1. Institute of Earth SciencesHeidelberg UniversityHeidelberg Germany
2. Arctic and Antarctic Research InstituteSt. Petersburg Russia
3. Institute of Earth SciencesSt. Petersburg State UniversitySt. Petersburg Russia
4. GEOMAR Helmholtz Center for Ocean Research KielKiel Germany
5. Vernadsky Institute of Geochemistry and Analytical ChemistryMoscow Russia
6. Institute of Volcanology and SeismologyPetropavlovsk‐Kamchatsky Russia
7. Department of GeographySwansea UniversitySwansea United Kingdom
8. Faculty of GeographyLomonosov Moscow State UniversityMoscow Russia