Response of Permafrost to Surface Temperature Changes: Field Measurements Program

深层的冻土温度代表了 多年冻土表面温度历史的平均值。 全球变化，如与气候变化有关的 大气中二氧化碳含量的增加，反映在 冻土温度剖面 一系列严重的环境问题 和工程问题，有实质性的影响， 与永久冻土融化有关。 然而，在这方面， 关于阿拉斯加永久冻土热状况的数据非常稀少 由于钻头附近的地表扰动， 孔. 这项调查将测量16岁以下的永久冻土温度 穿越阿拉斯加管道走廊沿线沿着未受干扰的地点， 包括阿拉斯加的三个主要气候和永久冻土区， 阿拉斯加其他15个分布广泛的地点。 测量 将包括空气中的温度，在地面上， 活动层，在永久冻土表和永久冻土， 80米或更深。 该项目还将调查 活性层厚度的变化以及 永久冻土台或基地。

Permafrost temperatures at depth represent a systematic running mean of the temperature history of the permafrost surface. Global changes, such as climatic warming associated with increasing CO2 content in the atmosphere, are reflected in the permafrost temperature profiles. A host of serious environmental and engineering problems that have a substantial impact on the use of polar lands are associated with thawing permafrost. However, data on the thermal regime of permafrost in Alaska are very sparse and mostly unusable because of surface disturbances near the drill holes. This investigation will measure permafrost temperatures at sixteen undisturbed sites along the trans-Alaska pipeline corridor which includes Alaska's three major climate and permafrost zones and at fifteen other widely distributed sites in Alaska. Measurements will include temperatures in the air, at the ground surface, in the active layer, at the permafrost table and in the permafrost to depths of 80 meters or more. This project will also investigate changes in active layer thicknesses and any thawing at the permafrost table or base.