Current components, physical, and other data from moored current meters and CTD casts from the ALPHA HELIX and other platforms from Gulf of Alaska from 1988-04-28 to 1988-06-29 (NODC Accession 8800237)

Current components, physical, and other data were collected by moored current meters and CTD casts in the Gulf of Alaska from the ALPHA HELIX and other platforms. Data were collected by the University of Alaska - Fairbanks; Institute of Marine Science (UAK/IMS) from 28 April 1988 to 29 June 1988. Data has been processed by NODC to the standard NODC F015-Current Meter Data (Components) and the F022-CTD High Resolutions formats. Full format descriptions are available from NODC homepage at http://www.noaa.nodc.gov/. This F015 format is used for time series measurements of ocean currents. These data are obtained from current meter moorings and represent Eulerian method of current measurement, i.e., the meters are deployed at a fixed point and measure flow past a sensor. Position, bottom depth, sensor depth, and meter characteristics are reported for each station. The data record comprises values of east-west (u) and north-south (v) current vector components at specified date and time. Current direction is defined as the direction toward which the water is flowing with positive directions east and north and negative directions west and south. Data values may be subject to averaging or filtering and are typically reported at 10-15 minute time intervals. Water temperature, pressure, and conductivity or salinity may also be reported. A text record is available for optional comments. 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.本数据集的海流分量、物理特性及其他相关数据，由阿拉斯加湾海域的ALPHA HELIX号及其他观测平台，通过锚定海流计与CTD（Conductivity-Temperature-Depth，温盐深仪）剖面观测方式采集得到。该数据由阿拉斯加大学费尔班克斯分校海洋科学研究所（UAK/IMS）于1988年4月28日至1988年6月29日期间采集。美国国家海洋数据中心（NODC，National Oceanographic Data Center）已将数据处理为标准的NODC F015-海流计数据（分量）格式与F022-CTD高分辨率格式。完整格式说明可从NODC官网http://www.noaa.nodc.gov/查询获取。 F015格式用于海洋海流的时间序列观测。此类数据源自锚定海流计的观测结果，采用欧拉海流测量方法：将海流计部署于固定点位，监测流经传感器的水体流动。每个测站均记录有站位位置、海底深度、传感器布设深度及海流计参数信息。数据记录包含指定日期与时刻下的东西向（u）与南北向（v）海流矢量分量。海流方向定义为水体流动的指向，东向与北向为正方向，西向与南向为负方向。数据值可能经过平均或滤波处理，通常以10至15分钟的时间间隔进行输出记录。此外，还可同步记录水体温度、压力、电导率或盐度数据。附带文本记录可用于填写可选备注信息。 F022格式包含采用CTD（Conductivity-Temperature-Depth，电导率-温度-深度仪）与STD（Salinity-Temperature-Depth，盐度-温度-深度仪）仪器采集的高分辨率数据。此类电子设备在海洋中升降作业时，可获取温度、盐度及其他参数的近乎连续的剖面数据。数据值可能经过平均、滤波处理或通过插值得到，最小可按1米的深度间隔进行记录。每个测站均记录有航次与仪器信息、站位位置、日期、时间及采样间隔。还可记录剖面观测时的环境数据（气象与海面状况）。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），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或压力间隔进行记录。附带文本记录可用于填写备注信息。