Oceanographic station data from bottle casts from the CHAUTAUQUA from Ocean Weather Station V (OWS-V) in the North Pacific Ocean 17 August 1969 to 06 September 1969 (NODC Accession 7000087)

Oceanographic station data were collected from the CHAUTAUQUA within a 1-mile radius of Ocean Weather Station V (3400N 16400E) and in transit. Data were collected by the United States Coast Guard (USCG) from 17 August 1969 to 06 September 1969. 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.

本数据集为海洋学站位观测数据，采集自“肖托夸”号（CHAUTAUQUA），覆盖范围包括海洋气象站V号（Ocean Weather Station V，坐标34°00′N，164°00′E）周边1英里半径海域及航行途经区域。数据由美国海岸警卫队（United States Coast Guard, USCG）于1969年8月17日至1969年9月6日期间采集完成，后经美国国家海洋数据中心（National Oceanographic Data Center, NODC）处理为NODC标准站位数据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www.nodc.noaa.gov/General/NODC-Archive/sd2.html查询获取。

SD2格式存储了离散深度层级下记录的物理-化学海洋学观测数据。绝大多数观测采用多瓶式南森采水器采样（multi-bottle Nansen casts）或其他类型水样采集器完成，仅约5%的少量数据通过电子CTD（电导率-温度-深度仪，conductivity-temperature-depth）或STD（盐度-温度-深度仪，salinity-temperature-depth）记录仪获取。不过，CTD/STD数据上报至NODC时所采用的深度层级与南森采水数据保持一致，因此其处理与存储流程与南森采水数据完全相同。

每个站位均需上报巡航相关信息（如船舶名称、所属国家、依托研究机构）、站位地理坐标、观测日期与时间。核心测量参数为温度与盐度，但也可同步上报溶解氧、磷酸盐、总磷、硅酸盐、硝酸盐、亚硝酸盐及pH值。采水作业时刻的气象条件（如气温、气压、风向风速、海况）亦可一并上报，此外还可附带水色（福勒-尤勒色度标，Forel-Ule scale）、水透明度（塞氏盘深度，Secchi disk depth）及海底深度等辅助观测数据。

密度（σ_t，sigma-t）、声速及动态深度异常值由实测观测参数计算得到。每个站位既包含观测深度层级下的原始实测数据，也包含经插值得到的标准深度层级数据集。