Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/6091
Title: Modeling of aerosol vertical profiles using GIS and remote sensing
Authors: Wong, MS 
Nichol, JE 
Lee, KH
Keywords: Aerosol optical thickness
Extinction coefficient
GIS
Modeling
Visualization
Issue Date: 4-Jun-2009
Publisher: Molecular Diversity Preservation International (MDPI)
Source: Sensors, 4 June 2009, v. 9, no. 6, p. 4380-4389 How to cite?
Journal: Sensors 
Abstract: The use of Geographic Information Systems (GIS) and Remote Sensing (RS) by climatologists, environmentalists and urban planners for three dimensional modeling and visualization of the landscape is well established. However no previous study has implemented these techniques for 3D modeling of atmospheric aerosols because air quality data is traditionally measured at ground points, or from satellite images, with no vertical dimension. This study presents a prototype for modeling and visualizing aerosol vertical profiles over a 3D urban landscape in Hong Kong. The method uses a newly developed technique for the derivation of aerosol vertical profiles from AERONET sunphotometer measurements and surface visibility data, and links these to a 3D urban model. This permits automated modeling and visualization of aerosol concentrations at different atmospheric levels over the urban landscape in near-real time. Since the GIS platform permits presentation of the aerosol vertical distribution in 3D, it can be related to the built environment of the city. Examples are given of the applications of the model, including diagnosis of the relative contribution of vehicle emissions to pollution levels in the city, based on increased near-surface concentrations around weekday rush-hour times. The ability to model changes in air quality and visibility from ground level to the top of tall buildings is also demonstrated, and this has implications for energy use and environmental policies for the tall mega-cities of the future.
URI: http://hdl.handle.net/10397/6091
EISSN: 1424-8220
DOI: 10.3390/s90604380
Rights: © 2009 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland. This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
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