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List of Abstracts 175P-Observations 2.21 ID:4514 10:30The Use of Satellite based GOME and SCIAMACHY data to Study the Tropospheric Ozone amountover the TropicsAnnette Ladstaetter-Weissenmayer, Stefan Boetel, Christian V. Savigny, Mark Weber, Sergji Puzankov, JohnP. BurrowsUniversity of Bremen, GermanyContact: lad@iup.physik.uni-bremen.deThe Global Ozone Monitoring Experiment (GOME) launched in April 1995 is measuring the sunlight backscattered by the surface in nadir viewing mode (240-790 nm) to detect O3, NO2, BrO, OClO, HCHO andSO2. SCIAMACHY (Scanning Imaging Absorption Spectrometer for Atmospheric ChartographY) launchedin March 2002 is measuring sunlight, transmitted, reflected and scattered by the earth atmosphere or surface(240 nm - 2380 nm). SCIAMACHY measurements yield the amounts and distribution of O3, BrO, OClO,ClO, SO2, H2CO, NO2, CO, CO2, CH4, H2O, N2O, p, T, aerosol, radiation, cloud cover and cloud topheight in limb and nadir mode. Over the tropics e.g. biomass burning is extensive. During these burningevents large amounts of aerosols and trace gases like nitrogen oxide NOx, hydrocarbons, formaldehyde(HCHO) and carbon monoxide (CO) are emitted into the troposphere. In photochemical reactionstropospheric O3 is produced. GOME- and SCIAMACHY-data were analysed to observe an increasing ofthis trace gas during the fire event and to compare then these results with the data of a “non-burning-season”to calculate the additional impact.P-Observations 2.22 ID:4213 10:30The Bihar Pollution Pool as observed from MOPITT (version 4 data), CALIPSO and troposphericozone residual dataJayanta Kar 1 , Merritt Deeter 2 , Jack Fishman 3 , Zhaoyan Liu 3 , John Creilson 3 , Ali Omar 3 , CharlesTrepte 3 , David Winker 31 Science Systems and Applications Inc., Hampton, VA, USA2 National Center for Atmospheric Research, Boulder, CO, USA3 NASA Langley Research Center, Hampton, VA, USAContact: jayanta.kar@nasa.govThe Bihar pollution pool covers an extensive region in the eastern parts of the Indo-Gangetic basin and ismost intense during winter. We use recently improved (version 4) retrievals of carbon monoxide (CO) fromthe MOPITT observations along with the aerosol data from the latest version of the CALIPSO lidarinstrument to provide new insight into the vertical structure of this pollution. In addition, the troposphericozone residual products from the TOMS/SBUV and OMI/MLS database are examined to characterize thispollution pool. The feature is seen primarily in the lower troposphere from about November to February withstrong concomitant increase in the CO, aerosol and ozone tropospheric columns. The height resolved aerosoldata from CALIPSO confirm the trapping of the pollution pool at the lowest altitudes. The CALIPSOsubtype data indicate polluted dust to be the dominant aerosol type. In winter the dust is probably of localorigin. The observations suggest that MOPITT can capture this low altitude phenomenon even in winterconditions as indicated by the averaging kernels. The simultaneous observations of the feature in both thetropospheric ozone column products suggest photochemical production of ozone from the enhancedprecursor abundances at low altitudes.iCACGP-IGAC 2010 14 July, 2010