1. School of Geography, Earth and Environmental Sciences; University of Birmingham; Birmingham B15 2TT UK
2. Department of Geology; The University Centre in Svalbard (UNIS); P.O. Box 156 Longyearbyen Norway
3. Department of Geography and Sustainable Development; University of St Andrews; St Andrews KY16 9AL UK
4. Natural Resource Management; New Mexico Highlands University; Las Vegas NM 87701 USA
5. Centre for Glaciology; Department of Geography and Earth Sciences; Aberystwyth University; Aberystwyth Ceredigion SY23 3DB UK