Oceanographic data of Time Series Station Spiekeroog for 2017

The Time Series Station Spiekeroog (TSS) was setup in 2002, in the tidal inlet between the East Frisian Islands of Langeoog and Spiekeroog in the Southern German Bight, at position 53°45′01.0″ N, 007°40′16.3″ E. The aim was to ensure the continuous measurement of physical, biological, chemical and meteorological parameters, even under extreme weather conditions such as storms, ice, and storm surges. The TSS was financed as part of the Deutsche Forschungsgemeinschaft (DFG) research unit BioGeoChemistry of Tidal Flats and the Ministry for Science and Culture of the Land of Lower Saxony (MWK). Here, sea level, water temperature and conductivity were measured in the year 2017. All raw data were revised and corrected for steps as range, outliers and stationarity checks. Water temperature and conductivity were measured in five different depths (4 m, 5.5 m, 7.5 m, 9.5 m, 11.5 m below MSL). Due to marine biofouling at the sensors and accompanying drift of instruments, the measured water temperature and conductivity data were corrected via linear regression by using reference data. As the water column in this region is well mixed and the water depth of the measurements varies with the tide, data from all five depths were averaged and referenced to a water depth of 4 m. Absolute salinity was derived from conductivity, temperature and pressure data according to TEOS 10. Data were smoothed and a quality flag was assigned for water temperature and salinity. The quality flags refer to the standard for data quality control of SeaDataNet https://www.seadatanet.org/ (0 = raw data, 1 = good data, 2 = probably good data, 3 = questionable data). A detailed description of the Time Series Station Spiekeroog, its structure and instrumentation can be found in Zielinski et al. (2022) and in Reuter et al. (2009).

施皮克岛时间序列站（Time Series Station Spiekeroog，TSS）于2002年建成并投入运行，坐落于德国湾南部东弗里西亚群岛海域朗厄奥格岛与施皮克岛之间的潮汐水道，地理位置为北纬53°45′01.0″、东经007°40′16.3″。该站的设立初衷为实现在风暴、海冰与风暴潮等极端天气条件下，对物理、生物、化学及气象参数的连续观测。施皮克岛时间序列站由德国研究基金会（Deutsche Forschungsgemeinschaft，DFG）的潮滩生物地球化学研究项目组以及下萨克森州科学与文化部（Ministry for Science and Culture of the Land of Lower Saxony，MWK）联合资助。2017年，该站开展了海平面、水温与电导率的观测工作。所有原始数据均经过修正与校验，涵盖量程校正、异常值剔除和平稳性检验等处理环节。本次观测的水温与电导率数据分别在5个不同深度采集，各深度相对于平均海平面（Mean Sea Level，MSL）分别为4米、5.5米、7.5米、9.5米、11.5米。由于传感器存在海洋生物污损现象且仪器伴随漂移问题，研究人员通过线性回归结合参考数据，对实测水温与电导率数据进行了校正。鉴于该区域水体混合充分，且观测水深随潮汐动态变化，研究人员对5个深度的观测数据取平均值，并将其参考基准调整至4米水深。绝对盐度根据TEOS-10标准，由电导率、水温与压力数据计算得到。研究人员对水温与盐度数据进行了平滑处理，并为其赋予质量标识。该质量标识遵循海洋数据网络（SeaDataNet）的数据质量控制标准（https://www.seadatanet.org/），其中0代表原始数据，1代表优质数据，2代表疑似优质数据，3代表存疑数据。关于施皮克岛时间序列站的详细结构、仪器配置与相关说明，可参考Zielinski等人（2022）以及Reuter等人（2009）的研究文献。