Measurements of Tropospheric BrO, HCHO, and Glyoxal from the Ozone Monitoring Instrument on EOS Aura
Thomas P. Kurosu(1), Kelly Chance(1), Simon Carn(2) and Rainer M. Volkamer(3)
(1) Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, United States
(2) University of Maryland Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, United States
(3) University of California at San Diego, 9500 Gilman Drive, La Jolla, CA 92093, United States
Little more than one year after First Light, data products of minor trace species from the Ozone Monitoring Instrument are showing great potential for atmospheric chemistry studies: BrO, an important compound in stratospheric ozone depletion due to its high efficiency in destroying ozone molecules, has been observed by OMI in the troposphere over shelf ice, and recently over salt lakes and in volcanic plumes. Recent improvements in the retrieval of HCHO, the major proxy for volatile organic compound (VOC) emissions, produced from methane oxidation and isoprene emissions, and an indicator for urban air quality, has significantly enhanced the quality of this data product and has brought into reach its utilization in air quality studies. Finally, the observation of CHO-CHO (glyoxal), a VOC recently detected in ground-based measurements over Mexico City, constitutes the first-ever measurement of this elusive indicator of air quality from a satellite instrument. With ground pixel sizes of 13x24 km^2 at nadir and daily global coverage, OMI provides a unique data set for global tropospheric chemistry monitoring.
We present recent advances on the detection of tropospheric BrO released from Salt Lakes and in volcanic plumes, will give first satellite-based estimates of BrO-to-SO2, and will present updates on the retrievals of HCHO and CHO-CHO. The retrieval algorithm will be introduced briefly, and an overview of the status and availability of OMI data products both, operational (BrO, HCHO, OClO) and scientific (CHO-CHO), derived at the SAO will be given. Where available, results from OMI will be compared against to SCIAMACHY.
Keywords: ESA European
Space Agency - Agence spatiale europeenne,
observation de la terre, earth observation,
satellite remote sensing,
teledetection, geophysique, altimetrie, radar,
chimique atmospherique, geophysics, altimetry, radar,