Oceanographic station data from bottle casts from the GRESHAM from Ocean Weather Station N (OWS-N) in the North Pacific Ocean 02 June 1968 to 26 June 1968 (NODC Accession 6900006)

Oceanographic station data were collected from the GRESHAM within a 1-mile radius of Ocean Weather Station N (3500N 04800W) and in transit. Data were collected by the United States Coast Guard (USCG) from 02 June 1968 to 26 June 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GRESHAM号，覆盖范围为海洋气象站N（北纬35°00′，西经48°00′）周边1英里半径区域以及航行途中。数据由美国海岸警卫队（United States Coast Guard, USCG）于1968年6月2日至1968年6月26日期间采集。数据由国家海洋数据中心（National Oceanographic Data Center, NODC）按照其制定的标准站数据II输出格式（Station Data II Output Format, SD2）进行处理。完整的格式说明可从NODC官网获取，网址为www.nodc.noaa.gov/General/NODC-Archive/sd2.html。 SD2格式存储了离散深度层级下记录的物理海洋与化学海洋学数据。大部分观测数据通过多瓶南森采水剖面（multi-bottle Nansen casts）或其他类型的水体采样器获取。少量数据（约占总数据量的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数据按照与南森采水剖面数据一致的深度层级上报至NODC，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，此外还可记录溶解氧、磷酸盐、总磷、硅酸盐、硝酸盐、亚硝酸盐以及pH值等数据。采水作业时的气象条件（如气温、气压、风向风速、海浪情况）也可被记录，同时还包含辅助观测数据，例如水体颜色（福勒-于勒色标，Forel-Ule scale）、水体透明度（赛克盘深度，Secchi disk depth）以及海底水深。密度（sigma-t）、声速以及动力深度距平的数值可通过实测参数计算得到。每个海洋站既包含实测深度层级下的原始观测数据，同时也包含插值至标准深度层级后的标准化数据集。