The map can be freely used, provided the credits are mentioned.
Map: Arto Vitikka, Arctic Centre, University of Lapland.
Border data: Runfola, D. et al. (2020) geoBoundaries: A global database of political administrative boundaries. PLoS ONE 15(4): e0231866. https://doi.org/10.1371/journal.pone.0231866e.
AHDR: Arctic Human Development Report, four million people live inside this border.
10 C July Isotherm: USGS 2023.
Map created with QGIS.