C-MAPExp: Airborne Remote and In-Situ Sensing of Gradients in CO2 and CH4 to Constrain Surface Emission
Bovensmann, Heinrich1; Gerilowski, Konstantin1; Krings, Thomas1; Krautwurst, Sven1; Buchwitz, Michael1; Burrows, John P.1; Neininger, Bruno2; Oldani, David2; Schneider, Boris2; Lindemann, Carsten3; Ruhtz, Thomas3; Schüttemeyer, Dirk4

The C-MAPExp campaign was established to support the development of the Earth Explorer Opportunity Candidate Mission CarbonSat. The primary mission objective of CarbonSat is the quantification and discrimination of CO2 and CH4 sources and sinks from the local via the regional to the global scale for i) a better understanding of the processes that control the carbon cycle dynamics and ii) an independent estimate of strong local greenhouse gas emissions (fossil fuel, geological CO2 and CH4, etc.). One unique attribute of CarbonSat is its potential to contribute to a better discrimination of natural GHG fluxes (CO2 and CH4) and strong anthropogenic point source emissions for example CO2 emissions from coal-fired power plants, localized industrial complexes, cities, etc. by imaging atmospheric gradients of XCO2 and XCH4. The C-MAPExp campaign was established to supports the demonstration of CarbonSat capabilities by the quantification of gradients in atmospheric CO2 and CH4 from strong local sources e.g. from coal-fired power plants, localized industrial complexes, landfills, etc. and the derivation of CO2 and CH4 emissions from those atmospheric gradient measurements. Within the C-MAPExp campaign executed in August 2012, airborne measurements combining remote sensing (RS) data (similar to CarbonSat) of XCO2 and XCH4 with in-situ measurements of atmospheric CO2 and CH4 concentration as well as wind speed and direction in the boundary layer were performed. The paper will summarise the performed campaign activities and will present initial results about using in-situ and remote sensing data of CO2 and CH4 to determine emission strength of strong point sources.