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UP: Fachverband Umweltphysik
UP 4: Poster: Atmosphäre und Klima
UP 4.6: Poster
Dienstag, 11. März 2008, 16:30–19:00, Poster B1
High precision column measurements of CO2 and CH4 derived from mid IR and near IR FTS at Permanent Ground-Truthing Facility Zugspitze/Garmisch — •Ralf Sussmann, Frank Forster, Tobias Borsdorff, and Markus Rettinger — Research Center Karlsruhe, IMK-IFU, Kreuzeckbahnstr. 19, 82467 Garmisch-Partenkirchen,Germany
The Permanent Ground-Truthing Facility at Garmisch is operating a near IR high-resolution FTS (47.42∘ N, 10.98∘ E, 744m a.s.l) and is part of the global Total Carbon Column Observing Network (TCCON). From these spectra, accurate and precise column-averaged mixing ratios of CO2/O2 and CH4/O2 are retrieved. These observations used to validate measurements of the NASA Orbiting Carbon Observatory (OCO) satellite missions will also provide input data for the inverse modeling of sources and sinks. Due to the high atmospheric background concentration of CO2 and CH4 high requirements are put on the measurement precision, i.e., a single-column-measurement precision of less than 0.1% is required. The Permanent Ground-Truthing at the Zugspitze is operating also a mid IR high-resolution FTS (47.42∘ N, 10.98∘ E, 2964m a.s.l) which is part of the Network for the Detection of Atmospheric Composition Change (NDACC). From these spectra, accurate and precise partial column profiles of CH4 are retrieved. The retrieval from these partial column observations is optimized for validation of satellite measurements from ENVISAT/SCIAMACHY.