Map of Northern Circumpolar Permafrost Zone

Map of the northern circumpolar permafrost zone, highlighting the extent of the yedoma permafrost region (indicated in yellow and red). Map image and copyright permission courtesy of Macmillan Publishers Ltd, from NATURE, Schuur et al., 2015, Climate change and the permafrost carbon feedback, doi:10.1038/nature14338, copyright 2015.