淮河流域PM2.5和PM10比率的时空变化

Change Trend of PM2.5 and PM10 Ratio in Huaihe Basin

运用Theil-Sen斜率估计法和Mann-Kendall趋势检验法求出淮河流域23个监测点PM2.5与PM10的变化规律,结果表明,17个地区的空气质量有所改善。与不同气象指标的相关分析表明,空气中PM2.5、PM10的含量与降水量、湿度和温度呈负相关关系,与气压和风速呈正相关关系。夏季空气中悬浮物质含量较低,表明降雨在净化空气中起主导作用。与空气中次生气溶胶的相关分析结果表明,淮河流域空气中的悬浮物质主要来源于煤炭燃烧和交通运输。

The Theil-Sen slope estimation method and the Mann-Kendall trend test method were used to obtain the PM2.5 and PM10 change rules of the 23 monitoring points in the Huaihe River Basin, indicating that the air quality in 17 of them has improved. The correlation analysis with different meteorological indexes shows that the contents of PM2.5 and PM10 in the air are negatively correlated with precipitation, humidity and temperature, and positively correlated with air pressure and wind speed. The low content of suspended matter in the air in summer indicates that rainfall plays a leading role in air purification. The results of correlation analysis with secondary aerosols in the air show that the suspended matter in the air of Huaihe River Basin mainly comes from coal combustion and transportation.