Physical oceanography from mooring KPO_1266@en

GEOMAR moorings are typically equipped with instruments recording pressure, temperature, conductivity, dissolved oxygen and current velocity. Instruments with pressure, temperature, conductivity and oxygen sensors were calibrated in situ immediately prior to and after a mooring deployment period by attaching them to the CTD frame during CTDO casts. Correction terms were then developed from the difference between the sensor readings and the calibrated CTDO data during several minute long calibration stops. These correction terms were then applied to the full deployment periods. This ensured best data quality with recognition of potential sensor drifts and also allowed for the estimation of calibration and measurement errors (Hahn et al. 2014, Bittig et al. 2018, Berx et al. 2019).GEOMAR锚系观测系统（GEOMAR moorings）通常搭载可同步记录压力、温度、电导率、溶解氧及海流流速的观测仪器。针对搭载压力、温度、电导率与溶解氧传感器的观测仪器，科研人员会在锚系投放时段的前后即刻，于走航CTDO（Conductivity-Temperature-Depth-Oxygen，温盐深溶解氧仪）观测期间，将其挂载至温盐深剖面仪（Conductivity, Temperature, Depth, CTD）框架上开展原位校准。随后基于数分钟校准停船时段内的传感器读数与经校准的CTDO数据之间的差值，推导得到校正系数，并将该校正系数应用于整个锚系投放观测周期。此举既通过识别潜在的传感器漂移保障了最优数据质量，同时也可实现校准与测量误差的估算（Hahn等，2014；Bittig等，2018；Berx等，2019）。