A Digital Thermometer to Enhance High Resolution Borehole Paleothermometry at Siple Dome and Beyond: a Unique Opportunity

0087273 waddington0087273 waddington0087273该合同支持开发和测试用于极冰片钻孔高精度温度测量的数字探头。这些测量是获得极地地区校准古温度记录的关键。目前最先进的系统是美国地质勘探局的极地钻孔温度记录系统（PBTS），该系统使用模拟探针技术和冰盖表面的电子包。强风会干扰记录电子设备，迫使现场团队修改物流计划，以产生高质量的数据。通过电缆传输数字信号的探头不会受到这些地面条件的影响，从而提高了现场作业的效率。该项目将采用最新设计的数字探头，与PBTS系统一起在低温的极地钻井液中使用。这些探头将减少当前模拟系统的一些严格的硬件和程序要求。这些新的数字探头将与目前使用的传感器一起进行校准，并将在simple Dome进行测试，这是一个已资助的井眼温度测井项目的一部分。最终产品（除了使用新型数字探头的钻孔温度记录系统外）将在冰川学杂志上发表，描述新探头，比较以及数字探头可以提供的新研究机会。

0087273 WaddingtonThis award supports the development and testing of digital probesfor high precision temperature measurements in boreholes in polarice sheets. These measurements are key to obtaining calibratedpaleotemperature records in the polar regions.The current state-of-the-art system is the USGS Polar BoreholeTemperature Logging System (PBTS), which uses analog probe technologywith the electronic package at the ice sheet surface. Strong winds candisturb the recording electronics, forcing the field team to modifylogistics plans to produce high quality data. Probes that transmitdigital signals up the cable would not be affected by these surfaceconditions, improving the efficiency of field operations. This projectwill adapt a recently-designed digital probe for use with the PBTS systemin cold temperatures in polar drilling fluids. These probes will reducesome of the stringent hardware and procedural requirements of the currentanalog system. These new digital probes will be calibrated alongside thecurrently used sensors and will be tested at Siple Dome as part of analready-funded program of borehole temperature logging. The final product(in addition to a working borehole temperature logging system with newdigital probes) will be a publication in the Journal of Glaciologydescribing the new probes, the comparisons, and the new researchopportunities that digital probes can offer.