Study on the Scale Effect of PM2.5 Concentration for City Based on Fractal Theory——A Case Study of Changsha
Data of PM2.5 of Changsha in 2016 were analyed to examine the temporal characteristics, and investigated the fractalcharacteristics of di?erent time scales with the method of Detrended ?uctuation analysis method. It was exhibited that there is anobvious long-range correlation which exist in di?erent time scales of PM2.5, and it is one of evidence that PM2.5 evolution has fractalcharacteristics.