Building on previous mapping efforts, the objective of this paper is to compile the first digital pan-Arctic Yedoma map and spatial database of Yedoma coverage. Therefore, a detailed assessment of the current pan-Arctic Yedoma coverage is of importance to estimate its potential contribution to permafrost-climate feedbacks, assess infrastructure vulnerabilities, and understand past environmental and permafrost dynamics. Finally, understanding the distribution of the Yedoma domain area provides a window into the Pleistocene past and allows reconstruction of Ice Age environmental conditions and past mammoth-steppe landscapes. In addition, this ice-rich ground is of special concern for infrastructure stability as the terrain surface settles along with thawing. This mobilization of elements has local and global implications: increased thaw in thermokarst or thermal erosion settings enhances greenhouse gas fluxes from permafrost regions. When Yedoma deposits thaw, large amounts of frozen organic matter and biogeochemically relevant elements return into current biogeochemical cycles. Ice-rich permafrost in the circum-Arctic and sub-Arctic (hereafter pan-Arctic), such as late Pleistocene Yedoma, are especially prone to degradation due to climate change or human activity.

18North-East Science Station, Pacific Geographical Institute of the Russian Academy of Sciences, Cherskii, Russia.

17Institute for Geography, Leipzig University, Leipzig, Germany.

16Geographical Faculty, Lomonosov Moscow State University, Moscow, Russia.

15Institute of Physicochemical and Biological Problems in Soil Science, Russian Academy of Sciences, Pushchino, Russia.

14North-East Interdisciplinary Scientific Research Institute, Magadan, Russia.

13Institute of Geography of the Russian Academy of Sciences, Moscow, Russia.12Yamal-Nenets Center of Arctic Research, Salekhard, Russia.11Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK, United States.10Institute of Northern Engineering, University of Alaska Fairbanks, Fairbanks, AK, United States.9Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden.8Department of Physical Geography, Stockholm University, Stockholm, Sweden.7Scientist Emeritus, Formerly United States Geological Survey, Menlo Park, CA, United States.6Laboratory of General Geocryology, Melnikov Permafrost Institute, Yakutsk, Russia.5Institute of Geosciences, University of Potsdam, Potsdam, Germany.4Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB, Canada.3Geography Department, UniversitГ© de MontrГ©al, MontrГ©al, QC, Canada.2Laboratory of Permafrost Landscapes, Melnikov Permafrost Institute, Yakutsk, Russia.1Permafrost Research Section, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam, Germany.Jongejans 1,5, Mikhail Kanevskiy 10, Alexander Kholodov 11, Viktor Kunitsky 6, Gleb Kraev 12,13, Anatoly Lozhkin 14, Elizaveta Rivkina 15, Yuri Shur 10, Christine Siegert 1, Valentin Spektor 6, Irina Streletskaya 16, Mathias Ulrich 17, Sergey Vartanyan 14, Alexandra Veremeeva 15, Katey Walter Anthony 10, Sebastian Wetterich 1, Nikita Zimov 18 and Guido Grosse 1,5 Fedorov 2, Daniel Fortier 3, Duane Froese 4, Matthias Fuchs 1, Frank GГјnther 1,5, Mikhail Grigoriev 6, Jennifer Harden 7, Gustaf Hugelius 8,9, Loeka L. Jens Strauss 1*, Sebastian Laboor 1, Lutz Schirrmeister 1, Alexander N.

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