Temperature profile data collected using XBTs from the PRESIDENT VAN BUREN from the Pacific Ocean during the Thermal Structure Monitoring Program in the Pacific (TRANSPAC) project, 10 December 1976 to 19 December 1976 (NODC Accession 8100231)

Temperature profile data were collected using bathythermograph (BT/XBT) casts from PRESIDENT VAN BUREN in the Pacific Ocean from December 10, 1976 to December 19, 1976. Data were submitted by Scripps Institution of Oceanography as part of the Thermal Structure Monitoring Program in the Pacific (TRANSPAC) project. Data were processed by NODC to the NODC standard Universal Bathythermograph Output (UBT) format. Full BT descriptions are available at http://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 record was comprised of pairs of temperature-depth values. Unlike the MBT Data File, in which temperature values were recorded at uniform 5 m intervals, the XBT data files contained 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. With special instruments, measurements can be obtained to 1830 m.本数据集的温度剖面数据采集自1976年12月10日至12月19日期间，由“范布伦总统号”（PRESIDENT VAN BUREN）科考船在太平洋海域开展的温深仪（bathythermograph, BT/XBT）投放作业获取。数据由斯克里普斯海洋研究所（Scripps Institution of Oceanography）提交，作为太平洋热结构监测计划（TRANSPAC项目）的组成部分。美国国家海洋数据中心（National Oceanographic Data Center, NODC）已将该数据处理为NODC标准通用温深仪输出（Universal Bathythermograph Output, UBT）格式。完整的温深仪相关说明可通过以下链接获取：http://www.nodc.noaa.gov/General/NODC-Archive/bt.html。 UBT格式包含通过投弃式温深仪（expendable bathythermograph, XBT）获取的温度-深度剖面数据。每条观测记录均附带航次信息、观测位置、日期与时间。数据记录由温度-深度值对构成。与以均匀5米间隔记录温度值的机械式温深仪（Mechanical Bathythermograph, MBT）数据文件不同，XBT数据文件中的温度值对应非均匀深度。这些深度点为精准刻画温度曲线所需的最少数量点，即“拐点（inflection points）”。标准型XBT可获取的剖面最大深度为450米或760米，若使用专用仪器，测量深度可达1830米。