Oceanographic station data from bottle casts from the MCCULLOCH from Ocean Weather Station D (OWS-D) in the North Atlantic Ocean 17 October 1970 to 06 November 1970 (NODC Accession 7100190)

Oceanographic station data were collected from the MCCULLOCH 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 17 October 1970 to 06 November 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“麦卡洛克”号（MCCULLOCH），覆盖范围为海洋气象站D（Ocean Weather Station D，44°00′N，41°00′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1970年10月17日至1970年11月6日采集完成，随后由国家海洋数据中心（National Oceanographic Data Center, NODC）处理为NODC标准站数据II输出格式（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格式包含离散深度层记录的物理化学海洋学数据。绝大多数观测通过多瓶南森（Nansen）采水剖面或其他类型水体采样器完成，仅少量（约5%）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。尽管如此，CTD/STD数据仍以与南森采水剖面数据一致的深度层级上报至NODC，并按照与南森采水数据相同的流程完成处理与存储。每个站位均附带航次信息（如船舶、所属国家、研究机构）、位置、日期与时间。核心观测参数为温度与盐度，同时也可记录溶解氧、磷酸盐、总磷、硅酸盐、硝酸盐、亚硝酸盐及pH值。采水作业时的气象条件（如气温、气压、风向风速、海浪状况）同样可被记录，此外还包括水体颜色（福勒-于勒（Forel-Ule）色标）、水体透明度（塞氏盘深度）及海底深度等辅助数据。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。每个站位既包含实测深度层的观测数据，也包含插值至一组标准深度层的数据集。