Oceanographic station data from CTD casts from the YAKUTAT from Ocean Weather Station B (OWS-B) in the North Atlantic Ocean 08 June 1969 to 01 July 1969 (NODC Accession 7000013)

Oceanographic station data were collected from the YAKUTAT within a 1-mile radius of Ocean Weather Station B (5630N 05100W) and in transit. Data were collected by the United States Coast Guard (USCG) from 08 June 1969 to 01 July 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.

本数据集为海洋站观测数据，采集自海洋气象站B（56°30′N，51°00′W）周边1英里范围内及航行途中的“YAKUTAT”海域。数据由美国海岸警卫队（United States Coast Guard, USCG）于1969年6月8日至1969年7月1日期间采集，经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，简称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格式存储离散深度层级下记录的物理化学海洋学观测数据。多数观测采用多瓶南森采水剖面装置或其他类型水样采集设备完成，仅约5%的少量数据通过电子CTD（电导率-温度-深度仪，conductivity-temperature-depth）或STD（盐度-温度-深度仪，salinity-temperature-depth）记录仪获取。不过，CTD/STD数据均按照与南森采水剖面一致的深度层级上报至NODC，并与南森采水数据采用相同流程进行处理与存储。每个测站均记录航次信息（如船舶、所属国家、研究机构）、站位坐标、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值等指标。采水作业时的气象条件（如气温、气压、风向风速、海浪状况），以及水色（福勒-乌勒色度标，Forel-Ule scale）、透明度（塞氏盘深度，Secchi disk depth）、海底深度等辅助数据也可一并收录。密度（sigma-t）、声速及动态深度异常值由实测参数计算得到。每个测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。