Dr. Martin J. Fengler (Meteomatics AG, St. Gallen, Switzerland und Berlin, Germany) ist verhindert und wird ersetzt durch
Dr. Thomas Klötzke (Meteomatics AG, St. Gallen, Switzerland und Berlin, Germany)
The Planetary Boundary Layer (PBL), which is the lowest part of the atmosphere, is the main trigger of phenomena like fog, low stratus, freezing rain and thunderstorms. A major reason for the short-term forecasts (up to 24h lead time) to not achieve better prediction skills for above phenomena is the data gap in the PBL. Data observed on the ground and the very sparse radio sonde soundings are not able to describe the dynamics of the lower atmosphere well enough for the numerical weather models to predict the further development.
Since 2012, Meteomatics has been developing rotary wing unmanned aerial vehicles (UAVs), referred to as Meteodrones, which are designed to profiling the lower atmosphere to fill that data gap. By now more than 20’000 profiles from ground to maximum altitudes between 500 and 6’000 meters above ground were conducted.
After a successful pilot project at Zurich airport, where Meteodrones were profiling the lower atmosphere continuously for two weeks, Meteomatics is about to deploy 15 Meteobases across Switzerland in line with a project funded by the Bundesamt für Zivilluftfahrt (BAZL). The Meteobases allow automated flight operations using Meteodrones.
Measured data profiles from this campaign will operationally ingested into Meteomatics‘ in-house Weather Research & Forecasting (WRF) numerical weather model SWISS1k. The models are run with and without Meteodrone profile data being assimilated to evaluate the influence of the additional data on the forecast skills, focusing on fog and cloud development.
Calculated results from previous measurement campaigns show that the assimilated Meteodrone profiles had a positive or strongly positive impact on the fog or cloud analysis and consequently on derived parameters as visibility or icing potential. The latter being economically relevant particularly for aerodrome operations.