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List of Abstracts 98P-Observations 1.24 ID:4549 15:35Consistent Global Long Term (1995-2010) Water Vapor Observations From UV/vis Satellite SensorsThomas Wagner 1 , Steffen Beirle 1 , Sander Slijkhuis 2 , Niilo Kalakoski 3 , Diego Loyola 2 , Kornelia Mies 11 MPI for Chemistry2 DLR Oberpfaffenhofen3 FMI HelsinkiContact: thomas.wagner@mpic.deFrom UV/vis satellite instruments like GOME-1, SCIAMACHY and GOME-2 it is possible to retrieve thetotal column precipitable water over both oceans and continents with similar sensitivity. The water vaporanalysis is performed with consistent algorithms (similar wavelength ranges and same sets of referencespectra) for all three sensors. Nevertheless, still differences between the three sensors exist includingdifferent spatial resolution, different overpass time and different spectral resolution. We investigate andquantify the potential effects of these differences both using simulation studies and experimental data duringthe overlap periods between the different sensors. As a result we derive a consistent data set ranging from1995 to 2010, which will be part of the ESA project GlobVapour and will be the official EUMETSAT O3M-SAF product (GOME-2). We also present validation results using SSM/I observations over oceans and radiosonde observations over continents. The combined observations of the three satellite instruments constitute aunique data set, covering not only a strong ENSO event (1997/98) but also a time span of strong temperatureincrease due to climate change. We determine temporal trends (and their spatial distribution) of total columnprecipitable water over this period of time.P-Observations 1.25 ID:4308 15:35Global distribution and transport of CO2 in upper troposphere and lower stratosphere obtained bycommercial aircraft observationsYousuke Sawa 1 , Toshinobu Machida 2 , Hidekazu Matsueda 11 Meteorological Research Institute2 National Institute for Environmental StudiesContact: ysawa@mri-jma.go.jpWe analyzed CO2 distributions in the upper troposphere and the lower stratosphere obtained byComprehensive Observation Network for TRace gases by AirLIner (CONTRAIL). More than 2 million insituCO2 data from more than 3000 flights between Japan and Europe, North America, Australia, or Asiawere collected during the period from November 2005 to November 2009. Observed mixing ratios wereintegrated in equivalent latitude and potential temperature grid for a reference year of 2008 to plotclimatological distributions of CO2. In the mid-, high latitudinal regions between Japan and Europe or NorthAmerica, seasonal cycles with summer maximum and spring minimum were observed in lower stratosphere.Tropospheric CO2 in these latitudinal bands showed strong seasonal cycles with springtime maximums andrelatively sharp minimums in summer. Longitudinal differences of CO2 mixing ratios in the uppertroposphere and lower stratosphere in the mid-, high latitude were relatively small but significant differenceswere found in July in the upper troposphere; lower CO2 over the southern Eurasian continent and highermixing ratios over the Northern Pacific. This land-sea difference was gradually reduced after August,suggesting the transport of low CO2 originated from terrestrial sinks to oceanic regions. CO2 cross sectionsby using the flights between Japan and Australia or Southeast Asia show spread of high mixing rations fromthe Northern Hemisphere to the Southern Hemisphere from April to June in the upper troposphere. Thistransport brings a unique seasonal peak in autumn in the Southern Hemisphere.iCACGP-IGAC 2010 12 July, 2010