Most of the Arctic is covered in snow and ice, which are highly reflective; if snow and ice melt, the exposed soil, which absorbs heat, serves to accelerate warming.
北极大部分地区被冰雪覆盖,具有很强的反射性;如果冰雪融化,裸露的土壤吸收热量,有助于加速变暖。
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NASA hopes to find evidence for such theories by analyzing the ice contained in the soil of the red wasteland that the Mars Phoenix Lander touched down on.