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- W2053283713 abstract "The quantitative forecast of precipitation requires a probabilistic background particularly with regard to forecast lead times of more than 3 days. As only ensemble simulations can provide useful information of the underlying probability density function, we built a new ensemble forecasting system (GME-EFS) based on the GMEmodel of the GermanMeteorological Service (DWD). For the generation of appropriate initial ensemble perturbations we chose the breeding technique developed by TOTH and KALNAY (1993, 1997), which develops perturbations by estimating the regions of largest model error induced uncertainty. This method is applied and tested in the framework of quasi-operational forecasts for a three month period in 2007. The performance of the resulting ensemble forecasts are compared to the operational ensemble prediction systems ECMWF EPS and NCEP GFS by means of ensemble spread of free atmosphere parameters (geopotential and temperature) and ensemble skill of precipitation forecasting. This comparison indicates that the GME ensemble forecasting system (GME-EFS) provides reasonable forecasts with spread skill score comparable to that of the NCEP GFS. An analysis with the continuous ranked probability score exhibits a lack of resolution for the GME forecasts compared to the operational ensembles. However, with significant enhancements during the 3 month test period, the first results of our work with the GME-EFS indicate possibilities for further development as well as the potential for later operational usage." @default.
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- W2053283713 date "2008-12-09" @default.
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- W2053283713 title "Towards a GME ensemble forecasting system: Ensemble initialization using the breeding technique" @default.
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- W2053283713 doi "https://doi.org/10.1127/0941-2948/2008/0333" @default.
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