Seasonal Simulation of Weather Extremes

Thomas Schwitalla (), Volker Wulfmeyer () and Kirsten Warrach-Sagi ()
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Thomas Schwitalla: University of Hohenheim, Institute of Physics and Meteorology
Volker Wulfmeyer: University of Hohenheim, Institute of Physics and Meteorology
Kirsten Warrach-Sagi: University of Hohenheim, Institute of Physics and Meteorology

A chapter in High Performance Computing in Science and Engineering ' 17, 2018, pp 441-451 from Springer

Abstract: Abstract To date, seasonal forecasts are often performed by applying horizontal resolutions of 75–150 km due to lack of computational resources and associated operational constraints. As this resolution is too coarse to represent fine scale structures impacting the large scale circulation, a convection permitting (CP) resolution of less than 4 km horizontal resolution is required. Most of the simulations are carried out as limited area model (LAMs) and thus require boundary conditions at all four domain boundaries. In this study, the Weather Research and Forecasting (WRF) model is applied in a latitude belt set-up in order to avoid the application of zonal boundaries. The horizontal resolution is 0.03∘ spanning a belt between 65∘ N and 57∘ S encompassing 12000 ∗ 4060 ∗ 57 grid boxes. The simulation is forced by ECMWF analysis data and high resolution SST data from multiple sources. The simulation period is February to beginning of July 2015 which is a strong El Niño period.

Date: 2018
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DOI: 10.1007/978-3-319-68394-2_26

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