Temperature profiles from XBT casts from the OLEANDER as part of the Marine Resources Monitoring, Assessment and Prediction (MARMAP) project from 13 August 1981 to 14 August 1981 (NODC Accession 8100625)

Temperature profiles were collected from XBT casts from the OLEANDER from 13 August 1981 to 14 August 1981. Data were collected by the National Marine Fisheries Service (NMFS) as part of the Marine Resources Monitoring, Assessment and Prediction (MARMAP) project. 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 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 records are comprised of pairs of temperature-depth values. The XBT data files contain 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. Special instruments permitted measurements to be obtained to 1830 m.1981年8月13日至8月14日期间，研究人员通过“奥利安德”号（OLEANDER）开展的投弃式温深仪（expendable Bathythermograph，XBT）投放作业，获取了海洋温度剖面数据。该数据由美国国家海洋渔业局（National Marine Fisheries Service，NMFS）作为海洋资源监测、评估与预测（Marine Resources Monitoring, Assessment and Prediction，MARMAP）项目的组成部分采集，后由国家海洋数据中心（National Oceanographic Data Center，NODC）处理为符合NODC标准的通用温深仪输出（Universal Bathythermograph Output，UBT）格式。完整格式说明可通过NODC官方网站www.nodc.noaa.gov/General/NODC-Archive/bt.html查阅。 UBT格式存储了通过投弃式温深仪（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、站位坐标、观测日期与时间。数据记录由温度与深度的数值对构成。XBT数据文件中的温度值对应非均匀分布的深度测点，这些测点仅选取精准刻画温度曲线所需的最少数量，即“拐点（inflection points）”。标准型XBT可获取的剖面最大深度为450米或760米，特殊型号仪器则支持1830米深度的测量。