Oceanographic station data from CTD casts from the USCGC SHERMAN from Ocean Weather Station B (OWS-B) in the North Atlantic Ocean from 08 September 1973 to 28 September 1973 (NODC Accession 7400255)

Oceanographic station data were collected from the USCGC SHERMAN 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 08 September 1973 to 28 September 1973. 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.本数据集的海洋台站数据由美国海岸警卫队“谢尔曼”号（USCGC SHERMAN）于海洋气象站B（56°30′N，51°00′W）周边1英里范围内及航行途中采集。数据采集工作由美国海岸警卫队（United States Coast Guard, USCG）于1973年9月8日至9月28日完成。所有数据经美国国家海洋数据中心（National Oceanographic Data Center, NODC）处理，统一为NODC标准台站数据II输出格式（Station Data II Output Format, SD2）。完整格式说明可从NODC官网获取，网址为www.nodc.noaa.gov/General/NODC-Archive/sd2.html。 SD2格式存储离散深度层级下记录的物理海洋与化学海洋学数据。多数观测采用多瓶南森采水器或其他类型水样采集器完成，仅约5%的观测数据通过电子CTD（电导率-温度-深度）或STD（盐度-温度-深度）记录仪获取。需说明的是，CTD/STD数据以与南森采水数据一致的深度层级上报至NODC，并与南森采水数据采用完全相同的流程进行处理与存储。每个台站均记录有航次信息（如船舶、所属国家、研究机构）、站位坐标、日期与时间。核心测量参数以温度与盐度为主，同时可上报溶解氧、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、浪况）亦可被记录，辅助数据则包括水色（福勒-于勒色标，Forel-Ule scale）、水体透明度（塞氏盘深度，Secchi disk depth）及海底水深。密度（σ-t）、声速与动力深度异常值可通过实测参数计算得到。每个台站既包含实测深度层级下的原始观测数据，也包含经插值得到的标准深度层级数据集。