RV CORYSTES 11/1999 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.

本数据集的资料源自于 CEFAS（或 DFR）的研究巡航活动。其范围广泛，涵盖了欧洲大陆架，并包含伊比利亚海盆的部分数据。数据采集采用降低式 CTD 玫瑰系统，该系统在船舶静止时使用。通常在特定深度释放瓶体，以采集用于校准的样本。在早期年份，仅收集了有限的参数，其中值得注意的是压力（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。在随后的年份中，添加了更多的传感器，特别是荧光计、光学后向散射或透射仪以及光（PAR，光合有效辐射）。具体的配置因巡航而异，这在输出文件的格式中得到了体现。在站点的科考船上采集数据时，进行的剖面测量从海面至近海底。下投数据应呈现为干净的剖面，而上投时则使用水样瓶进行样本采集和校准。