开远市颗粒物浓度变化与气象条件的关系探讨

Study on the Relationship between the Changes of Particle Concentration and Meteorological Condition in Kaiyuan City

  • 摘要: 利用2010年1月1日—2018年12月31日开远市空气颗粒物PM10浓度、气象要素对开远市进行气象要素与空气颗粒物浓度相关性分析。结果表明,城区颗粒物质量浓度具有很明显的时间相关性。昼间的浓度高于夜间,全天呈"双峰型"结构,在中午10∶00左右形成高峰值,在下午2∶00左右形成第二次峰值。夏季,由于雨水冲刷的作用,使得颗粒物浓度降低,峰值和谷值较为平缓,而冬季浓度变化比较剧烈。气象要素与颗粒物PM10浓度有着显著的相关性。气压、风速、温度和相对湿度对空气颗粒物的浓度变化有很大的影响,并且相关性也存在着明显的季节性变化。

     

    Abstract: The correlation between the changes of PM10 concentration and meteorological elements were analyzed using the data from January 1,2010 to December 31,2018. The results indicated that there was a significant correlation between the above time period and PM10 concentration. The concentration in the daytime is higher than in night. A double-peaks diagram was drawn in a whole day. The first peak appeared around 10 am in the morning,and the second peak occurred about 2 pm in the afternoon. Due to the rainfall that reduced the particle concentration in air,the variation of the peak and the valley became closer in summer than that in winter. The significant correlation between PM10 and meteorological elements was found. Pressure,wind speed,temperature,and relative humidity showed obvious impacts on the changes of PM10 Meanwhile,the correlation dramatically varied as seasons changed.

     

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