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UP: Fachverband Umweltphysik

UP 4: Postersession

UP 4.8: Poster

Tuesday, February 26, 2013, 17:15–18:30, Poster EG

Limb and Nadir detection of UV/vis/near IR absorbing trace gases from the novel research aircraft HALO around the tropopause and in the troposphere. — •Tilman Hüneke¹, Eric Gentry², Mareike Kenntner¹, Sabrina Ludmann¹, Rasmus Raecke¹, and Klaus Pfeilsticker¹ — ¹Institut für Umweltphysik, Universität Heidelberg, Heidelberg, Germany — ²Massachusetts Institute of Technology, Cambridge, USA

A novel 6-channel mini-DOAS optical spectrometer has been deployed on the novel HALO research aircraft. It is aiming at high sensitive measurements of profiles of O3, NO2, CH2O, C2H2O2, BrO, OClO, IO, gaseous, liquid and solid H2O around flight altitude. The Nadir observation also allows to measure the total tropospheric column of these gases. Upon the retrieval of slant column amounts of the targeted gases, the data reduction involves forward radiative transfer modelling of the observations and standard mathematical inversion technique. For the first time, the novel spectrometer has been deployed on the HALO research aircraft during TACTS (Transport And Composition in the UT/LMS) and ESMVal (Earth System Model Validation) measurement campaigns which took place in summer 2012. The present contribution reports on technical features of the novel instrument, the feasibility of the method together with some first sample results for major absorbers.