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thermokarst 英θərməʊ'kɑːst美θərməʊ'kɑːst COCA²¹⁵⁹³⁰BNC²³⁶²¹³⁺¹ 基本例句 热喀斯特,热岩溶 In the large image, the area behind the shoreline is pockmarked by marshes, ponds, and hummocks characteristic of “ thermokarst, ” landscapes created by the melting and refreezing of permafrost. 在大图中,海岸线后面的区域由湿地、池塘、热融冰丘形成了凹陷,融化的以及重新冻结的冻土层形成了这种景观。 yeeyan Thermokarst failures occur when permafrost—a layer of frozen soil in Earth's polar regions—thaws and becomes unstable, possibly releasing greenhouse gases into the atmosphere. 随着永久冻土带消溶和分崩离析,热喀斯特现象大量出现,埋藏于地下的甲烷等温室气体可能散发到大气中。 gogoenglish |