Articles | Volume 12, issue 1
https://doi.org/10.5194/gmd-12-261-2019
https://doi.org/10.5194/gmd-12-261-2019
Development and technical paper
 | 
16 Jan 2019
Development and technical paper |  | 16 Jan 2019

Independent perturbations for physics parametrization tendencies in a convection-permitting ensemble (pSPPT)

Clemens Wastl, Yong Wang, Aitor Atencia, and Christoph Wittmann

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Latest update: 23 Mar 2023
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Short summary
Ensemble forecasting at the convection-permitting scale (< 3 km) requires new methodologies in representing model uncertainties. In this paper a new stochastic scheme is proposed and tested in the complex terrain of the Alps. In this scheme the tendencies of the physical parametrizations are perturbed separately, which sustains a physically consistent relationship between the processes. This scheme increases the stability of the model and leads to improvements in the probabilistic performance.