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https://doi.org/10.5194/egusphere-2022-288
https://doi.org/10.5194/egusphere-2022-288
16 May 2022
 | 16 May 2022

Skillful Decadal Prediction of German Bight Storm Activity

Daniel Krieger, Sebastian Brune, Patrick Pieper, Ralf Weisse, and Johanna Baehr

Abstract. We evaluate the prediction skill of the Max-Planck-Institute Earth System Model (MPI-ESM) decadal hindcast system for German Bight storm activity (GBSA) on a multiannual to decadal scale. We define GBSA every year via the most extreme three-hourly geostrophic wind speeds, which are derived from mean sea-level pressure (MSLP) data. Our 64-member ensemble of annually initialized hindcast simulations spans the time period 1960-2018. For this period, we compare deterministically and probabilistically predicted winter MSLP anomalies and annual GBSA with a lead time of up to ten years against observations. The model shows limited deterministic skill for single prediction years, but significant positive deterministic skill for long averaging periods. For probabilistic predictions of high and low storm activity, the model is skillful at both short and long averaging periods, and outperforms persistence-based predictions. For short lead years, the skill of the probabilistic prediction for high and low storm activity notably exceeds the deterministic skill. We therefore conclude that, for the German Bight, skillful decadal predictions of regional storm activity can be viable with a large ensemble and a carefully designed approach.

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Journal article(s) based on this preprint

14 Dec 2022
Skillful decadal prediction of German Bight storm activity
Daniel Krieger, Sebastian Brune, Patrick Pieper, Ralf Weisse, and Johanna Baehr
Nat. Hazards Earth Syst. Sci., 22, 3993–4009, https://doi.org/10.5194/nhess-22-3993-2022,https://doi.org/10.5194/nhess-22-3993-2022, 2022
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The requested preprint has a corresponding peer-reviewed final revised paper. You are encouraged to refer to the final revised version.

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Accurate predictions of storm activity are desirable for coastal management. We investigate how...
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