Temperature profile data collected using XBTs from the HIEI MARU from the Pacific Ocean during the Thermal Structure Monitoring Program in the Pacific (TRANSPAC) project, 29 July 1977 to 06 August 1977 (NODC Accession 8100177)

Temperature profile data were collected using bathythermograph (BT/XBT) casts from HIEI MARU in the Pacific Ocean from July 29, 1977 to August 6, 1977. 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.1977年7月29日至8月6日，科研船“比睿丸”（HIEI MARU）于太平洋海域通过深温计（bathythermograph, BT/XBT）投测作业采集温度剖面数据。该数据由斯克里普斯海洋研究所（Scripps Institution of Oceanography）作为太平洋热结构监测计划（TRANSPAC）项目的一部分提交。美国国家海洋数据中心（NODC）已将数据处理为符合其标准的通用深温计输出（Universal Bathythermograph Output, UBT）格式。有关深温计的完整说明可访问：http://www.nodc.noaa.gov/General/NODC-Archive/bt.html。 通用深温计输出（UBT）格式包含通过投弃式深温计（expendable bathythermograph, XBT）仪器获取的温度-深度剖面数据。每份观测记录均记载航次信息、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深温计（Mechanical Bathythermograph, MBT）数据文件不同，投弃式深温计数据文件中的温度值对应非均匀深度，这些深度以精准刻画温度曲线所需的最少测点（即“拐点”）进行记录。标准投弃式深温计可获取的剖面最大深度为450米或760米；若配备专用仪器，测量深度可达1830米。