Oceanographic station data from bottle casts from the MELLON from Ocean Weather Station N (OWS-N) in the North Pacific Ocean from 20 May 1973 to 16 June 1973 (NODC Accession 7400032)

Oceanographic station data were collected from the MELLON within a 1-mile radius of Ocean Weather Station N (3000N 14000W) and in transit. Data were collected by the United States Coast Guard (USCG) from 20 May 1973 to 16 June 1973. 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“MELLON”号平台，采集范围覆盖海洋气象站N（30°00′N，140°00′W）周边1英里范围内及航行途中。数据由美国海岸警卫队（United States Coast Guard, USCG）于1973年5月20日至1973年6月16日期间采集，后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）。完整的格式说明可通过NODC官网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剖面或其他类型水体采样器完成，仅约5%的观测数据通过电子电导率-温度-深度仪（conductivity-temperature-depth, CTD）或盐度-温度-深度记录仪（salinity-temperature-depth, STD）获取。尽管CTD/STD数据上报至NODC时的深度层级与南森采水剖面数据一致，但其处理与存储方式与南森采样数据完全相同。 每个站位均记录有航行相关信息（如船舶、所属国家、研究机构）、站位位置、观测日期与时间。核心观测参数以温度和盐度为主，同时可能记录溶解氧、磷酸盐、总磷、硅酸盐、硝酸盐、亚硝酸盐及pH值。采样时的气象条件（如气温、气压、风速、浪况）也可被同步记录，此外还可附带水体颜色（福勒-于勒色标，Forel-Ule scale）、水体透明度（塞氏盘深度，Secchi disk depth）及海底水深等辅助数据。密度（σ_t）、声速及动态深度异常值由实测参数计算得到。每个站位既包含实测深度层级下的原始观测数据，也包含插值至标准深度层级后的标准化数据集。