Oceanographic station data from bottle casts from the KLAMATH from Ocean Weather Station N (OWS-N) in the North Pacific Ocean from 11 June 1972 to 06 July 1972 (NODC Accession 7201446)

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 11 June 1972 to 06 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.

本数据集采集自“克拉马斯号（KLAMATH）”，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海域。数据由美国海岸警卫队（United States Coast Guard，USCG）于1972年6月11日至7月6日收集，后经国家海洋数据中心（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https://www.nodc.noaa.gov/General/NODC-Archive/sd2.html 获取。

SD2格式存储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式南森采水器或其他类型水体采样设备完成，仅约5%的数据通过电子电导率-温度-深度（CTD）或盐度-温度-深度（STD）记录仪获取。尽管CTD/STD数据以与南森采水数据一致的深度层级上报至NODC，但已按照与南森采水数据完全相同的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，同时可上报溶解氧、磷酸盐、总磷、硅酸盐、硝酸盐、亚硝酸盐及pH值等参数。采样时刻的气象条件（如气温、气压、风向风速、海浪状况）亦可被记录，此外还可附带辅助数据，包括水色（福尔-尤勒水色标尺（Forel-Ule scale））、水体透明度（塞氏盘深度（Secchi disk depth））及海底深度。通过实测参数可计算得到密度（sigma-t，即密度距平）、声速及动力深度距平值。每个站位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级数据集。