1. Centre for Ecology and Hydrology, Winfrith Technology Centre, Dorchester, Dorset, DT2 8ZD, U.K., Centre for Ecology and Hydrology, Merlewood Research Station, Grange-over-Sands, Cumbria, LA11 6JU, U.K., School of Earth, Environmental and Physical Sciences, University of Portsmouth, Burnaby Building, Burnaby Road, Portsmouth, PO1 3QL, U.K., ENEA, CP2400, 0100 Rome, Italy, Institute of Geological Sciences of the Academy of Sciences of Belarus, Zhodinskaya Strasse 7, Minsk 220141, Belarus, STUK-Radiation...