Oceanographic station data from bottle casts from the DUANE from Ocean Weather Station H (OWS-H) in the North Atlantic Ocean from 10 February 1974 to 25 February 1974 (NODC Accession 7400519)

Oceanographic station data were collected from the DUANE within a 1-mile radius of Ocean Weather Station H (3800N 07100W) and in transit. Data were collected by the United States Coast Guard (USCG) from 10 February 1974 to 25 February 1974. 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.

本数据集为海洋站观测数据，由DUANE号科考船采集，观测范围覆盖海洋气象站H（38°00′N，71°00′W）周边1英里范围内海域及航行途中区域。该数据由美国海岸警卫队（United States Coast Guard, USCG）于1974年2月10日至2月25日期间采集完成。国家海洋数据中心（National Oceanographic Data Center, NODC）将所有数据处理为NODC标准站数据II输出格式（Station Data II Output Format, SD2）。完整的格式说明可通过NODC官方链接获取：www.nodc.noaa.gov/General/NODC-Archive/sd2.html。
SD2格式包含离散深度层级下记录的物理化学海洋学观测数据。绝大多数观测采用多瓶南森采水器（Nansen casts）或其他类型水样采集装置完成，仅约5%的观测数据通过电子电导率-温度-深度（conductivity-temperature-depth, CTD）仪或盐度-温度-深度（salinity-temperature-depth, STD）记录仪获取。但CTD/STD数据均按照与南森采水器观测一致的深度层级提交至NODC，其处理与存储流程与南森采水器数据完全一致。每个观测站均附带航次信息（如作业船只、所属国家、研究机构）、观测位置、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值等指标。观测采样时的气象条件（如气温、气压、风向风速、浪况）也可被同步记录，此外还可附带辅助观测数据，包括水色（福勒-尤勒色标，Forel-Ule scale）、水体透明度（塞氏盘深度，Secchi disk depth）及海底水深等。密度（sigma-t）、声速及动力深度异常等参数可通过实测数据计算得到。每个观测站既包含实测深度层级下的直接观测数据，也包含经插值至标准深度层级后的数据集。