RV CIROLANA 07/1996 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）科研航次。这些数据广泛覆盖了欧洲大陆架，并包含伊比利亚海盆的一些数据。数据采集采用下放式CTD浮标系统，该系统适用于船舶静止时使用。通常在特定深度释放瓶体以采集样本进行校准。早期年份仅收集了有限的参数，其中尤为突出的为压力（深度）、温度和电导率（CTD）。通过电导率，可根据UNESCO 1978、1983年的公式计算出盐度。在随后的年份中，增添了更多传感器，包括荧光计、光学后向散射或透射计以及光（叶绿素荧光、光合有效辐射）。具体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。科研航次中的数据采集自固定站点的研究船舶，进行从海面至近海底的剖面采集。下放式数据应呈现为清洁的剖面。用于样本采集和校准的水瓶在上升过程中被释放。