Borehole derived Pine Island Glacier mean annual temperatures - collected 2014-2015

Table with measurements of mean annual temperature in degrees Celsius at 22 sites in Pine Island Glacier, located by hand held Garmin GPS position, and altitude recorded by survey quality Leica GPS.
The mean annual temperature of a remote ice sheet site is generally agreed to be equivalent to the temperature measured at 10m depth in a borehole. This dataset records the 10m temperatures at 22 remote sites in the Pine Island Glacier region of the West Antarctic Ice Sheet. Data were recorded on a single thermistor logging thermometer for a period of 12 to 24 hours on the date noted in table (marked in table as 'Single thermistor') or as the mean of two cables with parallel triple thermistors measured at a single time (date/time noted in table) after a minimum of 12 hours settling in the borehole (marked in table as 'Average of six thermistors'). Measurements were made independently in two boreholes: one drilled to approximately 12m for deployment of a neutron source ice density probe (marked in table as '10m temperature Neutron Probe borehole'); one drilled to approximately 50m during recovery of an ice core (marked in table as '10m temperature Ice Core borehole').
Some have argued that the mean annual temperature is better measured at 15m in a borehole to remove any trace of the seasonal surface temperature cycle. In the table we additionally record the temperature in the ice core borehole at 15m (marked in table as '15m temperature Ice Core borehole') using a logging PT-100 temperature device (marked in table as 'Single PT-100').

本数据集表格记录了西南极冰盖松岛冰川（Pine Island Glacier）区域内22个测点的年均气温（单位：摄氏度）数据，测点位置由手持Garmin（佳明）GPS定位，海拔高度通过测量级Leica（徕卡）GPS获取。

学界普遍认为，偏远冰盖测点的年均气温与钻孔10米深度处的测温值等效。本数据集记录了西南极冰盖松岛冰川区域内22个偏远测点的10米处冰温数据。数据采集方式分为两类：一类是使用单支热敏电阻测温记录仪连续记录12至24小时，对应表格中标注为"Single thermistor（单支热敏电阻）"的条目；另一类是将带有三组并行热敏电阻的两根电缆置于钻孔内静置至少12小时后，在单次测量时刻取其平均温度，对应表格中标注为"Average of six thermistors（六支热敏电阻平均值）"的条目。本次测量在两个独立钻孔中完成：一个钻孔钻进至约12米深度，用于部署中子源冰密度探头，对应表格中标注为"10m temperature Neutron Probe borehole（10米冰温-中子探头钻孔）"；另一个钻孔在冰芯回收过程中钻进至约50米深度，对应表格中标注为"10m temperature Ice Core borehole（10米冰温-冰芯钻孔）"。

有研究提出，为消除季节性地表温度循环的残留影响，年均气温的最优测量深度应为钻孔15米处。本表格额外记录了冰芯钻孔内15米深度处的冰温，对应表格中标注为"15m temperature Ice Core borehole（15米冰温-冰芯钻孔）"的数据，采用PT-100测温记录仪采集，对应表格中标注为"Single PT-100（单支PT-100）"的条目。