Jena 2013 – wissenschaftliches Programm
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UP: Fachverband Umweltphysik
UP 4: Postersession
UP 4.18: Poster
Dienstag, 26. Februar 2013, 17:15–18:30, Poster EG
Comparison of middle and near infrared total column xCO2 retrieval — •Matthias Buschmann1, Nicholas Deutscher1,3, Susanne Dohe2, Vanessa Sherlock4, David Griffith3, and Justus Notholt1 — 1Institute of Environmental Physics, University of Bremen, Bremen, Germany — 2Institute for Meteorology and Climate Research (IMK-ASF), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany — 3School of Chemistry, University of Wollongong, Wollongong, Australia — 4National Institute of Water and Atmospheric Research (NIWA), Wellington, New Zealand
Monitoring networks like the NDACC (Network for the Detection of Atmospheric Composition Change) and TCCON (Total Carbon Column Observing Network) continuously monitor a variety of trace gases in the atmosphere by employing ground based Fourier Transform InfraRed (FTIR) spectroscopy on solar radiation. TCCON uses near infrared (NIR) spectral windows to retrieve total column CO2, which yield a high enough precision (<0.2%) to use as validation for satellite retrievals and model data. On the other hand, it has been considered difficult to obtain results with comparable precision from the middle infrared (MIR) from NDACC spectra. It would, however, be useful to be able to use the longer time series of the NDACC stations. Here we present an intercomparison study using different monitoring stations, that routinely take both NIR and MIR spectra. This results in a validation scheme for a MIR time series based on the already well validated TCCON data.