RV ENDEAVOUR 15/2008 Low 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.

本档案中所收集的数据源自于 CEFAS（或 DFR）的研究远征。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。数据采集采用下放式CTD罗盘系统，该系统在船舶静止时使用。通常在特定深度投放瓶体，以采集用于校准的样本。在早期年份，仅收集了有限的一组参数，其中尤为重要的是压力（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，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）。具体的配置在不同航次之间有所差异，并在输出文件的数据格式中得到体现。数据采集自研究船在站点的作业，从海面至近海底进行剖面调查。下放式数据应呈现为干净的剖面，而上浮时投放的水瓶用于样本采集和校准。