Temperature profiles from XBT casts in the NE Pacific (limit-180) from the SURVEYOR as part of the Outer Continental Shelf Environmental Assessment Program (OCSEAP) from 09 March 1976 to 25 June 1976 (NODC Accession 7601426)

Temperature profiles were collected from XBT casts in NE Pacific (limit-180) from the SURVEYOR. Data were collected by the National Ocean Service - Seattle (NOS) as part of the Outer Continental Shelf Environmental Assessment Program (OCSEAP) from 09 March 1976 to 25 June 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源自“勘探者号”（SURVEYOR）科考船在东北太平洋（范围限定为西经180°以东海域）开展的抛弃式温深计（expendable bathythermograph, XBT）投放观测。数据由美国国家海洋服务局西雅图分部（National Ocean Service - Seattle, NOS）于1976年3月9日至1976年6月25日期间，作为外大陆架环境评估计划（Outer Continental Shelf Environmental Assessment Program, OCSEAP）的一部分采集完成。美国国家海洋数据中心（National Oceanographic Data Center, NODC）已将该数据处理为NODC标准通用温深计输出（Universal Bathythermograph Output, UBT）格式。完整的格式说明可从NODC官网获取，链接为：www.nodc.noaa.gov/General/NODC-Archive/bt.html。

UBT格式存储了使用XBT仪器获取的温度-深度剖面数据。每条观测记录均包含航次信息、观测位置、观测日期与时间。数据记录由成对的温度-深度数值构成。本数据集的XBT数据文件中，温度对应的观测深度并非均匀分布，而是仅记录了精准刻画温度曲线所需的最少测点，即“拐点”。标准XBT仪器可获取的最大观测深度为450米或760米，特殊定制仪器则可实现1830米深度的测量。