Oceanographic station data from CTD and bottle casts from the MENDOTA from Ocean Weather Station B (OWS-B) in the North Atlantic Ocean from 19 August 1973 to 08 September 1973 (NODC Accession 7400087)

Oceanographic station data were collected from the MENDOTA within a 1-mile radius of Ocean Weather Station B (5630N 5100W) and in transit. Data were collected by the United States Coast Guard (USCG) from 19 August 1973 to 08 September 1973. 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.

本数据集的海洋站观测数据由门多塔号（MENDOTA）采集，采集区域涵盖海洋气象站B（56°30′N，51°00′W）周边1英里海域及航行途经区域。数据采集时间为1973年8月19日至1973年9月8日，采集方为美国海岸警卫队（United States Coast Guard, USCG）。数据已由国家海洋数据中心（National Oceanographic Data Center, NODC）处理为NODC标准站数据II输出格式（SD2）。该格式的完整说明可从国家海洋数据中心（NODC）官网的https://www.nodc.noaa.gov/General/NODC-Archive/sd2.html获取。

SD2格式存储了在离散深度层级采集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或其他类型的水体采样器完成。少量观测（约占总样本量的5%）采用电子CTD（电导率-温度-深度, CTD）记录仪或STD（盐度-温度-深度, STD）记录仪完成。不过，CTD/STD采集的数据均按照与南森采水数据一致的深度层级上报至国家海洋数据中心（NODC），且处理与存储方式与南森采水数据完全相同。每个海洋站均附带航行信息（如船舶、所属国家、所属机构）、观测位置、日期及时间。核心观测参数以温度和盐度为主，但同时也会记录溶解氧、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、风速、浪况）也可被记录，同时还会附带辅助观测数据，例如水体颜色（福勒-于勒色标, Forel-Ule scale）、水体透明度（塞氏盘深度, Secchi disk depth）以及海底深度。密度（sigma-t）、声速及动力深度异常值均由实测参数计算得到。每个海洋站数据集既包含实测深度层级的观测数据，也包含经插值得到的标准深度层级数据集。