Temperature profile data collected using XBTs from the LEXA MAERSK and other platforms from the Pacific Ocean during the Thermal Structure Monitoring Program in the Pacific (TRANSPAC) project, 1988-08-30 to 1989-05-30 (NODC Accession 8900187)

Temperature profile data were collected using bathythermograph (BT/XBT) casts from LEXA MAERSK and other platforms in the Pacific Ocean from August 30, 1988 to May 30, 1989. 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.1988年8月30日至1989年5月30日期间，研究人员依托LEXA MAERSK号及其他平台开展的温深仪（bathythermograph, BT/XBT）观测作业，采集了太平洋海域的温度剖面数据。该数据集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）项目的组成部分。美国国家海洋数据中心（National Oceanographic Data Center, NODC）将原始数据处理为符合其标准的通用温深仪输出（Universal Bathythermograph Output, UBT）格式。完整的温深仪相关技术说明可通过以下网址查阅：http://www.nodc.noaa.gov/General/NODC-Archive/bt.html。 UBT格式存储了通过投弃式温深仪（expendable bathythermograph, XBT）获取的温度-深度剖面数据。每份观测记录均包含航次信息、观测位置、观测日期与时间，数据记录由多组温度-深度数值对构成。与以5米等间隔记录温度值的机械式温深仪（Mechanical Bathythermograph, MBT）数据文件不同，XBT数据集的温度值对应非均匀分布的深度。这些深度以精准刻画温度曲线所需的最少测点数量（即“拐点”）进行记录。标准型投弃式温深仪可获取的剖面最大深度为450米或760米；若配备专用仪器，则可将测量深度拓展至1830米。