Temperature profiles from XBT casts in the Arctic Ocean and other locations from the MILLER FREEMAN in support of the Outer Continental Shelf Environmental Assessment Program (OCSEAP) from 26 April 1976 to 12 May 1976 (NODC Accession 7601159)

Temperature profiles were collected from XBT casts in Arctic Ocean and other locations from the MILLER FREEMAN. Data were collected by the National Ocean Service - Seattle (NOS) in support of the Outer Continental Shelf Environmental Assessment Program (OCSEAP) from 26 April 1976 to 12 May 1976. 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 permit measurements to be obtained to 1830 m.

本数据集的温度剖面数据采集自"MILLER FREEMAN"号科考船在北冰洋及其他海域开展的抛弃式温深仪（expendable bathythermograph，XBT）投放观测。数据由美国国家海洋服务局西雅图分局（National Ocean Service - Seattle，NOS）于1976年4月26日至1976年5月12日期间采集，旨在支撑外大陆架环境评估计划（Outer Continental Shelf Environmental Assessment Program，OCSEAP）。数据经美国国家海洋数据中心（National Oceanographic Data Center，NODC）处理，转换为NODC标准通用温深仪输出（UBT，Universal Bathythermograph Output）格式。完整格式说明可通过NODC官网www.nodc.noaa.gov/General/NODC-Archive/bt.html 获取。

UBT格式存储了通过抛弃式温深仪（XBT，expendable bathythermograph）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、日期及时间。数据记录由温度-深度值对组成。XBT数据文件中的温度值对应非均匀分布的深度测点，这些测点为精准刻画温度曲线所需的最少拐点（inflection points）数量。标准型XBT可获取的剖面最大深度为450米或760米，特殊型号仪器则可实现1830米深度的测量。