Temperature profile data collected using XBTs from the PRESIDENT JEFFERSON from the Pacific Ocean during the Thermal Structure Monitoring Program in the Pacific (TRANSPAC) project, 01 October 1976 to 08 October 1976 (NODC Accession 8100171)

Temperature profile data were collected using bathythermograph (BT/XBT) casts from PRESIDENT JEFFERSON in the Pacific Ocean from October 1, 1976 to October 8, 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10月1日至10月8日期间，在太平洋海域由“杰斐逊总统号”（PRESIDENT JEFFERSON）开展的探温仪（bathythermograph, BT/XBT）投放作业。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（Thermal Structure Monitoring Program in the Pacific, TRANSPAC）项目的组成部分提交。美国国家海洋数据中心（National Oceanographic Data Center, NODC）已将这批数据处理为符合NODC标准的通用探温仪输出（Universal Bathythermograph Output, UBT）格式。完整的探温仪说明文档可通过以下链接获取：http://www.nodc.noaa.gov/General/NODC-Archive/bt.html。 UBT格式存储了使用一次性探温仪（expendable bathythermograph, 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。与以5米等间隔记录温度值的机械探温仪（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，此类深度仅记录了精准刻画温度曲线所需的最少数量的点（即“拐点”，inflection points）。标准XBT可获取深度达450米或760米的温度剖面；使用专用仪器时，测量深度可达1830米。