Oceanographic station data from bottle casts from the DUANE from Ocean Weather Station E (OWS-E) in the North Atlantic Ocean 30 June 1970 to 22 July 1970 (NODC Accession 7000964)

Oceanographic station data were collected from the DUANE 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 30 June 1970 to 22 July 1970. 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.

本数据集为采集自杜恩号（DUANE）的海洋站数据，覆盖范围涵盖海洋气象站E（35°00′N，48°00′W）周边1海里海域及航行途中。数据由美国海岸警卫队（United States Coast Guard, USCG）于1970年6月30日至1970年7月22日采集完成，后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）。完整的格式说明可通过NODC官方网址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。多数观测采用多瓶南森采水器（multi-bottle Nansen casts）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, CTD）或STD（盐度-温度-深度, STD）记录仪获取。需说明的是，CTD/STD数据上报至NODC时的深度层级与南森采水数据保持一致，因此其处理与存储方式与南森采水数据完全相同。每个观测站均附带航行信息（如船舶、所属国家、研究机构）、经纬度位置、观测日期与时间。核心观测参数为温度与盐度，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值等参数。采水作业时的气象条件（如气温、气压、风速、浪况）同样可被记录，此外还可附带辅助数据，例如水色（福勒-乌勒色标, Forel-Ule scale）、水体透明度（塞氏盘深度, Secchi disk depth）及水深。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。每个观测站既包含实测深度层级下的原始观测数据，同时也包含经插值得到的标准深度层级数据集。