摘要：In order to analyse the relationship of the change of PM 2.5 with each meteorological factor, the PM 2.5 wascollected in eight monitoring sites of Xi’an, and the data of meteorological factors was provided by NOAA.The paper analyses daily changing trend of PM 2.5 , and studies its relevancy with air visibility, air speed,temperature and relative humidity. Results show that PM 2.5 density has negative correlation with air visibilityand speed, good positive correlation with temperature, and when relative humidity is lower than 60%, therelation is positive, while relative humidity is within the range of 61%~100%, the relation is strongly negative.The article provides a reference for fine particulate matter control and its prevention in Xi’an.
