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Towards the comparability of microwave observations: Results from a temporary profiler network during the WMO campaign LUAMI in November 2008

Jürgen Güldner¹, A. Christoph², D. Engelbart², M.E. Ferrario³, C. Heret⁴, U. Löhnert⁵, F. Madonna⁶, D. Ruffieux⁷, Ch.L. Wrench⁸, Y. Zoll⁹

¹German Weather Service (DWD), Richard-Aßmann-Observatory, Lindenberg
²German Weather Service (DWD), Richard Aßmann Observatory, Lindenberg
³Centro Meteorologico di Teolo-ARPA Veneto
⁴Deutscher Wetterdienst(DWD), Richard-Aßmann-Observatorium, Lindenberg
⁵Institut für Geophysik und Meteorologie, Universität zu Köln
⁶C.N.R. - Istituto di Metodologie per l'Analisi Ambientale
⁷Federal Office of Meteorology and Climatology MeteoSwiss
⁸STFC-Rutherford Appleton Laboratory
⁹IFM - GEOMAR

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Abstract
The field campaign LUAMI was organized in November 2008 at the Lindenberg observatory focussed on improvements of radiosounding and on intercomparisons of both, up-to-date active and passive ground-based sensors. Additionally, a temporary network of passive microwave profilers at 8 stations in Europe was established to demonstrate the capabilities of these systems when deployed in operational meteorological networks.
The comparability of observations provided by different instruments operating at different sites is an essential pre-condition for any applications in climatology and numerical weather forecast. Independent data are needed to evaluate the profiler network. In the paper, calculations from the DWD forecast models COSMO-EU as well as GPS-derived Integrated Water Vapour (IWV) data are used to validate measurements from all participating sites. Results of the intercomparisons are presented and examples are shown, how systematic differences can be reduced.