RV CORYSTES 2C/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 Abysal
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.

本数据集所收录的数据源自于欧洲渔业和水产科学中心（简称 CEFAS 或 DFR）的研究航次。该数据集广泛涵盖了欧洲大陆架，并包含伊比利亚海盆的部分数据。数据采集采用了降低式温盐深（CTD）浮标系统，该系统适用于船只静止时使用。通常，在特定深度释放瓶体以采集样本进行校准。在早期年份，仅收集了有限参数，包括压力（深度）、温度和电导率（CTD）。通过电导率，可利用联合国教科文组织1978年和1983年的公式计算盐度。随后的年份中，增加了更多传感器，尤其是荧光计、光学后向散射或透射计以及光（如光合有效辐射）。具体的配置因航次而异，并在输出文件的数据格式中得到了体现。数据采集自驻站的研究船只，从海面至近海底的剖面数据被采集。下投式数据应呈现为纯净的剖面，而用于样本采集和校准的水瓶则在上投式时释放。