1. Department of Geological Sciences and Bolin Centre for Climate ResearchStockholm University Stockholm Sweden
2. School of Natural and Environmental SciencesNewcastle University Newcastle upon Tyne UK
3. Centre for Ocean and Atmospheric Sciences, School of MathematicsUniversity of East Anglia Norwich UK
4. Department of Meteorology and Bolin Centre for Climate ResearchStockholm University Stockholm Sweden
5. Department of Physical Geography and Bolin Centre for Climate ResearchStockholm University Stockholm Sweden
6. British Antarctic Survey Cambridge UK
7. School of Mathematics, Statistics and PhysicsNewcastle University Newcastle upon Tyne UK