Oceanographic station data from bottle casts from the MENDOTA from Ocean Weather Station D (OWS-D) in the North Atlantic Ocean from 16 July 1971 to 04 August 1971 (NODC Accession 7200027)

Oceanographic station data were collected from the MENDOTA within a 1-mile radius of Ocean Weather Station D (4400N 4100W) and in transit. Data were collected by the United States Coast Guard (USCG) from 16 July 1971 to 04 August 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，采集自科考船门多塔号（MENDOTA）在海洋气象站D（44°00′N，41°00′W）周边1英里范围内的作业区域及航行途中。该数据由美国海岸警卫队（United States Coast Guard, USCG）于1971年7月16日至1971年8月4日期间采集完成。美国国家海洋数据中心（National Oceanographic Data Center, NODC）已将所有数据处理为NODC标准站数据II输出格式（Station Data II Output Format, SD2）。完整的格式说明可通过NODC官方链接获取：www.nodc.noaa.gov/General/NODC-Archive/sd2.html。

SD2格式包含离散深度层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Nansen采水器或其他类型水体采样装置完成，仅约5%的观测数据通过电子CTD（电导率-温度-深度）或STD（盐度-温度-深度）记录仪获取。但CTD/STD数据均已按与Nansen采水数据一致的深度层级上报至NODC，并与Nansen采水数据采用相同流程完成处理与存储。每个观测站均附带航次信息（如船舶、所属国家、所属机构）、观测位置、日期与时间等内容。核心观测参数以温度与盐度为主，但同时可报告溶解氧、磷酸盐、总磷、硅酸盐、硝酸盐、亚硝酸盐及pH值等指标。采水作业时刻的气象条件（如气温、气压、风向风速、海浪状况）也可被记录，同时附带的辅助数据还包括水色（福勒-尤勒色标，Forel-Ule scale）、水体透明度（塞氏盘深度，Secchi disk depth）及海底深度等。密度（sigma-t）、声速及动力深度异常等参数可通过实测数据计算得到。每个观测站既包含实测深度层的原始观测数据，同时也附带经插值得到的标准深度层级数据集。