Permafrost landform and environmental variable dataset for 7.5 x 7.5 km grid cells covering 14 Level IV Ecoregions of the Northwest Territories, Canada.

# Dataset for "Permafrost landsystems define regional variability in climate change effects on northern environments" Northwest Territories Geological Survey. 2026-01-20 Principal Investigator: Steve Kokelj Column descriptions for ## Attributes provided in Table 2, 25-32358A_SUPP_20260120.docx ## Attributes ### Gridcell data 1. "Q_CellName": Unique gridcell identifier 2. "ECO1_NAM_1": Biome 3. "ECO2_NAM_1": Ecozone 4. "ECO3_NAM_1": Ecoclimate Region 5. "ECO4_NAM_1": Landsystem Column descriptions for ## Thermokarst Mapping Collective derived observation data provided in Table 1, 25-32358A_SUPP_20260120.docx ### Thermokarst Mapping Collective derived observation data (response variables; presence/absence) 6. "RTS": Retrogressive Thaw slump 7. "Megaslump": Retrogressive thaw slump >400m 8. "Landslide_Shallow": Shallow landslide 9. "Landslide_Deep": Deep translational landslide 10. "Debris_Flow_Fan": Active colluvial fan 11. "Gullied_Terrain": Gullied terrain 12. "Rock_Glaciers": Rock glaciers 13. "Slump_Lakes": Slump-affected lake 14. "Lake_Drainage": Lake drainage 15. "Lowered_Water_Level": Lowered water level 16. "Ramparted_Lake": Ramparted lake 17. "Polygonal_Patterned_Ponding": Polygonal patterned ponding 18. "Thermokarst_Ponds": Thermokarst ponds 19. "Geometric_Lakes": Geometrically aligned lakes 20. "Littoral_Terraces": Littoral terraces 21. "Lake_Pond_Expansion": Expansion or development of lakes and ponds 22. "Patterned_Ponding_Expansion": Expansion or development of polygonal patterned ponds 23. "Polygonal_Terrain": Polygonal terrain 24. "Polygonal_Terrain_Upland": Upland polygonal terrain 25. "Polygonal_Terrain_Lowland": Lowland polygonal terrain 26. "Patterned_Forest_Lowland": Patterned forests in lowland areas 27. "Organic_Collapse_Scars": Collapse scars in organic terrain 28. "Organic_Drainage_Dendritic": Dendritic drainage networks in organic terrain 29. "Organic_Drainage_Rectangular": Rectangular drainage networks in organic terrain 30. "Organic_Drainage_MBC": Multibasinal drainage networks in organic terrain 31. "Patterned_Fens": Patterned fens in organic terrain 32. "Pingos": Pingos and conical mounds 33. "Involuted_Terrain": Involuted terrain Column descriptions for ### Environmental data provided in Table 3, 25-32358A_SUPP_20260120.docx ### Environmental data (predictor variables) 34. "t2m": Thirty-year mean of 2 m air temperature (1991-2020) [°C] 35. "sp": Thirty-year mean of total annual liquid precipitation (1991-2020) [m] 36. "swe": Thirty-year mean of total annual max of monthly swe (1991-2020) [m] 37. "burn_area": Total area per grid cell burnt by wildfire between 1996 and 2016 [m2] 38. "geomorph_var": Geomorphon (terrain position classifications) variety or how many different geomorphon features are found in each grid cell [-] 39. "HAND_mean": Mean Height Above Nearest Drainage (relative elevation between the grid cell and its nearest water stream) [m] 40. "flow_acc": Flow accumulation [km2] 41. "water_perc": Part of each grid cell covered by water [%]