About the Authors
- Peter T. Fretwell, Norman Ratcliffe, Adrian J. Fox, Andrew H. Fleming, Phil N. Trathan
- British Antarctic Survey, Cambridge, United Kingdom
- Michelle A. LaRue, Paul Morin, Claire Porter
- Polar Geospatial Center, University in Minnesota, Minneapolis, Minnesota, United States of America
- Gerald L. Kooyman
- Scripps Institution of Oceanography, University of California San Diego, La Jolla, California, United States of America
- Barbara Wienecke
- Australian Antarctic Division, Hobart, Tasmania, Australia
The authors have declared that no competing interests exist.
Conceived and designed the experiments: PF NR GK CP AHF. Performed the experiments: PF ML CP. Analyzed the data: PF ML GK AJF. Contributed reagents/materials/analysis tools: PF ML PM CP. Wrote the paper: PF PT GK BW ML PM. Provided data: PM AHF GK BW.