Oceanographic station data from bottle and CTD casts from the BOUTWELL from Ocean Weather Station E (OWS-E) in the North Atlantic Ocean 23 September 1969 to 21 October 1969 (NODC Accession 7000093)

Oceanographic station data were collected from the BOUTWELL within a 1-mile radius of Ocean Weather Station E (3500N 04800W) and in transit. Data were collected by the United States Coast Guard (USCG) from 23 September 1969 to 21 October 1969. 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“鲍特韦尔”号（BOUTWELL），采集范围覆盖E号海洋气象站（35°00′N，048°00′W）周边1英里海域及航行途中。数据由美国海岸警卫队（United States Coast Guard, USCG）于1969年9月23日至1969年10月21日期间采集，并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）。格式完整说明可从NODC官网https://www.nodc.noaa.gov/General/NODC-Archive/sd2.html获取。

SD2格式包含离散深度层级下记录的物理化学海洋学数据。绝大多数观测采用多瓶南森采水器（multi-bottle Nansen casts）或其他类型水体采样器完成，约5%的观测数据则通过电子CTD（conductivity-temperature-depth，电导率-温度-深度）仪或STD（salinity-temperature-depth，盐度-温度-深度）记录仪获取。不过，CTD/STD数据按照与南森采水器采样数据一致的深度层级上报至NODC，并与南森采样数据采用相同流程进行处理与存储。每个海洋站均附带航次信息（如船舶、所属国家、机构）、站位坐标、日期与时间等元数据。观测的核心参数为温度与盐度，同时也可上报溶解氧、磷酸盐、总磷、硅酸盐、硝酸盐、亚硝酸盐及pH值等其他参数。采样时的气象条件（如气温、气压、风向风速、海浪情况）同样可被记录，此外还可附带辅助数据，例如水体颜色（福尔-乌勒色标，Forel-Ule scale）、水体透明度（塞氏盘深度，Secchi disk depth）以及海底深度。密度（σ_t）、声速及动态深度异常值均可通过实测参数计算得到。每个海洋站数据集既包含实测深度层级下的观测数据，同时也包含经插值得到的标准深度层级数据。