Oceanographic station data from bottle casts from the MINNETONKA from Ocean Weather Station N (OWS-N) in the North Pacific Ocean from 02 July 1972 to 28 July 1972 (NODC Accession 7201448)

Oceanographic station data were collected from the MINNETONKA 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 02 July 1972 to 28 July 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.

本数据集的海洋站数据采集自“明尼通卡”号（MINNETONKA），覆盖范围为N号海洋气象站（30°00′N，140°00′W）周边1英里海域及航行途中。数据采集时间为1972年7月2日至1972年7月28日，由美国海岸警卫队（United States Coast Guard, USCG）完成。数据已由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, SD2）。完整格式说明可通过NODC官网www.nodc.noaa.gov/General/NODC-Archive/sd2.html获取。

SD2格式包含离散深度层记录的物理-化学海洋学数据。多数观测采用多瓶式南森采水器（Nansen casts）或其他类型水体采样器完成，仅约5%的观测数据通过电子CTD（电导率-温度-深度，conductivity-temperature-depth, CTD）或STD（盐度-温度-深度，salinity-temperature-depth, STD）记录仪获取。需说明的是，CTD/STD数据按照与南森采水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一致。每个海洋站均会报告航次信息（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，同时也可报告溶解氧、磷酸盐、总磷、硅酸盐、硝酸盐、亚硝酸盐及pH值。观测时的气象条件（如气温、气压、风向风速、海浪状况）也可被记录，此外还包括水体颜色（福尔-尤勒色度标，Forel-Ule scale）、水体透明度（塞氏盘深度，Secchi disk depth）及海底深度等辅助数据。基于实测参数可计算得到密度（sigma-t）、声速及动态深度异常值。每个海洋站既包含实测深度层的原始观测数据，也包含经插值得到的标准深度层数据集。