RV ENDEAVOUR 08/2007 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英国海洋科学中心（CEFAS，或称DFR）的研究远航。这些数据广泛覆盖了欧洲大陆架，并包含部分伊比利亚海盆的数据。数据采集采用降低式CTD罗塞特系统，该系统在船舶静止时使用。通常在特定深度释放瓶盖，以采集用于校准的样本。在早期年份，仅收集有限参数，特别是压力（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。在随后的年份中，增加了更多传感器，包括荧光计、光学后向散射仪或透射仪以及光照（包括光合有效辐射）。具体的配置在不同航次之间有所差异，这在输出文件的数据格式中得到了体现。数据是在航站研究船舶上采集的，从海面到近海底的剖面图被绘制。在上升过程中，投放水样瓶进行样本采集和校准。