Funding for this research was provided by:
Institut Polaire Français Paul Emile Victor (Programmes 137)
Text and Data Mining valid from 2020-01-30
Received: 4 November 2019
Accepted: 23 January 2020
First Online: 30 January 2020
: The study was approved by the French Polar Environmental Committee (permit number 2015–105; TAAF).
: Not applicable.
: The authors declare that they have no competing interests.