RV ENDEAVOUR 17/2007 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 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.

本数据集的资料收集自 CEFAS（或 DFR）的科研航次。数据范围广泛，涵盖了欧洲大陆架，并包括伊比利亚深渊平原的部分数据。收集数据时采用了降下式 CTD 花环系统，该系统适用于船舶静止状态。通常在特定深度处释放瓶体，以采集用于校准的样本。在早期年份，仅收集了有限的参数，包括压力（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。随后年份中，增加了更多传感器，特别是荧光计、光学后向散射仪或透射仪以及光（叶绿素活性辐射）。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。数据收集于科研船在指定位置的航次，从海面至近海底进行剖面测量，下投数据应呈现清晰剖面。用于样本采集和校准的水瓶在上投过程中释放。