Cloud amount/frequency, NITRATE and other data from ALPHA HELIX in the Chukchi Sea from 1989-09-02 to 1989-09-23 (NCEI Accession 8900284)

Data has been processed by NODC to the NODC standard High-Resolution CTD/STD (F022) format.

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.

该数据集已由国家海洋数据中心（NODC）按照NODC标准的高分辨率CTD/STD（F022）格式进行处理。F022格式包含了利用CTD（电导率-温度-深度）和STD（盐度-温度-深度）仪器收集的高分辨率数据。这些电子设备在海洋中上下移动时，能够提供温度、盐度及其他参数的近乎连续的剖面。数据值可能经过平均、滤波或通过插值获得，并可能以1米为间隔的深度进行报告。每个测站均报告了巡航和仪器信息、位置、日期、时间及采样间隔。同时，投放时的环境数据（气象和海面条件）也可能被报告。数据记录包括温度、盐度或电导率、密度（计算得到的sigma-t）以及在指定深度或压力水平处的溶解氧或透射率的值。数据可能以等距或不等距的深度或压力间隔进行报告。此外，还提供了一段文本记录以供注释。