Oceanographic station data from bottle casts from the BERING STRAIT from Ocean Weather Station V (OWS-V) in the North Pacific Ocean 17 November 1968 to 05 December 1968 (NODC Accession 6900563)

Oceanographic station data were collected from the BERING STRAIT within a 1-mile radius of Ocean Weather Station V (3400N 16400E) and in transit. Data were collected by the United States Coast Guard (USCG) from 17 November 1968 to 05 December 1968. 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白令海峡区域，涵盖海洋气象站V（34°00′N，164°00′E）周边1英里范围及航行途经海域。数据采集工作由美国海岸警卫队（United States Coast Guard, USCG）于1968年11月17日至1968年12月5日期间完成。数据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（Station Data II Output Format, SD2）。完整格式说明可通过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数据。绝大多数观测采用多瓶南森采水装置或其他类型的水体采样器完成。少量数据（约占总量5%）通过电子电导率-温度-深度（Conductivity-Temperature-Depth, CTD）记录仪或盐度-温度-深度（Salinity-Temperature-Depth, STD）记录仪获取。不过，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，因此其处理与存储流程与南森采水数据完全相同。每个海洋站均附带航行信息（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。采水作业时的气象条件（如气温、气压、风向风速、海浪情况）亦可被记录，同时附带辅助数据，包括水色（福勒-尤勒（Forel-Ule）色标）、水体透明度（塞氏盘（Secchi disk）深度）及海底水深。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。每个海洋站数据集既包含实测深度层级下的观测数据，也包含插值至标准深度层级的数值。