Temperature profile data collected using XBTs from the SEATRAIN PRINCETON from the Pacific Ocean during the Thermal Structure Monitoring Program in the Pacific (TRANSPAC) project, 06 March 1977 to 15 March 1977 (NODC Accession 8100122)

Temperature, depth, and other data were collected using bathythermograph (BT/XBT) casts from SEATRAIN PRINCETON in the Pacific Ocean from March 6, 1977 to March 15, 1977. Data were submitted by Scripps Institution of Oceanography in 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3月6日至3月15日，“SEATRAIN PRINCETON”号科考船于太平洋海域开展温深仪（bathythermograph，BT/XBT）站位观测，采集海水温度、深度及相关数据。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（Thermal Structure Monitoring Program in the Pacific，TRANSPAC）项目的一部分。美国国家海洋数据中心（National Oceanographic Data Center，NODC）已将该数据处理为符合NODC标准的通用温深仪输出（Universal Bathythermograph Output，UBT）格式。完整的温深仪相关说明可通过http://www.nodc.noaa.gov/General/NODC-Archive/bt.html查阅获取。 UBT格式包含通过投弃式温深仪（expendable bathythermograph，XBT）设备获取的温度-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-深度值对组成。与以均匀5米间隔记录温度值的MBT数据文件不同，XBT数据文件中的温度值对应非均匀深度。这些深度以精准刻画温度曲线所需的最少点数——即“拐点（inflection points）”进行记录。标准XBT设备可获取深度达450米或760米的剖面数据；使用专用仪器时，测量深度可达1830米。