Temperature profiles from mechanical bathythermograph (MBT) casts from the USS ALACRITY and Other Platforms in the North Pacific Ocean and other locations in support of the Fleet Observations of Oceanographic Data (FLOOD) project from 16 March 1961 to 05 February 1968 (NODC Accession 6900577)

MBT data were collected from the USS ALACRITY and Other Platforms in support of the Fleet Observations of Oceanographic Data (FLOOD) project. Data were collected by US Navy; Ships of Opportunity and other institutions from 16 March 1961 to 05 February 1968. Platforms were equipped and staffed to observe weather and sea conditions. Data were processed by NODC to the NODC standard Universal Bathythermograph Output (UBT) format. Full format description is available from NODC at www.nodc.noaa.gov/General/NODC-Archive/bt.html.

The UBT file format is used for temperature-depth profile data obtained using the mechanical bathythermograph (MBT) instrument. The maximum depth of MBT observations is approximately 285 m. Therefore, MBT data are useful only in studying the thermal structure of the upper layers of the ocean. Cruise information, date, position, and time are reported for each observation. The data record comprises pairs of temperature-depth values. Temperature data in this file are recorded at uniform 5 m depth intervals.

机械深度温度计（Mechanical Bathythermograph, MBT）数据采集自美国海军“敏捷号”（USS ALACRITY）及其他观测平台，以支撑海洋数据舰队观测（Fleet Observations of Oceanographic Data, FLOOD）项目。该数据集由美国海军、机遇观测舰（Ships of Opportunity）及其他机构于1961年3月16日至1968年2月5日期间采集。所有观测平台均配备专用设备并安排专业人员开展气象与海况监测。美国国家海洋数据中心（National Oceanographic Data Center, NODC）已将原始数据处理为符合NODC标准的通用深度温度计输出（Universal Bathythermograph Output, UBT）格式。完整格式说明可通过NODC官网www.nodc.noaa.gov/General/NODC-Archive/bt.html查询获取。
UBT文件格式专用于记录通过机械深度温度计（MBT）获取的温深剖面数据。该仪器的最大观测深度约为285米，因此MBT数据仅适用于研究海洋上层的热结构特征。每次观测均会记录航次信息、观测日期、地理位置与时间信息。数据记录由多组温深数值对构成。本文件中的温度数据以5米为均匀深度间隔进行记录。