HR: 0830h
AN: A21C-0977    [PDF]
TI: EOS-Aura's Ozone Monitoring Instrument (OMI) Validation
AU: * Brinksma, E J
EM: brinksma@knmi.nl
AF: Royal Netherlands Meteorological Institute (KNMI), PO Box 201, De Bilt, 3730 AE Netherlands
AU: Kroon, M
EM: mark.kroon@knmi.nl
AF: Royal Netherlands Meteorological Institute (KNMI), PO Box 201, De Bilt, 3730 AE Netherlands
AU: McPeters, R D
EM: richard.d.mcpeters@nasa.gov
AF: NASA Goddard Space Flight Centre, Mail Code 916, Greenbelt, MD 20771 United States
AU: Levelt, P F
EM: levelt@knmi.nl
AF: Royal Netherlands Meteorological Institute (KNMI), PO Box 201, De Bilt, 3730 AE Netherlands
AB: OMI is a nadir-pointing imaging spectrometer that will measure Earth reflectance and solar irradiance in the 270-500~nm spectral range with a unique spatial resolution of 13 $\times$ 24 km (nadir). OMI will fly on EOS-Aura, which is launched in 2004 into a 1:38 PM near-polar ascending orbit. OMI will contribute to the EOS-Aura mission objectives for climate monitoring and atmospheric research by measuring columns of O~$_3$, NO$_2$, HCHO, BrO, OClO, and volcanic SO$_2$, O$_3$ profiles, aerosol optical depth and single scattering albedo, surface UV irradiance, cloud fraction and cloud pressure. These products are retrieved with daily global coverage. The most important objective of OMI is to provide the continuation of the TOMS and GOME total ozone data record. \\ \\ Four major environmental questions will be addressed by the OMI measurements: \\ 1. Is the ozone layer recovering as expected?\\ 2. What are the sources of aerosols and trace gases that affect global air quality and how are they transported?\\ 3. What are the roles of tropospheric ozone and aerosols in climate change?\\ 4. What are the causes of surface UV-B change?\\ \\ Extensive validation of OMI is foreseen, based in part on routine ground-based data. However, in view of the high spatial resolution of OMI in combination with the broad spectral range covered and the major environmental questions posed, additional measurements are needed. Existing routine measurements predominantly take place in pristine areas. Therefore, strong needs for additional ground-based and airborne measurements exist (see environmental questions 2 and 3). Examples are measurements of tropospheric ozone and NO$_2$ profiles, to verify the assumptions made in calculating airmass factors for the respective DOAS retrievals, and measurements of aerosol optical properties and scattering behavior in the 340-500 nm spectral range. \\ \\ We invite the scientific community to submit proposals for validation projects in response to two upcoming simultaneous calls (winter 2003/2004):\\ 1. NASA National Research Announcement for Aura validation (NRA-Aura)\\ 2. International Announcement of Opportunity for OMI validation (AO-OMI)\\ In the NRA-Aura, US scientists can apply for funding to contribute to Aura validation. The AO-OMI invites the world-wide scientific community (Europe specifically) to participate in the validation of OMI data. Early Aura or OMI data access will be provided to investigators contributing to Aura or OMI validation, respectively. Contacts are Anne Douglass (NRA-Aura: Anne.R.Douglass@nasa.gov) and Mark Kroon (AO-OMI: Mark.Kroon@knmi.nl).
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
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