Study On The Effect Of Aerosol On Urban Heat Island Intensity

City’s environmental problems have become an important issue of urban sustainable development with the further development of urbanization.One of the most serious problems in urban environment is the problem of urban heat island.In recent years,aerosol is a combination of natural environment and human activities in recent years,artificial aerosol for the environmental impact of more and more big,these man-made aerosols enhance the scattering and absorption of solar radiation,the solar radiation absorption in the atmosphere and the influence of surface to reach the earth,having some impact on urban heat island problem.The problem of the influence of aerosols on the strength of the heat island effect,using GIS and remote sensing technology,on the basis of a variety of remote sensing data to obtain aerosol optical city heat island intensity to be two research variables,finally analyzes the two,get the influence of aerosols on city heat island intensity situation,and according to the analysis of relevant information on the mechanism of the effect.The concrete realization is based on the year 2014 in Wuhan city of the 13 districts as the research object,the basic situation of the study area the study area and determine the division of investigation,then according to ten days,month,quarter time units for data preparation.The main contents of this paper are as follows:(1)aerosol optical depth independent on other data.According to the calculation of leaf area index of the empirical orthogonal function of surface reflectance method,the appropriate improvement,the national land surface classification database accord with the situation of China as support vector data,study the use of aerosol optical thickness,a does not depend on the photometer MODIS aerosol optical thickness inversion method of aerosol data station.The final acquisition of experimental area in Wuhan city of 13 districts.(2)a method to obtain the temperature of domestic satellite is presented.With the aid of the Krikin interpolation method combined with the FY-3C satellite data and the ground automatic station data,and combining with the advantages of the real temperature observation and satellite image data of the automatic station,the temperature inversion.(3)the study of heat island intensity index and the evaluation of heat island intensity.According to the results of temperature inversion,the absolute heat island intensity(AIUH),the urban heat island intensity index(IUH)and the heat island intensity index(IUHI)were calculated according to the formula of absolute heat island intensity.(4)the mathematical model of the effect of aerosol on heat island intensity.Try to use the scatter space analysis,correlation analysis,regression analysis and gradient density segmented field simulation model method,the statistical study of aerosol effects on city heat island intensity,finally get the conclusion.According to the above researches,we find that the empirical orthogonal functions,the selection of inversion results and foundation Aeronet sites are basically the same,surface temperature and ground temperature are basically the same site,two kinds of inversion algorithms have certain reliability.It is found that the aerosol is the absorption of heat radiation,the heat island intensity is mainly positive correlation,the urban area is greater than the suburbs.A negative correlation was found in the few months of seasonal exchange.Monitoring of environmental problems is a widespread problem.This is only a city from a perspective of aerosol effects on heat island intensity,provides a real case using remote sensing and GIS technology to complete the environmental monitoring,this paper tries to give a coherent system of experimental methods,hoping to cast a brick to reference role for further the study on environmental monitoring.