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Spatial and temporal variability in desert dust and anthropogenic pollution in Iraq, 1997-2010
A Alexandra Chudnovsky1,2, Petros Koutrakis2, Alex Kostinski3
1a Tel-Aviv University , Department of Geography and Human Environment , Tel-Aviv , Israel.
Journal of the Air & Waste Management Association (1995)
|December 22, 2016
Summary
Satellite imaging effectively monitors regional air pollution, distinguishing dust storms from urban pollution. This method provides crucial data for areas lacking ground-based air quality monitoring.
Area of Science:
- Environmental science
- Remote sensing
- Atmospheric science
Background:
- Satellite imaging offers continuous global data for monitoring air pollution, unlike sparse ground observations.
- Assessing air quality in regions with limited ground monitoring is challenging but vital.
Purpose of the Study:
- To evaluate satellite data's utility for assessing air pollution concentrations in Iraq.
- To differentiate between dust-related and anthropogenic pollution sources using satellite observations.
Main Methods:
- Utilized SeaWiFS and MODIS Deep Blue (DB) aerosol optical depth (AOD) products from the late 1990s to 2010.
- Correlated AOD and Ångström exponent at 50x50 km resolution to analyze particle size and sources.
- Analyzed tropospheric NO2 densities from OMI satellite data over urban areas.
Main Results:
- AOD and Ångström exponent were generally inversely correlated, indicating significant dust storm contributions.
- Weaker correlations in some areas suggested additional fine particles from anthropogenic sources.
- Elevated NO2 densities over cities confirmed anthropogenic pollution contributions.
Conclusions:
- Satellite data can effectively estimate relative pollution levels and identify pollution sources in data-scarce regions.
- This approach is valuable for future health studies investigating pollution exposure in inaccessible areas.
