Relationship between aerosol characteristics and altitude based on multi-measurements and model simulations

Abstract

The suspending particulate matter (PM 2.5 ) is a typical indicator of small particles in the atmosphere. Accordingly in order to monitor the air quality, sampling of PM 2.5 has been widely undertaken over the world, especially in the urban cities. On the other hand, it is known that the sun photometry provides us with the aerosol information, e.g. aerosol optical thickness (AOT), aerosol size information and so on. Simultaneous measurements of PM 2.5 and the AOT have been performed at a NASA/AERONET (Aerosol Robotics Network) site in urban city of Higashi-Osaka in Japan since March 2004, and successfully provided a linear correlation between PM 2.5 and AOT in separately considering with several cases, e.g. usual, anthropogenic aerosols, dust aerosols and so on. This fact suggests that the vertical distribution also should be taken into account separately for each aerosol type. In this work, vertical profiles of atmospheric aerosols are considered based on combination use of photometric data with AERONET, LIDAR (Light Detection and Ranging) measurements and model simulations.

Seasonal Distribution of AOT and Its Relationship with Air Pollutants in Central Bangladesh Using Remote Sensing and Machine Learning Tools

“…The earth's atmosphere is a complex fusion of various liquid, solid and gaseous substances [1][2][3]. Aerosol Optical Thickness (AOT) is the quantitative measure of the aerosol particles present in the earth's atmosphere, which represents the extinction of solar radiation by scattering and absorbing it when it passes through the atmosphere [4][5][6]. In the climate system, AOT exhibits significant influence by reflecting, scattering, and absorbing both the incident and reflected radiation.…”