Hannover 2010 – wissenschaftliches Programm
UP 2.3: Poster
Dienstag, 9. März 2010, 16:30–18:30, Lichthof
Retrieval of Aerosol Profiles using Multi Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) — •S. Yilmaz1, U. Frieß1, A. Apituley2, G. de Leeuw3,4,5, B. Henzing5, H. Baars6, B. Heese6, D. Althausen6, A. Dell’Acqua7, M. Adam7, J.-P. Putaud7, and U. Platt1 — 1IUP, University of Heidelberg, Germany — 2RIVM, Bilthoven, The Netherlands — 3FMI, Helsinki, Finland — 4Department of Physics, University of Helsinki, Finland — 5TNO, Utrecht, The Netherlands — 6IFT, Leipzig, Germany — 7JRC-IES, Ispra, Italy
Combining MAX-DOAS measurements of the oxygen-dimer O4 with inverse modelling methods, it is possible to retrieve information on atmospheric aerosols. In 2008 and 2009 several intercomparison campaigns with established aerosol measurement techniques took place in Cabauw, Melpitz, Ispra and Leipzig, where simultaneous DOAS, lidar and Sun photometer measurements were performed. Here we present results of the intercomparisons for cloud free conditions. The correlation of the aerosol optical thickness retrieved by the DOAS technique and the Sun photometer shows coefficients of determination from 0.96 to 0.98 and slopes from 0.94 to 1.07. The vertical structure of the DOAS retrieved aerosol extinction profiles compare favourably with the structures seen by the backscatter lidar. However, the vertical development of the boundary layer is reproduced with a smaller resolution by the DOAS technique. Strategies for the near real-time retrieval of trace gas profiles, aerosol profiles and optical properties will be discussed as well.