Oceanographic station data from bottle casts from the MELLON from Ocean Weather Station V (OWS-V) in the North Pacific Ocean from 05 January 1972 to 10 January 1972 (NODC Accession 7201002)

Oceanographic station data were collected from the MELLON within a 1-mile radius of Ocean Weather Station V (3400N 16400W) and in transit. Data were collected by the United States Coast Guard (USCG) from 05 January 1972 to 10 January 1972. 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.

本数据集为海洋水文站观测数据，采集自“MELLON”号船舶，覆盖海洋气象站V（34°00′N，164°00′W）周边1英里海域及航行途中。数据由美国海岸警卫队（United States Coast Guard, USCG）于1972年1月5日至1972年1月10日期间采集。美国国家海洋数据中心（National Oceanographic Data Center, NODC）将所有数据处理为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官网的https://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。多数观测通过多瓶南森采水器（multi-bottle Nansen casts）或其他类型水样采集装置完成；少量（约占总量5%）数据则通过电子CTD（conductivity-temperature-depth，电导率-温度-深度）或STD（salinity-temperature-depth，盐度-温度-深度）记录仪获取。不过CTD/STD数据是以与南森采水数据一致的深度层级上报至NODC，因此其处理与存储流程与南森采水数据完全一致。每个海洋站均附带航行相关信息（如船舶、所属国家、所属机构）、站位坐标、观测日期与时间。核心观测参数以温度与盐度为主，但亦可同步上报溶解氧、磷酸盐、总磷、硅酸盐、硝酸盐、亚硝酸盐及pH值。采水作业时的气象条件（如气温、气压、风速、浪况）亦可被记录，辅助观测数据则包括水色（福勒-尤勒色度标，Forel-Ule scale）、水体透明度（塞氏盘深度，Secchi disk depth）及海底深度。密度（sigma-t）、声速及动力深度异常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，同时也附带经插值生成的标准深度层级数据集。