Heidelberg 2006 – scientific programme

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UP: Umweltphysik

UP 15: Poster: Atmosph
äre und Klima

UP 15.5: Poster

Tuesday, March 14, 2006, 14:00–16:00, C

Ground-based solar absorption measurements of CO - satellite validation and model comparison — •Voltaire Velazco¹, Justus Notholt¹, Thorsten Warneke¹, and Otto Schrems² — ¹Institut für Umweltphysik, Universitaet Bremen — ²Alfred Wegener Institut, Bremerhaven

Ground-based solar absorption measurements using Fourier transform infrared (FTIR) spectrometers provide precise information about the concentration profiles of many atmospheric trace gases. Therefore these measurements play a vital role for the validation of current and future satellite instruments measuring atmospheric trace gases. Carbon Monoxide (CO) volume mixing ratio (VMR) profiles retrieved from ship borne solar absorption measurements recorded on the Atlantic have been compared with space borne measurements by the Measurements of Pollution in the Troposphere (MOPITT) instrument. The higher vertical resolution of the ground-based measurements allows to detect enhancements in the upper troposphere, which are not seen by MOPITT. The contributions of different sources such as biomass burning, fossil fuel combustion and oxidation of methane (CH4) and non-methane hydrocarbons (NMHC) have been quantified.