单词	thermokarst
释义	thermokarst /ˈθəːmə(ʊ)kɑːst / noun [mass noun] Geology A form of periglacial topography resembling karst, with hollows produced by the selective melting of permafrost.Deep permafrost thawing may result in irregular surface subsidence and thermokarst pits and mounds.... Warming of permafrost, thawing of ground ice, and development of thermokarst terrain have been documented over the past several decades. The forest owes its appearance to an adjacent lake, one of a number of thermokarst lakes in the region.
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