计算多年冻土上限深度的地温法

本文以大量实测资料为基础,探讨了季节融化层导温性能及地温峰值滞后等自然因素对多年冻土上限深度的影响。还通过地表面的热效应和气温脉动的研究,讨论了多年冻土上限深度的小区域特点和未来期望值。提出了适合青藏高原多年冻土区计算多年冻土上限深度的半经验公式。由于主要依据是地温的分布和传导特征,故称之为“地温法”。

Ground Temperature Method--the Method for Calculating the Depth of Permafrost Table

Based on a lot of observed data, this paper approaches the effect of some natural factors, such as the thermal conductivity of seasonal thawing and the hysteresis of ground temperature peak on the depth of permafrost table. With the study of the thermal effect of ground surface and the pulsation of air temperature, we have a discussion on microregional features and expected value of the depth of permafrost table, and a semiempirical formula for calculating the depth of permafrost table on Qinghai-Xizang plateau permafrost area is suggested. Since the formula mainly based on the distribution and conduction of ground temperature, it is called "Ground Temperature Method