Atmospheric Composition On PM_2.5Pollution Analysis And Regional Analysis

PM2.5is one of the most important pollutants in the air. At present, PM2.5on health hazards are becoming more and more obvious.Researches on PM2.5is mainly concentrated on the PM2.5of chemical composition, pollution analysis, the impact on human health and the like. But the lack of influence of atmospheric composition S O2, NO2, PM10, CO, O3and precipitation for PM2.5, while domestic use Gauss diffusion model for air pollution are also limited to one area, and no research sources identified for different regions. For this reason this paper, these two problems have been studied, the conclusion of air pollution provides a theoretical basis, it can save manpower and resources for the cure of air pollution, but also to provide a reference for urban planning. The main contents of this paper have:(1)Based on Wuhan:2013.01.01-2013.08.26total of238data points GAMMA impact on the number of models and multivariate time series of atmospheric constituents of PM2.5concentration values found: SO2, NO2, PM10, the impact on CO PM2.5of large and correlated positively affected, and O3and precipitation for small PM2.5affect and influence negatively correlated.(2)Based on Chang’an District of Xi’an, Lintong District,···,High Voltage Swit chgear Factory thirteen monitoring points:2013.01.01-2013.04.26Total116×13data points using cluster analysis study area classification, get three categories:moderately polluted area (Chang’an District, Lintong District, hamlet, Qujiang Cultural Group); severe pollution area (Xingqing district, through the open area, the textile city, Yanliang); serious pollution area (city People’s Stadium, Guangyuntan, high-tech Western, marsh, high voltage switchgear factory). While the use of multivariate time series affect atmospheric composition on PM2.5concentration values of the data points three regions found: in heavily polluted regions corresponding carbides and PM10coefficient is large, and moderate contaminated area carbides and PM10correspondingly smaller. (3)Based on three kinds of areas, using Gaussian diffusion model to identify pollution sources, the pollution sources of moderate pollution area is qujiang cultural group; the pollution sources of severe pollution area is jingkai district; the pollution sources of serious pollution area is high voltage company switchgear factory.