Airborne sea ice parameters during aircraft flight P5_205_PAMARCMIP_2017_1704021401, Version 1@en

Airborne multi-instrument measurements of sea ice were made in April 2017 as part of the Polar Airborne Measurements and Arctic Regional Climate Model Simulation Project (PAMARCMIP) under the AWI IceBird campaign series. The data consist of four surveys spanning sea-ice covered areas in the Beaufort and Chukchi Seas. For each flight, the geolocated total (ice+snow) thickness data from an airborne electromagnetic (EM) induction sensor are provided with a point spacing of approximately 5-6 meters. Larger gaps in the trajectories arise from high-altitude calibrations of the EM sensor. The data are combined with collocated and simultaneous snow depth measurements from an airborne frequency-modulated continuous-wave ultrawideband radar, snow freeboard measurements from an airborne near-infrared laser scanner, and surface temperature measurements from an airborne infrared radiation pyrometer. Each value represents the average within the approximately 40 m diameter footprint of the EM sensor, thus representing a smoothed representation. These values are then used to derive further sea ice parameters such as sea ice bulk density. The trajectory data contain the full and unfiltered data record with quality flags.2017年4月，作为极地机载测量与北极区域气候模式模拟项目（PAMARCMIP）的组成部分，研究团队依托AWI IceBird航次系列开展了海冰机载多仪器观测任务。本次数据集涵盖覆盖波弗特海与楚科奇海海冰区域的4次飞行勘测任务。针对每一次飞行任务，数据集提供了由机载电磁感应传感器（EM）获取的经地理定位的海冰+积雪总厚度数据，测点间距约为5至6米。飞行轨迹中出现的较大间隙源于电磁传感器的高空校准流程。该数据集同步融合了多类同位机载观测数据：包括调频连续波超宽带雷达获取的积雪深度观测、近红外激光扫描仪获取的雪面干舷观测，以及红外辐射高温计获取的表面温度观测。每个数据值对应机载电磁感应传感器约40米直径观测足迹（footprint）内的平均观测结果，因此呈现为经过平滑处理的数值。后续可基于这些数值进一步推导海冰体密度等其他海冰相关参数。飞行轨迹数据包含完整且未经过滤的原始观测记录，并附带质量标记。