Temperature profiles from MBT casts from the PONTCHARTRAIN from Ocean Weather Station N (OWS-N) in the North Pacific Ocean from 26 August 1969 to 11 September 1969 (NODC Accession 6900731)

Bathythermograph data were collected from the PONTCHARTRAIN within a 1-mile radius of Ocean Weather Station N (3000N 14000W) and in transit. Data were collected by the United States Coast Guard from 26 August 1969 to 11 September 1969. The platform was 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.

本数据集为海水温度深度记录仪（Bathythermograph）观测数据，采集自“庞恰特雷恩”号作业区域，涵盖N号海洋气象站（北纬30°00′，西经140°00′）周边1英里半径范围及航行途中的观测数据。美国海岸警卫队于1969年8月26日至1969年9月11日完成数据收集工作。该观测平台配备专业设备并配有操作人员，用于开展气象与海况观测。数据由国家海洋数据中心（National Oceanographic Data Center, NODC）处理为符合NODC标准的通用海水温度深度记录仪输出（Universal Bathythermograph Output, UBT）格式。完整的格式说明可通过NODC官方网址获取：www.nodc.noaa.gov/General/NODC-Archive/bt.html。

UBT文件格式用于存储通过机械式海水温度深度记录仪（Mechanical Bathythermograph, MBT）获取的温度-深度剖面数据。MBT观测的最大探测深度约为285米，因此该类数据仅适用于海洋上层热结构的相关研究。每条观测记录均包含航次信息、观测日期、位置与时间。数据记录由温度-深度值对组成，本文件中的温度数据以5米的等深度间隔进行存储。