Ground-based sea ice thickness profiles

Sea ice thickness profiles were measured with surface-based electromagnetic induction, a standard geophysical method. This method returns the depth to the electrical conductivity horizon between the lower-conductivity sea ice and higher-conductivity sea water. We used a Geonics EM31 device in the so-called horizontal dipole configuration. Transects were made by towing the EM31 in a sled or kayak with periodic measurements of snow thickness and GPS location. Most transects also include Differential Global Positioning System (DGPS)-derived surface elevation measurements. Ice thickness was derived from the EM31 measurements using a calibration from apparent conductivity to ice thickness determined locally in Barrow (Mahoney et al. 2007). See the metadata files below for more information. Data Citation: Druckenmiller, M., H. Eicken, M. Kaufman, A. Mahoney. (Sept 25, 2008, Updated 2012). Ground-based sea ice thickness profiles (SIZONET). UCAR/NCAR -- CISL -- ACADIS. http://dx.doi.org/10.5065/D67P8W9T

本数据集采用地面电磁感应法——一种标准地球物理方法——测量海冰厚度剖面。该方法可测得低电导率海冰与高电导率海水之间的导电界面深度。
研究采用了标注为水平偶极配置的Geonics EM31设备。测线通过在雪橇或皮划艇上拖拽EM31设备完成，过程中同步周期性采集雪层厚度与GPS定位信息。多数测线还包含差分全球定位系统（Differential Global Positioning System, DGPS）获取的地表高程测量结果。
海冰厚度由EM31测量数据结合巴罗地区本地标定的视电导率-海冰厚度校准关系推导得出（Mahoney等人，2007年）。更多详细信息请参阅下方元数据文件。
数据引用：Druckenmiller, M.、H. Eicken、M. Kaufman、A. Mahoney。（2008年9月25日，2012年更新）。地面海冰厚度剖面（SIZONET）。UCAR/NCAR -- CISL -- ACADIS。http://dx.doi.org/10.5065/D67P8W9T