1. Department of Meteorology, University of Reading, Whiteknights, Reading, UK
2. The James Hutton Institute, Craigiebuckler, Aberdeen, UK
3. Ecological Sciences, The James Hutton Institute, Craigiebuckler, Aberdeen AB15 8QH, UK
4. Information and Computational Sciences, The James Hutton Institute, Craigiebuckler, Aberdeen AB15 8QH, UK
5. National Centre for Earth Observation, Department of Meteorology, University of Reading, Reading, UK