RV CORYSTES 09/1993 High Resolution Conductivity-Temperature-Depth (CTD) Data

The data in this archive were collected from CEFAS (Or DFR) research cruises.
They broadly cover the European Shelf with some data from the Iberian Abyssal
Plain. Data were collected using the lowered CTD rosette system which is used
when the vessel is stationary. Usually bottles were fired at particular depths
and samples taken for calibration. In early years only a limited set of
parameters were collected. Notably Pressure (Depth), Temperature and
Conductivity (CTD). From Conductivity Salinity can be calculated using the
UNESCO 1978,1983 formulations . In subsequent years more sensors have been
added, notably fluorometers, Optical back scatter or transmissometers and
Light (PAR, photo synthetically available radiation). The exact configuration
varies between cruises and this is reflected in the data format of the output
files.

Data was collected from research vessels on station, a profile from the
surface to near the sea bed is undertaken. The down cast data should be a
clean profile. Water bottles for sample collection and calibration are fired
on the up cast.

本档案中的数据来源于 CEFAS（或 DFR）科研航次。这些数据广泛覆盖了欧洲大陆架，并包含伊比利亚海盆的部分数据。数据采集采用了降低式 CTD 花环系统，该系统适用于船舶静止状态下的测量。通常，在特定深度处发射瓶体以采集样本，并进行校准。在早期年份，仅收集了有限参数，尤其是压力（深度）、温度和电导率（CTD）。通过电导率，可利用 UNESCO 1978 年和 1983 年的公式计算出盐度。随后年份，增加了更多传感器，包括荧光计、光学后向散射或透射计以及光（光合有效辐射）。具体的配置因航次而异，并在输出文件的数据格式中得到体现。科研航次中的数据采集来自站位的科研船舶，从海面至近海底进行剖面调查。下降过程中的数据应呈现干净剖面，而上浮过程中则使用水样瓶进行样本采集和校准。