Regensburg 2007 – scientific programme

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UP: Fachverband Umweltphysik

UP 8: Poster: Atmosphäre und Aerosole: Datenauswertung und Modellierung

UP 8.6: Poster

Tuesday, March 27, 2007, 14:00–15:00, Poster C

MAX-DOAS measurements of tropospheric NO₂ from the DANDELIONS-II campaign — •Anja Schönhardt¹, Folkard Wittrock¹, Andreas Richter¹, Hilke Oetjen¹, John Philipp Burrows¹, Michel Van Roozendael², Gaia Pinardi², Hans Bergwerff³, Stijn Berkhout³, Rene van der Hoff³, Hester Volten³, Daan Swart³, and Ellen Brinksma⁴ — ¹Institut für Umweltphysik, Universität Bremen, Otto-Hahn-Allee 1, 28359 Bremen — ²BIRA, Pole Espace, Avenue Circulaire 3, B-1180 Bruxelles — ³RIVM, PO. Box 1, NL-3720 BA Bilthoven — ⁴KNMI, P.O. Box 201, NL-3730 AE De Bilt

Dandelions-II, the second iteration of the ”Dutch Aerosol and Nitrogen Dioxide Experiments for vaLIdation of OMI and SCIAMACHY” took place in September 2006 at the Cabauw experimental site in the Netherlands (52^∘N, 4.9^∘E). The objective of this campaign is the validation of satellite instruments and the intercomparison between ground-based measurements of NO₂, O₃ and aerosols. Here, the results of two Bremen MAX-DOAS (multi-axis differential optical absorption spectroscopy) instruments, measuring in the UV and visible spectral regions, for tropospheric NO₂ will be presented. From these measurements, the tropospheric NO₂ profiles could be derived using the different viewing geometries, the retrieved O₄ column and radiative transfer calculations. The results of this profile retrieval are compared to data from two NO₂ in-situ monitors measuring at ground level and 200 m altitude during the campaign. Further comparisons with other DOAS measurements, NO₂ lidar and satellite data are also shown.