Temperature profile data collected using XBTs from the JAPAN ACE from the Pacific Ocean during the Thermal Structure Monitoring Program in the Pacific (TRANSPAC) project, 25 May 1977 to 03 June 1977 (NODC Accession 8100255)

Temperature profile data were collected using bathythermograph (BT/XBT) casts from JAPAN ACE in the Pacific Ocean from May 25, 1977 to June 03, 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5月25日至6月3日期间，于太平洋海域依托日本ACE号科考船的投弃式温深仪（bathythermograph, BT/XBT）观测站位，获取了温度剖面数据。本次数据由斯克里普斯海洋研究所提交，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）将数据处理为符合NODC标准的通用温深仪输出（Universal Bathythermograph Output, UBT）格式。温深仪的完整说明可访问以下网址：http://www.nodc.noaa.gov/General/NODC-Archive/bt.html。 通用温深仪输出（UBT）格式包含通过投弃式温深仪（expendable bathythermograph, XBT）获取的温深剖面数据。每条观测记录均附带航次信息、观测位置、日期与时间，数据记录由多组温深值对构成。与机械温深仪（MBT）数据文件不同——后者以均匀5米间隔记录温度值，XBT数据文件中的温度值对应非均匀深度。这些深度以准确刻画温度曲线所需的最少测点数量（即“拐点”）进行记录。标准XBT设备可获取的剖面最大深度为450米或760米，搭配专用仪器时，测量深度可达1830米。