Borehole Temperatures and Climate Chance-Observatory Mode

越来越多的证据表明，地球上方300米的钻孔温度剖面包含了过去三个世纪（气候变化研究的关键时期）地表温度历史的可恢复和有价值的信息。PI将(1)开发常规1 mK （0.001 K）的钻孔温度测井能力，(2)根据现有理论评估钻孔的热稳定性（最终噪声水平），(3)通过重复测井将井眼温度剖面的曲率划分为瞬态和稳态分量。(4)采用地面气象站、井下固定热敏电阻串的“天文台模式”测试井。这项研究将有助于确定在地表温度历史上设置误差界限的程序，并从钻孔温度剖面中提取有关气候变化的最大信息。

There is growing evidence that borehole temperature profiles in the upper 300 m of the earth contain recoverable and valuable information on surface temperature histories over the last three centuries, a time period critical for climate change studies. The PI will (1) develop a capability for routine 1 mK (0.001 K) temperature logging of drillholes, (2) evaluate the thermal stability of drillholes (ultimate noise level) in relation to existing theory, (3) partition curvature in borehole temperature profiles into transient and steady-state components through repeat logging, and (4) instrument a test borehole to be used in "observatory mode" with a weather station at the surface and fixed thermistor string down hole. The study will help define procedures for placing error bounds on surface temperature histories and extracting maximum information on climate change out of borehole temperature profiles.