HR: 14:30h
AN: A12C-03    [PDF]
TI: Science Goals of EOS-Aura's Ozone Monitoring Instrument (OMI)
AU: Levelt, P F
EM: levelt@knmi.nl
AF: KNMI, PO Box 201, 3730 AE, De Bilt Netherlands
AU: Oord, G H
AF: KNMI, PO Box 201, 3730 AE, De Bilt Netherlands
AU: * Hilsenrath, E
EM: Ernest.Hilsenrath@nasa.gov
AF: NASA-GSFC, Mail code 916, Greenbelt, MD 20771 United States
AU: Bhartia, P K
AF: NASA-GSFC, Mail code 916, Greenbelt, MD 20771 United States
AU: Leppelmeier, G W
EM: Gilbert.Leppelmeier@fmi.fi
AF: FMI, PO Box 503, FIN-00101, Helsinki Finland
AU: Malkki, A
AF: FMI, PO Box 503, FIN-00101, Helsinki Finland
AB: The Ozone Monitoring Instrument (OMI) will fly on NASA's EOS-AURA satellite, scheduled for launch in early 2004. OMI is a UV/VIS, nadir viewing spectrometer that will provide near global coverage of solar backscatter radiances in one day using a wide field telescope. OMI has several technological advances, but has heritage from the TOMS, SBUV, GOME, GOMOS and SCIAMACHY. Using the wavelength range 270 to 500 nm with a 0.5 nm resolution, OMI will measure several key parameters for stratospheric and tropospheric chemistry and for climate research, including O$_{3}$, NO$_{2}$, SO$_{2}$, OClO, HCHO, BrO, UVB, aerosols, and cloud heights and fraction. Combining OMI data with the other Aura instruments will allow derivation of tropospheric gases important for air quality studies. OMI's high spatial resolution (13 x 24 km$^{2}$) will allow observation between clouds, thus giving better penetration into the troposphere than any other UV/VIS backscatter instrument flown to date. Science questions addressed by OMI include: {\it $\bullet$ Is the ozone layer recovering?\\ $\bullet$ What are the sources and distribution of aerosols and trace gases that affect global air quality?\\ $\bullet$ What are the roles of tropospheric ozone and aerosols in climate change?\\ $\bullet$ What are the causes of surface UV-B change?} Proven TOMS and DOAS retrieval algorithms for trace gases will be employed as well as new ones, which will take advantage of experience gained by both European and US scientists. OMI ozone data will be of the same quality as TOMS to insure continuity of ozone trends detected to date. Tropospheric ozone will be retrieved using two algorithms developed for TOMS but tailored for OMI and using ozone profiles from all Aura instruments. Measurement of aerosols characteristics will be enhanced using data from the A-Train. Some of these algorithms are presented in the Aura poster session, while all OMI algorithms are available at http://eospso.gsfc.nasa.gov/. Performance of the OMI instrument and its algorithms relative to Aura's science goals will be discussed. Information on possible co-operation in the OMI validation program will be given.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0340 Middle atmosphere--composition and chemistry
DE: 0345 Pollution--urban and regional (0305)
DE: 0365 Troposphere--composition and chemistry
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting