Oceanographic station data from bottle casts from the SPENCER from Ocean Weather Station C (OWS-C) in the North Atlantic Ocean from 17 May 1972 to 07 June 1972 (NODC Accession 7201242)

Oceanographic station data were collected from the SPENCER within a 1-mile radius of Ocean Weather Station C (5245N 0352W) and in transit. Data were collected by the United States Coast Guard (USCG) from 17 May 1972 to 07 June 1972. 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“斯宾塞”号（SPENCER）科考船，覆盖范围为海洋气象站C（52°45′N，035°02′W）周边1英里海域及航行途中。数据由美国海岸警卫队（USCG）于1972年5月17日至1972年6月7日期间收集，并由国家海洋数据中心（NODC）处理为NODC标准站数据II输出格式（Station Data II Output Format，简称SD2）。完整格式说明可通过NODC官网https://www.nodc.noaa.gov/General/NODC-Archive/sd2.html查阅。
SD2格式收录了离散深度层级下记录的物理化学海洋学数据。绝大多数观测采用多瓶式南森采水器（Nansen cast）或其他类型水样采集器完成，仅约5%的少量数据通过电子CTD（电导率-温度-深度）或STD（盐度-温度-深度）记录仪获取。尽管CTD/STD数据上报至NODC时采用与南森采水数据一致的深度层级，但其处理与存储流程与南森采水数据完全一致。每个测站均记录有航次信息（如船舶、所属国家、依托机构）、站位坐标、观测日期与时间。核心观测参数为温度与盐度，同时亦可记录溶解氧、磷酸盐、总磷、硅酸盐、硝酸盐、亚硝酸盐及pH值等指标。采水作业时的气象条件（如气温、气压、风向风速、海浪状况）亦可被记录，此外还包含水体颜色（福尔-乌勒色标，Forel-Ule scale）、水体透明度（塞氏盘深度，Secchi disk depth）及海底深度等辅助观测数据。研究人员可通过实测参数计算得到密度（σ-t，sigma-t）、声速及动态深度异常值。每个测站既包含实测深度层级下的原始观测数据，同时也附带经插值得到的标准深度层级数据集。