Physical oceanography from mooring KPO_1027

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锚系观测浮标通常搭载可记录压力、温度、电导率、溶解氧与流速的观测仪器。搭载压力、温度、电导率及溶解氧传感器的仪器，会在锚系布放周期的前后即刻，通过在CTDO剖面测量（CTDO casts）期间将其固定于温盐深仪（CTD）支架的方式完成原位校准。随后基于持续数分钟的校准停测时段内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。随后将这些校正系数应用于整个锚系布放观测周期。此举既通过识别潜在的传感器漂移保障了最优数据质量，同时也支持对校准误差与测量误差进行估算（Hahn等，2014；Bittig等，2018；Berx等，2019）。