Temperature profiles from XBT casts from the EVERGREEN and other platforms as part of the Marine Resources Monitoring, Assessment and Prediction (MARMAP) project from 12 August 1978 to 25 November 1978 (NODC Accession 7800887)

Temperature profiles were collected from XBT casts from the EVERGREEN and other platforms from 12 August 1978 to 25 November 1978. Data were collected by the National Marine Fisheries Service (NMFS) and other institutions 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 450 m or 760 m. Special instruments permitted measurements to 1830 m.1978年8月12日至1978年11月25日期间，采集自EVERGREEN号及其他平台的投弃式温深仪（expendable bathythermograph，XBT）剖面观测数据。本次数据由美国国家海洋渔业局（National Marine Fisheries Service，NMFS）及其他机构作为海洋资源监测、评估与预测（Marine Resources Monitoring, Assessment and Prediction，MARMAP）项目的一部分采集获取。数据由美国国家海洋数据中心（National Oceanographic Data Center，NODC）处理为NODC标准通用温深仪输出（Universal bathythermograph Output，UBT）格式。完整的格式说明可从NODC官网获取，网址为：www.nodc.noaa.gov/General/NODC-Archive/bt.html。 UBT格式包含通过XBT仪器采集得到的温深剖面数据。每份观测记录均包含航次信息、观测位置、日期与时间。数据记录由温深值对构成。XBT数据文件中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XBT可获取最大深度达450米或760米的剖面数据。特殊定制仪器则可实现最大深度达1830米的测量。