由温度测井反演地面地面温度历史的合理性及不足
Uncertainties and shortcomings of ground surface temperature histories derived from inversion of temperature logs
摘要：
根据地表历史分析钻孔温度数据可以为重建过去的气候提供有用的信息。因此，对不确定性和误差源的严格评估是对这种地面地面温度历史进行有意义解释的必要前提。本研究分析了最突出的不确定性来源。该过程的扩散性质使得反演相对稳健，对热扩散率的知识不完整。同样，产热的影响也很小。事实证明，对于过去1000到10万年的研究，温度记录的最大深度是至关重要的。最佳反演需要3000米以上。过去一两千年的重建只需要适度深的日志（>300米），但严重受到噪音数据。
英文摘要：
Analysing borehole temperature data in terms of ground surface history can add useful information to reconstructions of past climates. Therefore, a rigorous assessment of uncertainties and error sources is a necessary prerequisite for the meaningful interpretation of such ground surface temperature histories. This study analyses the most prominent sources of uncertainty. The diffusive nature of the process makes the inversion relatively robust against incomplete knowledge of the thermal diffusivity. Similarly the influence of heat production is small. It turns out that for investigations of the last 1000 to 100000 years the maximum depth of the temperature log is crucial. More than 3000 m are required for an optimal inversion. Reconstructions of the last one or two millennia require only modestly deep logs (>300 m) but suffer severely from noisy data.
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