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List of Abstracts 97P-Observations 1.22 ID:4389 15:35Tropospheric Formaldehyde observations derived from satellite measurements.Thierry Marbach, Steffen Beirle, Marloes Penning De Vries, Cheng Liu, Thomas WagnerMPI for ChemistryContact: thierry.marbach@mpic.deThe launch of GOME-1 onboard ERS-2 in 1995 was the beginning of a long term satellite observations,completed with SCIAMACHY in 2002 (onboard ENVISAT) and GOME-2 in 2006 (onboard METOP-A)This provides the opportunity to get information about sources, sinks and trends over specific regions forvarious trace gases, and especially for Formaldehyde (HCHO) presented in this paper:The biogenic sources of HCHO are in many cases the strongest HCHO sources (e.g. over evergreen forest).The biomass burning source typically shows pronounced seasonal patterns or is even of sporadic nature. Weinvestigated the time series of monthly mean values for selected regions of the world. Besides the satellitemeasurements of HCHO, the fire counts (from ATSR) and temperature are taken as proxy for biomassburning events and vegetation activity, respectively. In addition we plan to compare the satellite observationsof HCHO also to other trace gases measured from satellite instruments (e.g CO and NO 2 as proxy forbiomass burning) as well as the comparison with aerosols scattering index.Anthropogenic HCHO emissions are shown with a case study linked to shipping emission. The line ofenhanced HCHO in the Indian Ocean as seen in the 7-year composite of cloud free GOME-1 observationsclearly coincides with the distinct ship track corridor from Sri Lanka to Indonesia. Comparisons with NO 2values over the shipping route and EMAC model data indicate that direct emissions of HCHO or degradationof emitted NMHC cannot explain the observed enhanced HCHO values. Instead increased CH 4 degradationdue to enhanced OH concentrations related to the ship emissions are the most probable reason.P-Observations 1.23 ID:4111 15:35Seven years’ observation of mid-upper tropospheric CH4 from AIRSXiaozhen Xiong 1 , Chris Barnet 2 , Eric Maddy 31 Dell Perot System & NOAA/NESIDS/STAR2 NOAA/NESIDS/STAR3 Dell Perot System & NOAA/NESIDS/STARContact: xiaozhen.xiong@noaa.govThe global distribution of mid-upper tropospheric methane (CH4) has been derived using the space-borneobservations by the Atmospheric Infrared Sounder (AIRS) on the EOS/Aqua platform and the IASI on theMETOP-1at NOAA/NESDIS/STAR. The products of CH4 for 7 years from AIRS and more than one yearfrom IASI in a 3 degree *3 degree grid are available upon request. Validation of these algorithms versusmore than one thousand aircraft profiles demonstrates that the rms errors are less than 1.5%. Here we willpresent the validation of the retrieved CH4 from AIRS and IASI, comparison of CH4 retrievals from AIRSand IASI, and some finding about the spatiotemporal variation of CH4 based on 7 years' observation fromAIRS and its comparison with model simulations, which include (1) some special feathers of the seasonalcycles of CH4 in the high northern hemisphere; (2) CH4 plume over the South Asia associated with theemission from rice paddies. Recent trend of CH4 as viewed from space and its difference from ground-basedmeasurements will be discussed.iCACGP-IGAC 2010 12 July, 2010