Temperature profiles from XBT casts from the GALLATIN and other platforms as part of the Marine Resources Monitoring, Assessment and Prediction (MARMAP) project from 17 April 1976 to 15 July 1976 (NODC Accession 7601794)

Temperature profiles were collected from XBT casts from the GALLATIN and other platforms from 17 April 1976 to 15 July 1976. Data were collected by the National Marine Fisheries Service (NMFS) and other institutions as part of the Marine Resources Monitoring, Assessment and Prediction (MARMAP) project. Data were processed by NODC to the NODC standard Universal Bathythermograph Output (UBT) format. Full format description is available from NODC at www.nodc.noaa.gov/General/NODC-Archive/bt.html. The UBT format contains temperature-depth profile data obtained using expendable bathythermograph (XBT) instruments. Cruise information, position, date and time were reported for each observation. The data records are comprised of pairs of temperature-depth values. The XBT data files contain temperature values at non-uniform depths. These depths were recorded at the minimum number of points (''''inflection points'''') required to accurately define the temperature curve. Standard XBTs can obtain profiles to depths of either 450 or 760 m. Special instruments permitted measurements to be obtained to 1830 m.1976年4月17日至1976年7月15日期间，研究团队通过“加拉廷号（GALLATIN）”及其他观测平台的投弃式温深仪（expendable bathythermograph，XBT）投放作业获取了温度剖面数据。该数据集由美国国家海洋渔业局（National Marine Fisheries Service，NMFS）及其他机构作为海洋资源监测、评估与预测（Marine Resources Monitoring, Assessment and Prediction，MARMAP）项目的一部分采集完成，后由国家海洋学数据中心（National Oceanographic Data Center，NODC）处理为符合其标准的通用温深仪输出（Universal Bathythermograph Output，UBT）格式。完整格式说明可通过NODC官网www.nodc.noaa.gov/General/NODC-Archive/bt.html查询获取。 UBT格式存储了通过投弃式温深仪（XBT）获取的温度-深度剖面数据。每条观测记录均包含航次信息、观测位置、观测日期与时间。数据记录由温度-深度值对构成。XBT数据文件中的温度值对应非均匀分布的深度测点，这些测点仅选取了精准刻画温度变化曲线所需的最少数量点，即“拐点（inflection points）”。标准型XBT可获取的剖面深度可达450米或760米，特殊定制仪器则可实现1830米深度的测量。