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Title: OMI air-quality monitoring over the Middle East
Authors: Barkley, Michael
González Abad, Gonzalo
Kurosu, Thomas P.
Spurr, Robert
Torbatian, Sara
Lerot, Christophe
First Published: 11-Apr-2017
Publisher: European Geosciences Union (EGU)
Citation: Atmospheric Chemistry and Physics Discussions, 2017, 17, pp. 4687-4709
Abstract: Using Ozone Monitoring Instrument (OMI) trace gas vertical column observations of nitrogen dioxide (NO2), formaldehyde (HCHO), sulfur dioxide (SO2), and glyoxal (CHOCHO), we have conducted a robust and detailed time series analysis to assess changes in local air quality for over 1000 locations (focussing on urban, oil refinery, oil port, and power plant targets) over the Middle East for 2005–2014. Apart from NO2, which is highest over urban locations, average tropospheric column levels of these trace gases are highest over oil ports and refineries. The highest average pollution levels over urban settlements are typically in Bahrain, Kuwait, Qatar, and the United Arab Emirates. We detect 278 statistically significant and real linear NO2 trends in total. Over urban areas NO2 increased by up to 12 % yr−1, with only two locations showing a decreasing trend. Over oil refineries, oil ports, and power plants, NO2 increased by about 2–9 % yr−1. For HCHO, 70 significant and real trends were detected, with HCHO increasing by 2–7 % yr−1 over urban settlements and power plants and by about 2–4 % yr−1 over refineries and oil ports. Very few SO2 trends were detected, which varied in direction and magnitude (23 increasing and 9 decreasing). Apart from two locations where CHOCHO is decreasing, we find that glyoxal tropospheric column levels are not changing over the Middle East. Hence, for many locations in the Middle East, OMI observes a degradation in air quality over 2005–2014. This study therefore demonstrates the capability of OMI to generate long-term air-quality monitoring at local scales over this region.
DOI Link: 10.5194/acp-2016-784
ISSN: 1680-7367
eISSN: 1680-7375
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © the authors, 2017. This is an open-access article distributed under the terms of the Creative Commons Attribution License ( ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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