Physical, meteorological, and other data from surface sensors, bottle casts, and CTD casts from the ALPHA HELIX as part of the Outer Continental Shelf Environmental Assessment Program (OCSEAP) from 10 September 1987 to 15 December 1987 (NODC Accession 8800043)

Physical, meteorological, and other data were collected from surface sensors, bottle casts, and CTD casts from the ALPHA HELIX from 10 September 1987 to 15 December 1987. Data were collected by the University of Alaska - Fairbanks; Institute of Marine Science (UAK/IMS) as part of Outer Continental Shelf Environmental Assessment Program (OCSEAP). 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. An analog file for this accession is available from NODC user services.

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.

1987年9月10日至1987年12月15日期间，科考船ALPHA HELIX（阿尔法螺旋号）通过水面传感器、采水器站位与CTD（conductivity-temperature-depth，电导率-温度-深度仪）站位采集了物理、气象及其他相关数据。该数据由阿拉斯加大学费尔班克斯分校海洋科学研究所（University of Alaska Fairbanks, Institute of Marine Science，UAK/IMS）作为外大陆架环境评估计划（Outer Continental Shelf Environmental Assessment Program，OCSEAP）的一部分收集。数据由美国国家海洋数据中心（National Oceanographic Data Center，NODC）处理为NODC标准F022高分辨率CTD/STD输出格式。完整格式说明可从NODC官网www.nodc.noaa.gov/General/NODC-Archive/f022.html获取。本批次数据的模拟文件可通过NODC用户服务获取。

F022格式涵盖了采用CTD与STD（salinity-temperature-depth，盐度-温度-深度仪）采集的高分辨率数据。此类电子设备在海洋中布放并回收的过程中，可获取温度、盐度及其他参数的准连续剖面数据。数据值可经过平均、滤波处理或通过插值得到，且可按最精细1米的深度间隔进行记录。每个站位均记录有航次与仪器信息、站位坐标、日期、时间及采样间隔。站位作业时的环境数据（气象与海表状况）亦可一并记录。数据记录包含指定深度或压力层级下的温度、盐度或电导率、密度（计算得到的sigma-t，即密度距平）值，以及可能存在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/压力间隔进行记录。可通过文本记录附加注释。