Oceanographic station data from bottle casts from the GALLATIN from Ocean Weather Station H (OWS-H) in the North Atlantic Ocean from 22 March 1977 to 30 March 1977 (NODC Accession 7700499)

Oceanographic station data were collected from the GALLATIN within a 1-mile radius of Ocean Weather Station H (3800N 07100W) and in transit. Data were collected by the United States Coast Guard (USCG) from 22 March 1977 to 30 March 1977. 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加拉丁号（GALLATIN）科考船，覆盖范围为海洋气象站H（38°00′N，71°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1977年3月22日至1977年3月30日期间采集。国家海洋数据中心（National Oceanographic Data Center, NODC）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）。完整的格式说明可从NODC官网获取，网址为https://www.nodc.noaa.gov/General/NODC-Archive/sd2.html。 SD2格式存储了离散深度层级下采集的物理化学海洋学数据。绝大多数观测采用多瓶式南森采水器（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CTD（conductivity-temperature-depth）或STD（salinity-temperature-depth）记录仪获取。不过，提交至NODC的CTD/STD数据的深度层级与南森采水数据保持一致，因此其处理与存储流程与南森采水数据完全相同。 每个海洋站均附带航行相关信息（如作业船只、所属国家、研究机构）、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，但数据集亦可包含溶解氧、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、海浪情况）亦可被收录，同时还包含辅助观测数据，例如水体颜色（弗洛尔-乌勒色标，Forel-Ule scale）、水体透明度（塞氏盘深度，Secchi disk depth）及海底深度。密度（sigma-t）、声速及动态深度异常值均由实测参数计算得到。每个海洋站既包含实测深度层级的观测数据，同时也附带经插值得到的标准深度层级数据集。