HR: 0800h
AN: A21A-0019    [Abstracts]
TI: The "weekend effect" in tropospheric NO2 seen from the Ozone Monitoring Instrument
AU: * Bucsela, E J
EM: bucsela@ix.netcom.com
AF: GEST / UMBC, 5523 Research Park Drive, Suite 320, Baltimore, MD 21228, United States
AU: Wenig, M O
EM: mark.o.wenig@gmail.com
AF: City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, SAR, Hong Kong
AU: Celarier, E A
EM: celarier@redwind.gsfc.nasa.gov
AF: GEST / UMBC, 5523 Research Park Drive, Suite 320, Baltimore, MD 21228, United States
AU: Gleason, J F
AF: NASA Goddard Space Flight Center, 8600 Greenbelt Road, Greenbelt, MD 20771, United States
AB: The Ozone Monitoring Instrument has gathered daily global data on NO2 and other atmospheric trace gases since its launch on the EOS Aura satellite in 2004. The large accumulated data set makes it possible to monitor changes of both meteorological and anthropogenic origin in tropospheric NO2 amounts. In particular, averages on time scales on the order of a year show a distinct "weekend effect" in NO2 variation, with smaller NO2 amounts seen on Saturday and/or Sunday than on the remaining weekdays. Using the OMI NO2 Standard Product (SP), we examine this effect in relation to geopolitical boundaries and investigate implications for identifying sources. We also use the SP data to find evidence for other short-term anthropogenic changes in NO2 emissions over heavily polluted regions including the United States, Europe and China.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0365 Troposphere: composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting