Oceanographic station data from CTD casts from the ESCANABA from Ocean Weather Station D (OWS-D) in the North Atlantic Ocean 16 July 1970 to 10 August 1970 (NODC Accession 7100015)

Oceanographic station data were collected from the ESCANABA within a 1-mile radius of Ocean Weather Station D (4400N 04100W) and in transit. Data were collected by the United States Coast Guard (USCG) from 16 July 1970 to 10 August 1970. Data were processed by NODC to the NODC standard Station Data II Output Format (SD2). Full format description is available from NODC at www.nodc.noaa.gov/General/NODC-Archive/sd2.html.

The SD2 format contains physical-chemical oceanographic data recorded at discrete depth levels. Most of the observations were made using multi-bottle Nansen casts or other types of water samplers. A small amount (about 5 percent) were obtained using electronic CTD (conductivity-temperature-depth) or STD (salinity-temperature-depth) recorders. The CTD/STD data were reported to NODC at depth levels equivalent to Nansen cast data, however, and have been processed and stored the same as the Nansen data. Cruise information (e.g., ship, country, institution), position, date, and time, and reported for each station. The principal measured parameters and temperature and salinity , but dissolved oxygen, phosphate, total phosphorus, silicate, nitrate, nitrite, and pH may be reported. Meteorological conditions at the time of the cast (e.g., air temperature and pressure, wind, waves) may also be reported, as well as auxiliary data such as water color (Forel-Ule scale), water transparency (Secchi disk depth), and depth to bottom. Values of density (sigma-t) sound velocity, and dynamic depth anomaly are computed from measured parameters. Each station contains the measurements taken at the observed depth levels, but also includes data values interpolated to a set of standard depth levels.

本数据集的海洋站数据采集自“埃斯卡诺巴”号（ESCANABA），覆盖海洋气象站D（44°00′N，041°00′W）周边1英里海域及航行途中区域。数据采集工作由美国海岸警卫队（United States Coast Guard, USCG）于1970年7月16日至1970年8月10日期间完成。数据由美国国家海洋数据中心（NODC）处理为NODC标准站数据II输出格式（SD2）。完整格式说明可从NODC官网的https://www.nodc.noaa.gov/General/NODC-Archive/sd2.html获取。

SD2格式存储了离散深度层级下采集的物理化学海洋学数据。绝大多数观测采用多瓶南森采水器布放（multi-bottle Nansen casts）或其他类型水体采样器完成，仅少量（约占总样本5%）数据通过电子电导率-温度-深度仪（conductivity-temperature-depth, CTD）或盐度-温度-深度仪（salinity-temperature-depth, STD）记录仪获取。不过，CTD/STD数据将按照与南森采水数据一致的深度层级上报至NODC，其处理与存储流程也与南森采水数据完全相同。每个观测站均附带巡航相关信息（如作业船舶、所属国家、研究机构）、站位坐标、观测日期与时间。核心观测参数为温度与盐度，此外还可报告溶解氧、磷酸盐、总磷、硅酸盐、硝酸盐、亚硝酸盐及pH值等指标。采样时的气象条件（如气温、气压、风速、浪况）同样可被记录，辅助数据则包括水体颜色（福尔-尤勒色标，Forel-Ule scale）、水体透明度（塞氏盘深度，Secchi disk depth）及海底水深等。密度（sigma-t）、声速及动态深度异常值可通过实测参数计算得到。每个观测站既包含实测深度层级的原始观测数据，也包含经插值得到的标准深度层级数据集。