permafrost Definition

ground, icecap, arctic, arctic ocean, glaciation, tundra, subsurface, subarctic, lithosphere, polar, deglaciation, meltwater, plate tectonics, seafloor, antarctic peninsula, crustal, arctic circle, ellesmere island, snowpack, methane, seabed, laptev sea, geological, glaciers, volcanism, sediments, quaternary period, amundsen sea, weddell sea, peat bog, hydrosphere, moulins, asthenosphere, melting, regolith, hydrologic cycle, ross ice shelf, muskeg, loess, icefield, mammoths, ice shelf, svalbard, poleward, landforms, magma, tropopause, boreal, pikas, lavas, megafauna, arctic archipelago, sedimentary rock, moraine, interglacial, soils, crustal plate, paleoclimatology, thermosphere, mesosphere, holocene epoch, water vapor, taiga, eskers, semidesert, kerogen, syrtis major, carbon dioxide, phyllosilicate, tectonics, anticlines, exosphere, ice mass, fumarole, albedo, talus, foraminifera, paleogene, volcanoes, massifs, spitsbergen, neogene, supercontinent, firn, bellingshausen sea, circumpolar, hadean, brachiopods, troposphere, snowcap, peatland, upwelling, paleontological, frigid zone, acidification, thermocline, intertidal, ecosystems, woolly rhinoceros, pleistocene,