1. Centre for Polar Observation and Modelling, School of Earth and Environment University of Leeds Leeds UK
2. Mullard Space Science Laboratory, Department of Space & Climate Physics University College London London UK
3. Centre for Polar Observation and Modelling, Department of Earth Sciences University College London London UK
4. Now at Deutscher Wetterdienst Offenbach Germany
5. Now at Centre for Polar Observation & Modelling, Centre of Excellence in Environmental Data Science Lancaster University Lancaster UK
6. ESA‐ESRIN, Via Galileo Galilei Frascati Italy