Year-round temperature measurements at 1600 m elevation during 1994 in the Asgard Range Antarctica, indicate that the mean annual frost point of the ice-cemented ground, 25 cm below the surface, is −21.7 ± 0.2°C and the mean annual frost point of the atmosphere is −27.5 ± 1.0°C. The corresponding mean annual temperatures are −24.9°C and −23.3°C. These results imply that there is a net flux of water vapour from the ice to the atmosphere resulting in a recession of the ice-cemented ground by about 0.4–0.6 mm yr1. The level of the ice-cemented permafrost is about 12 cm below the level of dry permafrost. The summer air temperatures would have to increase about 7°C for thawing temperatures to just reach the top of the subsurface ice. Either subsurface ice at this location is evaporating over time or there are sporadic processes that recharge the ice and maintain equilibrium over long timescales.

中文翻译：

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南极洲麦克默多干谷的土壤温度和结冰地面的稳定性

1994 年在南极洲阿斯加德山脉海拔 1600 米处的全年温度测量表明，地表以下 25 厘米处的冰水泥地面的年平均霜点为 -21.7 ± 0.2°C，年平均霜点为大气温度为 -27.5 ± 1.0°C。相应的年平均气温为 -24.9°C 和 -23.3°C。这些结果表明，存在从冰到大气的水蒸气净通量，导致冰水泥地面每年退缩约 0.4-0.6 毫米1. 结冰的永久冻土层比干燥的永久冻土层低约 12 厘米。夏季气温必须升高约 7°C 才能使温度解冻才能达到地下冰层的顶部。这个位置的地下冰要么随着时间的推移而蒸发，要么有零星的过程为冰补给并在很长一段时间内保持平衡。