Pm10的清除作用最明显。当风速增加到2 m / s时，可以降低PM2.5和PM10的浓度；当风速大于4 m / s时，PM10的浓度在南风，东南风，东风和东北风下增加。北风和西北风对PM2.5和Pm10的清除作用最明显。当风速增加到2 m / s时，可以降低PM2.5和PM10的浓度；当风速大于4 m / s时，PM10的浓度在南风，东南风，东风和东北风下增加。北风和西北风对PM2.5和Pm10的清除作用最明显。当风速增加到2 m / s时，可以降低PM2.5和PM10的浓度；当风速大于4 m / s时，PM10的浓度在南风，东南风，东风和东北风下增加。