Oceanographic station data from bottle and CTD casts from the ABSECON from Ocean Weather Station C (OWS-C) and D (OWS-D) in the North Atlantic Ocean 26 July 1969 to 23 August 1969 (NODC Accession 7000068)

Oceanographic station data were collected from the ABSECON within a 1-mile radius of Ocean Weather Station C (5245N 03530W), D (4400N 04100W), and in transit. Data were collected by the United States Coast Guard (USCG) from 26 July 1969 to 23 August 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.

本数据集的海洋站数据采集自ABSECON航次，作业范围涵盖海洋气象站C（52°45′N，035°30′W）、D（44°00′N，041°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1969年7月26日至8月23日采集完成，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官方网站的www.nodc.noaa.gov/General/NODC-Archive/sd2.html 获取。

SD2格式存储离散深度层级下采集的物理化学海洋学数据。绝大多数观测通过多瓶式南森采水器（multi-bottle 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电导率-温度-深度（conductivity-temperature-depth, CTD）记录仪或盐度-温度-深度（salinity-temperature-depth, STD）记录仪获取。需说明的是，CTD/STD数据均按照与南森采水数据一致的深度层级上报至NODC，并与南森采水数据采用相同流程进行处理与存储。每个站点均附带航次相关信息（如作业船舶、所属国家、依托机构）、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，但同时可涵盖溶解氧、磷酸盐、总磷、硅酸盐、硝酸盐、亚硝酸盐及pH值等指标。采水作业时的气象条件（如气温、气压、风向风速、浪况）亦可纳入记录，同时附带水体颜色（弗洛尔-尤尔色度标，Forel-Ule scale）、水体透明度（塞氏盘深度，Secchi disk depth）及水底深度等辅助观测数据。密度（sigma-t）、声速及动态深度异常等指标可通过实测参数计算得到。每个站点既包含实测深度层级下的原始观测数据，同时也附带经插值得到的标准深度层级数据集。