Oceanographic station data from bottle casts from the HAMILTON from Ocean Weather Station B (OWS-B) in the North Atlantic Ocean from 13 November 1972 to 06 December 1972 (NODC Accession 7300569)

Oceanographic station data were collected from the HAMILTON within a 1-mile radius of Ocean Weather Station B (5630N 5100W) and in transit. Data were collected by the United States Coast Guard (USCG) from 13 November 1972 to 06 December 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“汉密尔顿”号科考船，覆盖范围为海洋气象站B（北纬56°30′，西经51°00′）周边1英里海域及航行途中。美国海岸警卫队（United States Coast Guard, USCG）于1972年11月13日至12月6日完成了数据采集工作。国家海洋数据中心（National Oceanographic Data Center, NODC）将这批数据处理为NODC标准站数据II输出格式（Station Data II Output Format, 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级下记录的物理化学海洋学数据。多数观测采用多瓶式南森采水器（Nansen cast）或其他类型水体采样器完成，仅约5%的观测数据通过电子电导率-温度-深度（Conductivity-Temperature-Depth, CTD）记录仪或盐度-温度-深度（Salinity-Temperature-Depth, STD）记录仪获取。不过，CTD/STD数据是以与南森采水数据一致的深度层级上报至NODC，其处理与存储流程与南森采水数据完全一致。每个测站均记录航次信息（如船舶、所属国家、研究机构）、位置、日期及时间。核心观测参数以温度与盐度为主，但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、浪况）同样可能被记录，此外还会附带水色（福勒-乌勒色度标度，Forel-Ule scale）、水体透明度（塞氏盘深度，Secchi disk depth）及海底深度等辅助数据。研究人员可通过实测参数计算得到密度（sigma-t）、声速及动态深度异常值。每个测站既包含观测深度层级下的实测数据，同时也包含经插值得到的标准深度层级数据集。