This article has been co-authored by Juha Saunavaara (Hokkaido University Arctic Research Center), Ritva Kylli (Faculty of Humanities, University of Oulu) and Mirva Salminen (Arctic Centre, University of Lapland).

DOI: https://doi.org/10.1017/S0032247421000036

Further information: juha.saunavaara@arc.hokudai.ac.jp