Oceanographic station data from bottle casts from the DUANE from Ocean Weather Station C (OWS-C) in the North Atlantic Ocean 15 April 1971 to 04 May 1971 (NODC Accession 7101320)

Oceanographic station data were collected from the DUANE within a 1-mile radius of Ocean Weather Station C (5245N 03530W) and in transit. Data were collected by the United States Coast Guard (USCG) from 15 April 1971 to 04 May 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.本数据集为海洋站观测数据，采集自DUANE号，作业区域覆盖海洋气象站C（52°45′N，035°30′W）周边1英里范围及航行途中。该数据由美国海岸警卫队（United States Coast Guard, USCG）于1971年4月15日至1971年5月4日期间采集。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（Station Data II Output Format, SD2）。完整格式说明可从NODC官网获取，网址为www.nodc.noaa.gov/General/NODC-Archive/sd2.html。 SD2格式存储离散深度层采集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（multi-bottle Nansen casts）或其他类型的水体采样装置完成。仅约5%的观测数据通过电子电导率-温度-深度记录仪（CTD, conductivity-temperature-depth）或盐度-温度-深度记录仪（STD, salinity-temperature-depth）获取。不过，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。 每个海洋站均记录了航次信息（如船舶、所属国家、研究机构）、观测位置、日期与时间。核心观测参数以水温与盐度为主，同时可记录溶解氧、磷酸盐、总磷、硅酸盐、硝酸盐、亚硝酸盐及pH值等指标。此外，还可记录采水时的气象条件（如气温、气压、风向风速、海浪状况），以及水体颜色（福勒-于勒色标，Forel-Ule scale）、水体透明度（塞氏盘深度，Secchi disk depth）、海底水深等辅助数据。基于实测参数可计算得到密度（sigma-t）、声速及动态深度异常值。每个海洋站既包含实测深度层的观测数据，也包含插值至标准深度层级的数据集。