1. Department of Mathematics and Statistics University of Reading Reading UK
2. Institute for Mathematics University of Potsdam Potsdam Germany
3. European Centre for Medium‐Range Weather Forecasts (ECMWF) Reading UK
4. National Centre for Atmospheric Science (NCAS), Department of Atmospheric, Oceanic and Planetary Physics (AOPP) University of Oxford Oxford UK
5. Department of Meteorology University of Reading Reading UK