Oceanographic station data from CTD casts from the BOUTWELL from Ocean Weather Station B (OWS-B) in the North Atlantic Ocean from 28 August 1972 to 21 September 1972 (NODC Accession 7300209)

Oceanographic station data were collected from the BOUTWELL 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 28 August 1972 to 21 September 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.本海洋站数据采集自"BOUTWELL"号船舶，采集范围涵盖海洋气象站B（56°30′N，51°00′W）周边1英里半径海域及航行途中区域。数据由美国海岸警卫队（United States Coast Guard, USCG）于1972年8月28日至1972年9月21日期间采集完成。数据经国家海洋数据中心（National Oceanographic Data Center, NODC）处理，转换为NODC标准站数据II输出格式（Station Data II Output Format，简称SD2）。完整的格式说明可从NODC官网获取，网址为www.nodc.noaa.gov/General/NODC-Archive/sd2.html。 SD2格式包含离散水深层级下记录的物理化学海洋学数据。绝大多数观测数据通过多瓶式南森采水器（Nansen casts）或其他类型水体采样器获取。仅有约5%的少量数据采用电子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数据会按照与南森采水数据一致的水深层级上报至NODC，并与南森采水数据采用相同的流程进行处理与存储。每个测站的航行信息（如船舶、所属国家、研究机构）、站位坐标、日期与时间均会被记录。本次观测的核心测量参数为温度与盐度，同时亦可报告溶解氧、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、海浪状况）亦可被记录，辅助数据还包括水色（弗洛尔-于勒比色卡，Forel-Ule scale）、水体透明度（塞氏盘深度，Secchi disk depth）及海底水深。密度（sigma-t）、声速及动态深度异常的数值由实测参数计算得到。每个测站既包含观测水深层级下获取的原始实测数据，同时也包含经插值得到的标准水深层级数据集。