Journal article
Satellite remote sensing of particulate matter and air quality assessment over global cities
Atmospheric environment (1994), Vol.40(30), pp.5880-5892
2006
DOI: 10.1016/j.atmosenv.2006.03.016
Abstract
Using 1 year of aerosol optical thickness (AOT) retrievals from the MODerate resolution Imaging Spectro-radiometer (MODIS) on board NASA's Terra and Aqua satellite along with ground measurements of PM
2.5 mass concentration, we assess particulate matter air quality over different locations across the global urban areas spread over 26 locations in Sydney, Delhi, Hong Kong, New York City and Switzerland. An empirical relationship between AOT and PM
2.5 mass is obtained and results show that there is an excellent correlation between the bin-averaged daily mean satellite and ground-based values with a linear correlation coefficient of 0.96. Using meteorological and other ancillary datasets, we assess the effects of wind speed, cloud cover, and mixing height (MH) on particulate matter (PM) air quality and conclude that these data are necessary to further apply satellite data for air quality research. Our study clearly demonstrates that satellite-derived AOT is a good surrogate for monitoring PM air quality over the earth. However, our analysis shows that the PM
2.5–AOT relationship strongly depends on aerosol concentrations, ambient relative humidity (RH), fractional cloud cover and height of the mixing layer. Highest correlation between MODIS AOT and PM
2.5 mass is found under clear sky conditions with less than 40–50% RH and when atmospheric MH ranges from 100 to 200
m. Future remote sensing sensors such as Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) that have the capability to provide vertical distribution of aerosols will further enhance our ability to monitor and forecast air pollution. This study is among the first to examine the relationship between satellite and ground measurements over several
global locations.
Details
- Title: Subtitle
- Satellite remote sensing of particulate matter and air quality assessment over global cities
- Creators
- Pawan Gupta - Department of Atmospheric Sciences, The University of Alabama in Huntsville, Huntsville, AL, USASundar A Christopher - Department of Atmospheric Sciences, The University of Alabama in Huntsville, Huntsville, AL, USAJun Wang - NOAA/UCAR Postdoctoral Fellow, Department of Earth and Planetary Science, Harvard University, MA, USARobert Gehrig - EMPA, Laboratory for Air Pollution, Dubendorf, SwitzerlandYc Lee - University of Hong KongNaresh Kumar - University of Iowa, Iowa City, IA, USA
- Resource Type
- Journal article
- Publication Details
- Atmospheric environment (1994), Vol.40(30), pp.5880-5892
- DOI
- 10.1016/j.atmosenv.2006.03.016
- ISSN
- 1352-2310
- eISSN
- 1873-2844
- Publisher
- Elsevier Ltd
- Grant note
- DOI: 10.13039/100000104, name: National Aeronautics and Space Administration
- Language
- English
- Date published
- 2006
- Academic Unit
- Electrical and Computer Engineering; Civil and Environmental Engineering; Physics and Astronomy; Chemical and Biochemical Engineering
- Record Identifier
- 9984104806402771
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