high resolution modelling of wind fields for optimization of empirical storm flood predictions
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2014
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Abstract
High resolution wind fields are necessary to predict the occurrence of storm
flood events and their magnitude. Deutscher Wetterdienst (DWD) created a
catalogue of detailed wind fields of 39 historical storms at the German North
Sea coast from the years 1962 to 2011. The catalogue is used by the
Niedersächsisches Landesamt für Wasser-, Küsten- und Naturschutz
(NLWKN) coastal research center to improve their flood alert service.
The computation of wind fields and other meteorological parameters is based on the model chain of the DWD going from the global model GME via the limited-area model COSMO with 7 km mesh size down to a COSMO model with 2.2 km. To obtain an improved analysis COSMO runs are nudged against observations for the historical storms. The global model GME is initialised from the ERA reanalysis data of the European Centre for Medium-Range Weather Forecasts (ECMWF).
As expected, we got better congruency with observations of the model for the nudging runs than the normal forecast runs for most storms. We also found during the verification process that different land use data sets could influence the results considerably.
The computation of wind fields and other meteorological parameters is based on the model chain of the DWD going from the global model GME via the limited-area model COSMO with 7 km mesh size down to a COSMO model with 2.2 km. To obtain an improved analysis COSMO runs are nudged against observations for the historical storms. The global model GME is initialised from the ERA reanalysis data of the European Centre for Medium-Range Weather Forecasts (ECMWF).
As expected, we got better congruency with observations of the model for the nudging runs than the normal forecast runs for most storms. We also found during the verification process that different land use data sets could influence the results considerably.
| Reference Key |
brecht2014advanceshigh
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|---|---|
| Authors | ;B. Brecht;H. Frank |
| Journal | proceedings of the 2017 ieee russia section young researchers in electrical and electronic engineering conference, elconrus 2017 |
| Year | 2014 |
| DOI |
10.5194/asr-11-1-2014
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| URL | |
| Keywords |
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