RV CORYSTES 02/2001 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.

本档案中的数据源自于 CEFAS（或 DFR）的研究巡航活动。数据广泛覆盖了欧洲大陆架，并包含伊比利亚海底平原的部分数据。收集数据时采用了降低式CTD（温盐深）浮标系统，该系统适用于船舶静止状态。通常在特定深度释放水样瓶，以进行校准采样。在早期年份，仅收集了有限的一组参数，特别是压力（深度）、温度和电导率（CTD）。通过电导率，可以运用 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，包括荧光计、光学后向散射或透射计以及光照（包括光合有效辐射）。具体的配置因巡航而异，并在输出文件的数据格式中得到了体现。数据收集自固定站点的科研船只，从海面至近海底进行剖面观测。下沉数据应形成干净的剖面，而用于采样和校准的水样瓶则在上升过程中释放。