David A. Sear, School of Geography University of Southampton Highfield, Southampton, SO17 1BJ United Kingdom
Douglas.J.Booker, Centre for Ecology & Hydrology, Wallingford Maclean Building Crowmarsh Gifford, Wallingford, OX10 8BB United Kingdom
Anthony J.Payne, Centre for Polar Observation & Modelling School of Geographical Sciences University of Bristol University Road, Bristol, BS8 1SS United Kingdom