1. Environmental Change Research Centre Department of Geography University College London WC1E 6BT UK
2. Climate and Environmental Physics Physics Institute University of Bern Bern 3012 Switzerland
3. Climate and Environmental PhysicsPhysics Institute and Oeschger Centre for Climate Change Research University of Bern Bern 3012 Switzerland
4. Palaeoenvironmental Research Unit School of Geography, Archaeology and Irish Studies National University of Ireland Galway Galway H91 TK33 Ireland