RV CIROLANA 02/1993 Low Resolution Conductivity-Temperature-Depth (CTD) Data

The data in this archive was collected from CEFAS (Or DFR) research surveys.
It broadly covers the European Shelf with some data from the Iberian Abyssal
Plain. Data was 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.

本档案中所收录的数据源自于 CEFAS（或 DFR）的研究调查。该数据集广泛涵盖了欧洲大陆架，并包含伊比利亚海底平原的部分数据。数据采集采用下沉式 CTD 罗斯贝采水系统，该系统适用于船舶静止状态。通常在特定深度释放瓶装水，以获取校准样本。在早期年份，仅收集了有限的参数，其中特别包括压力（深度）、温度和电导率（CTD）。通过电导率，可根据联合国教科文组织1978年、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（叶绿素荧光、光合有效辐射）。具体的配置因航次而异，这在输出文件的格式中得到了体现。数据采集自处于站位的科研船舶，进行自表面至近海底的剖面观测。下投式数据应呈现为干净的剖面，而用于样本收集和校准的水瓶则在上投时释放。