1. Centre for Ecology and Hydrology; Crowmarsh Gifford, Wallingford; Oxon; OX10 8BB; UK
2. Centre for Ecology and Hydrology; Bangor University, Environment Centre Wales; Deiniol Road; Bangor; Gwynedd; LL57 2UW; UK
3. Centre for Ecology and Hydrology; Lancaster Environment Centre; Library Avenue, Bailrigg; Lancaster; LA1 4AP; UK
4. Envirodata-Eryri; Snowdonia; Wales; UK