Response of Permafrost to Surface Temperature Changes: Field Measurements Program

深部多年冻土温度代表了多年冻土面温度历史的系统运行平均值。全球变化，例如与大气中二氧化碳含量增加相关的气候变暖，反映在永久冻土温度剖面中。对极地土地的使用产生重大影响的许多严重的环境和工程问题都与永久冻土融化有关。然而，由于钻孔附近的地表干扰，关于阿拉斯加永久冻土热状况的数据非常稀少，而且大多无法使用。这项调查将测量跨阿拉斯加管道走廊沿线16个未受干扰的地点以及阿拉斯加其他15个分布广泛的地点的永久冻土温度。测量将包括空气、地面、活动层、永久冻土表和80米或更深的永久冻土中的温度。该项目还将调查活动层厚度的变化以及永久冻土表或底部的任何融化。

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.