Auxiliary data from SIMBA-type sea ice mass balance buoy 2015T22

Temperature and heating-induced temperature difference profiles were measured through the atmosphere, sea ice, and ocean using a SIMBA-type sea ice mass balance buoy equipped with a several meter long thermistor chain. The present dataset was recorded by SIMBA 2015T22 (original name Awi_71) installed on drifting sea ice in the Central Arctic Ocean during the expedition Polarstern PS94 (ARK29/3,TransArcII) in 2015. Data is available between 2015-09-02 18:15:00 and 2016-02-12 05:15:00. The thermistor chain was Variable 5 m long and included 240 sensors with a regular spacing of 2 cm. The resulting time series includes the evolution of temperature and temperature differences at 30 s and 120 s during a heating cycle of 120 s as a function of location, depth and time. The sampling intervals were usually between hourly and daily, but were most frequently configured to 6 hours for temperature, and 24 hours for temperature differences. In addition to temperatures and geographic location were measured. The present dataset was processed as follows: obvious inconsistencies (missing values) and unrealistic values of GPS position have been removed. This instrument was deployed as part of the project project Sea Ice Physics @ AWI (AWI_SeaIce).

本数据集通过搭载数米长热敏电阻链的SIMBA型海冰质量平衡浮标（SIMBA-type sea ice mass balance buoy），对大气、海冰及海洋中的温度与加热诱生温差廓线开展了观测。本次观测所用的SIMBA 2015T22浮标（原名为Awi_71）安装于北冰洋中央海域的流冰之上，随2015年“极星号”（Polarstern）科考航次PS94（ARK29/3，TransArcII）完成数据记录，数据集的有效时间范围为2015年9月2日18:15:00至2016年2月12日05:15:00。该浮标搭载的热敏电阻链为可变长度设计，最长可达5米，包含240个间距固定为2厘米的传感器。生成的时间序列涵盖了温度与温差的演化过程，观测基于120秒的加热周期，分别以30秒和120秒的间隔采集数据，且数据随观测位置、深度及时间动态变化。常规采样间隔介于每小时至每日之间，其中温度数据的采样频次多设置为每6小时一次，温差数据的采样频次多设置为每24小时一次。除温度参数外，观测还同步采集了地理位置信息。本数据集已完成标准化预处理：已剔除存在明显矛盾（含缺失值）的数据以及不合理的GPS位置数据。本观测仪器隶属于AWI海冰物理研究项目（AWI_SeaIce）。