HR: 0830h
AN: A21C-0981    [PDF]
TI: Global Retrieval of BrO, HCHO, and OClO for the \mbox{EOS--Aura} Ozone Monitoring Instrument
AU: * Kurosu, T P
EM: tkurosu@cfa.harvard.edu
AF: Harvard-Smithsonian Center for Astrophysics, 60 Garden Street (MS 50), Cambridge, MA 02138 United States
AU: Chance, K
EM: kchance@cfa.harvard.edu
AF: Harvard-Smithsonian Center for Astrophysics, 60 Garden Street (MS 50), Cambridge, MA 02138 United States
AB: The Ozone Monitoring Instrument (OMI) is scheduled for launch on the EOS--Aura platform in March 2004. OMI is a nadir viewing UV/Vis instrument observing continuously from 270 to 500 nm, and thus similar to the European Space Agency's Global Ozone Monitoring Experiment (GOME), from which it derives much of its heritage. Compared to GOME, OMI has about 3--5 times coarser spectral resolution but a more than 40 times smaller ground footprint of 13$\times$24 km$^{2}$, and it achieves global coverage within one day. Stratospheric bromine oxide (BrO) and chlorine dioxide (OClO) are key elements in the destruction of stratospheric ozone and the formation of the Antarctic ozone hole; in the troposphere, BrO is released from the snow and ice-pack during high-latitude Spring. Tropospheric formaldehyde (HCHO), a volatile organic compound (VOC), is an indicator of isoprene emissions and a byproduct of forest fires; it is a key measure for air quality determination from space. We present results from the operational algorithms for BrO, HCHO, and OClO, as well as auxiliary retrievals of ozone, which we are currently developing for OMI. Global retrievals of BrO and HCHO, and OClO within the polar vortex, have been performed by applying the OMI algorithms to existing GOME data. The trace gas algorithms developed for OMI are scientifically mature since they are able to fully exploit their heritage from GOME. Key elements in the retrieval are the non-linear least squares minimization procedure to derive trace gas slant columns and the conversion from slant to vertical columns using cloud information and a shape factor analysis. This poster demonstrates the capabilities of atmospheric chemistry monitoring with the OMI instrument.
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