Estimation of PM2.5 Spatial Distribution Based on Kriging Interpolation

Abstract. The air quality in Beijing City is getting more and more attention. Aimed at analyzing distribution of PM2.5 concentration, this study adopts thirty-two observation sites PM2.5 concentration data in six days from Beijing City Environmental Protection Bureau. By kriging interpolation method, 100100 × unknown points ’ concentrations have been predicted and PM2.5 spatial distribution drawings have been plotted. The results show that PM2.5 concentration takes the gradient distribution. South area is higher than north while west area is higher than east. Further, we discussed reasons for this distribution