Temperature profiles from XBT casts from the MARINE EVANGELINE and other platforms as part of the Marine Resources Monitoring, Assessment and Prediction (MARMAP) project from 30 January 1979 to 22 February 1979 (NODC Accession 7900111)

Temperature profiles were collected from XBT casts from the MARINE EVANGELINE and other platforms from 30 January 1979 to 22 February 1979. Data were collected by the National Marine Fisheries Service (NMFS) 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.

本数据集的温度廓线数据采集于1979年1月30日至2月22日期间，源自“海洋福音号”（MARINE EVANGELINE）及其他观测平台开展的投弃式温深仪（expendable bathythermograph, XBT）投放测次作业。数据由国家海洋渔业局（National Marine Fisheries Service, NMFS）作为海洋资源监测、评估与预报（Marine Resources Monitoring, Assessment and Prediction, MARMAP）项目的组成部分完成采集。美国国家海洋数据中心（National Oceanographic Data Center, NODC）将所有数据处理为符合NODC标准的通用温深仪输出（Universal Bathythermograph Output, UBT）格式。完整的格式说明可通过NODC官网的下述链接查阅：www.nodc.noaa.gov/General/NODC-Archive/bt.html。

UBT格式存储了通过投弃式温深仪（XBT）获取的温深廓线数据。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探测深度，仅记录了精准刻画温度曲线所需的最少数量的拐点（inflection points）。标准XBT的最大探测深度为450米或760米，特殊型号的XBT则可实现1830米深度的探测。