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Recent Large Reduction in Sulfur Dioxide Emissions from Chinese Power Plants Observed by the Ozone Monitoring InstrumentThe Ozone Monitoring Instrument (OMI) aboard NASA's Aura satellite observed substantial increases in total column SO2 and tropospheric column NO2 from 2005 to 2007, over several areas in northern China where large coal-fired power plants were built during this period. The OMI-observed SO2/NO2 ratio is consistent with the SO2/ NO2, emissions estimated from a bottom-up approach. In 2008 over the same areas, OMI detected little change in NO2, suggesting steady electricity output from the power plants. However, dramatic reductions of S0 2 emissions were observed by OMI at the same time. These reductions confirm the effectiveness of the flue-gas desulfurization (FGD) devices in reducing S02 emissions, which likely became operational between 2007 and 2008. This study further demonstrates that the satellite sensors can monitor and characterize anthropogenic emissions from large point sources.
Document ID
20110007791
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Li, Can
(Maryland Univ. College Park, MD, United States)
Zhang, Qiang
(Argonne National Lab. IL, United States)
Krotkov, Nickolay A.
(Maryland Univ. Baltimore County Baltimore, MD, United States)
Streets, David G.
(Argonne National Lab. IL, United States)
He, Kebin
(Tsinghua Univ. Bejing, China)
Tsay, Si-Chee
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Gleason, James F.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 25, 2013
Publication Date
April 1, 2010
Publication Information
Publication: Geophysical Research Letters
Volume: 37
Subject Category
Environment Pollution
Distribution Limits
Public
Copyright
Other

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