Oceanographic station data from bottle casts from the DUANE from Ocean Weather Station D (OWS-D) in the North Atlantic Ocean from 09 September 1972 to 01 October 1972 (NODC Accession 7300485)

Oceanographic station data were collected from the DUANE within a 1-mile radius of Ocean Weather Station D (4400N 4100W) and in transit. Data were collected by the United States Coast Guard (USCG) from 09 September 1972 to 01 October 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杜安号（DUANE）科考船，采集范围覆盖海洋气象站D（44°00′N，41°00′W）周边1英里海域及航行途中。数据采集由美国海岸警卫队（United States Coast Guard, USCG）于1972年9月9日至1972年10月1日期间实施。数据由美国国家海洋数据中心（National Oceanographic Data Center, NODC）处理为NODC标准站数据II输出格式（Station Data II Output Format, SD2）。完整格式说明可从NODC官网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海洋与化学海洋学数据。绝大多数观测采用多瓶式Nansen采水器站位投放或其他类型水体采样器完成，仅约5%的观测数据通过电子CTD（conductivity-temperature-depth, 电导率-温度-深度）记录仪或STD（salinity-temperature-depth, 盐度-温度-深度）记录仪获取。但CTD/STD数据均按照与Nansen采水器采样数据一致的深度层级上报至NODC，其处理与存储流程与Nansen采水器数据完全一致。每个海洋站均附带航次信息（如作业船舶、所属国家、所属机构）、站位坐标、观测日期与时间等元数据。核心观测参数以温度和盐度为主，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值等指标。采样作业时的气象条件（如气温、气压、风向风速、海浪情况）也可被记录，此外还可附带水体颜色（福勒-乌勒比色法（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。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。每个海洋站既包含实测深度层级的观测数据，同时也附带经插值得到的标准深度层级数据集。