Physical data from CTD and bottle casts from the R/V ALPHA HELIX in the Gulf of Alaska by the University of Alaska; Institute of Marine Science (UAK/IMS) in support of the Exxon Oil Spill Monitoring Program and the Gulf of Alaska Recirculation Project from 1989-05-05 to 1989-05-28 (NODC Accession 8

Temperature, salinity, and sigma-t profiles from CTD and bottle casts from the R/V ALPHA HELIX. Data were collected in the Gulf of Alaska by the University of Alaska; Institute of Marine Science (UAK/IMS) from 05 May 1989 to 28 May 1989. Data were collected in support of the Exxon Oil Spill Monitoring Program funded by the State of Alaska and the Gulf of Alaska Recirculation Project funded by the National Science Foundation, Grant #OCE8608125. Data were processed by NODC to the NODC standard F022 High-Resolution CTD/STD Output Format. Full format description is available from NODC at www.nodc.noaa.gov/General/NODC-Archive/f022.html.

The F022 format contains high-resolution data collected using CTD (conductivity-temperature-depth) and STD (salinity-temperature-depth) instruments. As they are lowered and raised in the oceans, these electronic devices provide nearly continuous profiles of temperature, salinity, and other parameters. Data values may be subject to averaging or filtering or obtained by interpolation and may be reported at depth intervals as fine as 1m. Cruise and instrument information, position, date, time and sampling interval are reported for each station. Environmental data at the time of the cast (meteorological and sea surface conditions) may also be reported. The data record comprises values of temperature, salinity or conductivity, density (computed sigma-t), and possibly dissolved oxygen or transmissivity at specified depth or pressure levels. Data may be reported at either equally or unequally spaced depth or pressure intervals. A text record is available for comments.

本数据集包含由ALPHA HELIX号科考船（R/V ALPHA HELIX）通过CTD（电导率-温度-深度仪）与采水瓶采集的温度、盐度及sigma-t（密度距平）剖面数据。数据由阿拉斯加大学海洋科学研究所（UAK/IMS）于1989年5月5日至1989年5月28日在阿拉斯加湾采集。本次数据采集工作得到阿拉斯加州资助的埃克森石油泄漏监测计划，以及美国国家科学基金会资助的阿拉斯加湾环流项目（项目编号：OCE8608125）支持。数据已由美国国家海洋数据中心（NODC）按照NODC标准F022高分辨率CTD/STD输出格式完成标准化处理。完整格式说明可通过NODC官方网站www.nodc.noaa.gov/General/NODC-Archive/f022.html查阅。

F022格式存储了使用CTD与STD（盐度-温度-深度仪）采集的高分辨率海洋观测数据。这类电子设备在海洋中布放并回收的过程中，可连续获取温度、盐度及其他环境参数的剖面观测序列。数据值可经过平均、滤波或插值处理，以最小1米的精细深度间隔进行报告。每个测站均记录有航次与仪器相关信息、站位地理坐标、观测日期、时间及采样间隔。此外，数据集还可能包含采样当时的环境参数数据，包括气象及海表状况。数据记录涵盖指定深度或压力层位下的温度、盐度/电导率、密度（计算得到的sigma-t），以及可选的溶解氧或透射率数据。数据可按等间距或不等间距的深度/压力间隔进行输出。数据集附带文本记录用于备注说明。