[1] Macaulay Land Use Res Inst, Aberdeen AB15 8QH, Scotland
[2] Univ Lancaster, Ctr Sustainable Water Management, Lancaster, England
[3] Univ British Columbia, Vancouver, BC V5Z 1M9, Canada
[4] Univ Leeds, Sch Geog, Leeds LS2 9JT, W Yorkshire, England
[5] Stockholm Univ, Dept Phys Geog & Quaternary Geol, S-10691 Stockholm, Sweden
[6] Newcastle Univ, Newcastle Upon Tyne, Tyne & Wear, England
[7] Univ Bayreuth, Bayreuth, Germany
[8] Univ Aberdeen, Sch Geosci, Aberdeen, Scotland
[9] Univ Freiburg, Freiburg, Germany