Preliminary results of the aerosol optical depth retrieval in Johor, Malaysia

8th International Symposium of the Digital Earth

地球科学;计算机科学

Lim, H.Q.^1 ; Kanniah, K.D.^1 ; Lau, A.M.S.^1

Department of Remote Sensing, Faculty of Geoinformation and Real Estate, Universiti Teknologi Malaysia, Malaysia^1

关键词: Aerosol optical depths;    Aerosol properties;    Aerosol retrieval algorithms;    Aerosol robotic networks;    Air quality monitoring;    Industrial activities;    Moderate resolution imaging spectroradiometer;    Satellite observations;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/18/1/012085/pdf
DOI  :  10.1088/1755-1315/18/1/012085

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Monitoring of atmospheric aerosols over the urban area is important as tremendous amounts of pollutants are released by industrial activities and heavy traffic flow. Air quality monitoring by satellite observation provides better spatial coverage, however, detailed aerosol properties retrieval remains a challenge. This is due to the limitation of aerosol retrieval algorithm on high reflectance (bright surface) areas. The aim of this study is to retrieve aerosol optical depth over urban areas of Iskandar Malaysia; the main southern development zone in Johor state, using Moderate Resolution Imaging Spectroradiometer (MODIS) 500 m resolution data. One of the important steps is the aerosol optical depth retrieval is to characterise different types of aerosols in the study area. This information will be used to construct a Look Up Table containing the simulated aerosol reflectance and corresponding aerosol optical depth. Thus, in this study we have characterised different aerosol types in the study area using Aerosol Robotic Network (AERONET) data. These data were processed using cluster analysis and the preliminary results show that the area is consisting of coastal urban (65%), polluted urban (27.5%), dust particles (6%) and heavy pollution (1.5%) aerosols.