EIA 2006 |
Society for Environmental Information Sciences
Environmental Informatics Archives
ISSN 1811-0231 /
ISEIS Publication Series Number P002
2006 ISEIS. All
Paper EIA06-032, Volume 4
(2006), Pages 354-360
Mapping of Pollutant Concentrations by Combining Satellite-based and Ground -based Measurements in Ontario, Canada
J. Tian and D. M. Chen*
Department of Geograhy, Queen's University, Kingston, ON K7L 3N6, Canada. *Corresponding author: email@example.com.
This paper presents a study of examining the correlation between the air quality extracted from remote sensing and the ground monitoring stations of Ontario province, Canada. The total ozone burden (TOB), mass concentration over land (MCL), and aerosol optical thickness (AOD) data extracted from the Moderate Resolution Imaging Spectroradiometer (MODIS) sensor in the Terra Satellite were compared with the ground-based ozone concentration (GOC) and the fine particular matter (PM2.5) data of 2003. The results showed that AOD was most strongly related with coincident hourly PM2.5. The AOD and PM2.5 were related far stronger in summer than in winter in which they were nearly independent. The correlation between MCL and PM2.5 appeared very weak either in summer or in winter. TOB and coincident hourly GOC have shown their fairly strong correlation in day over both summer and winter. More particularly, the correlation was slightly stronger in summer than in winter. TOB and coincident hourly GOC seem independent at night over both summer and winter. It was found that the current number and locations of ground monitoring stations were not enough to catch the regional air quality changes. The air quality distribution obtained from satellite images has a much better correspondence with the regional morphology than those interpolated from ground measurements.
Keywords: air pollution, remote sensing, MODIS, ground-measurement, correlation
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