1. Center for Australian Weather and Climate Research; CSIRO Marine and Atmospheric Research; Aspendale Victoria Australia
2. Center for Ice and Climate, Niels Bohr Institute; University of Copenhagen; Copenhagen Denmark
3. Department of Physics and Astronomy; Bowdoin College; Brunswick Maine USA
4. Department of the Environment and Heritage, Australian Antarctic Division, Antarctic Climate and Ecosystem Cooperative Research Center; Hobart Tasmania Australia
5. Department of Geosciences; Princeton University; Princeton New Jersey USA
6. Institute of Arctic and Alpine Research; University of Colorado Boulder; Boulder Colorado USA