Newcastle University, Water Resource Systems Research Laboratory, School of Civil Engineering and Geosciences, Cassie Building, Newcastle upon Tyne, NE1 7RU, United Kingdom
National Center for Atmospheric Research, Geophysical Statistics Project, Institute for Mathematics Applied to Geosciences, P.O. Box 3000, Boulder, CO 80307-3000, United States
Oxford University, Department of Physics, Atmospheric Oceanic & Planetary Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, United Kingdom
Oxford University, School of Geography, Oxford University Centre for the Environment, University of Oxford, South Parks Road, Oxford, OX1 3QY, United Kingdom