1. School of Earth and Environmental Sciences The University of Manchester Michael Smith Building Manchester M13 9PT UK
2. UMR 1391 Interaction Sol‐Plante‐Atmosphere INRA Centre Bordeaux‐Aquitaine CS20032, 71 Avenue Edouard Bourlaux Villenave d'Ornon Cedex 33882 France
3. Centre of Ecology and Hydrology Maclean Building, Benson Lane, Crowmarsh Gifford Wallingford OX10 8BB UK