Borehole Temperatures and Climate Chance-Observatory Mode

越来越多的证据表明，地球上部300米的钻孔温度剖面包含关于过去三个世纪地表温度历史的可恢复和有价值的信息，这一时期对气候变化研究至关重要。PI将(1)开发常规1MK(0.001 K)钻孔温度测井的能力，(2)根据现有理论评估钻孔的热稳定性(极限噪声水平)，(3)通过重复测井将钻孔温度剖面中的曲率划分为暂态和稳态分量，(4)在地面设置气象站，井下固定热敏电阻串，以“观测式”方式进行测试。这项研究将有助于确定在地表温度历史上设定误差界限的程序，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.