About the Authors

Huw J. Griffiths

hjg@bas.ac.uk

Affiliation British Antarctic Survey, Cambridge, United Kingdom

Rowan J. Whittle

Affiliation British Antarctic Survey, Cambridge, United Kingdom

Stephen J. Roberts

Affiliation British Antarctic Survey, Cambridge, United Kingdom

Mark Belchier

Affiliation British Antarctic Survey, Cambridge, United Kingdom

Katrin Linse

Affiliation British Antarctic Survey, Cambridge, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HJG RJW. Performed the experiments: HJG RJW. Analyzed the data: HJG RJW. Contributed reagents/materials/analysis tools: HJG RJW. Wrote the paper: HJG RJW SJR MB KL.