Oceanographic station data from bottle casts from the KLAMATH from Ocean Weather Station N (OWS-N) in the North Pacific Ocean 31 May 1971 to 21 June 1971 (NODC Accession 7101384)

Oceanographic station data were collected from the KLAMATH 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 31 May 1971 to 21 June 1971. 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KLAMATH号科考船，观测区域覆盖海洋气象站N（30°00′N，140°00′W）周边1英里范围及航行途中。数据采集时间为1971年5月31日至1971年6月21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官方网址https://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。绝大多数观测采用多瓶南森采水作业或其他类型水体采样器完成，约5%的少量数据则通过电子CTD（电导率-温度-深度，Conductivity-Temperature-Depth）或STD（盐度-温度-深度，Salinity-Temperature-Depth）记录仪获取。需说明的是，CTD/STD数据已按照与南森采水数据一致的深度层级提交至NODC，并与南森采水数据采用相同流程进行处理与存储。每个站位均附带航次信息（如船舶、所属国家、研究机构）、站位位置、观测日期与时间。核心观测参数为温度与盐度，同时可能包含溶解氧、磷酸盐、总磷、硅酸盐、硝酸盐、亚硝酸盐及pH值等指标。观测时的气象条件（如气温、气压、风向风速、海况）也可能被记录，此外还包含水色（福勒-于勒标度，Forel-Ule scale）、透明度（塞氏盘深度，Secchi disk depth）及海底水深等辅助数据。研究人员可通过实测参数计算得到密度（sigma-t）、声速及动力深度异常值。每个站位数据集既包含实测深度层的观测数据，同时也包含经插值得到的标准深度层数据。