广西贺州市城区空气质量与气象条件的关系研究

Study on the relationship between air quality and meteorological conditions in Hezhou City

利用2015-2017年贺州市环境监测数据和气象观测资料,分析研究空气质量与大气环流形势、气象要素之间的对应关系,结果表明:污染天气具有明显的月度变化和季节变化气候特征,冬季为污染天气出现的主要季节;城区空气质量与日雨量、日平均气温、相对湿度和平均风速呈负相关,与气压呈正相关,降水、高温、风速加大对贺州市污染物清除有利;当贺州市受变性冷高压影响、弱冷空气渗透、西南暖低压控制、锋前暖低压影响时,容易导致污染物聚集,产生污染天气。秋季晴空辐射较强时,容易导致贺州市出现以臭氧为主要污染物的光化学污染天气。

Based on the environmental monitoring data and meteorological observation data of Hezhou City from 2015 to 2017,the corresponding relationship between air quality,atmospheric circulation situation and meteorological elements was analyzed.The results showed that the pollution weather had obvious monthly and seasonal climate characteristics,and winter was the main season of pollution weather.The air quality of urban area was negatively correlated with daily rainfall,daily average temperature,relative humidity and average wind speed,and positively correlated with air pressure.Precipitation,high temperature and increasing wind speed were beneficial to the removal of pollutants in Hezhou.When Hezhou was affected by denatured cold high pressure,weak cold air infiltration,southwest warm low pressure and warm low pressure before the front,it was easy to cause pollutant accumulation and pollution weather.When the clear air radiation was strong in autumn,it was easy to cause the photochemical pollution weather with ozone as the main pollutant in Hezhou City.