RV CIROLANA 7B/1993 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.

本数据集的资料来源于 CEFAS（或 DFR）科研航次。其数据范围广泛，涵盖了欧洲大陆架，并包含伊比利亚深渊平原的部分数据。资料收集采用降低式CTD罗塞特系统，该系统适用于船舶静止状态。通常在特定深度投放水样瓶进行采样，以进行校准。在早期年份，仅收集了有限参数，特别是压力（深度）、温度和电导率（CTD）。通过电导率可利用 UNESCO 1978、1983 公式计算盐度。在随后的年份中，增加了更多传感器，特别是荧光计、光学后向散射或透射计以及光（如叶绿素荧光、光合有效辐射）。具体的配置因航次而异，并体现在输出文件的数据格式中。在站点的科研船舶上收集数据，进行从海面至近海底的剖面调查。下投数据应为干净的剖面，而用于采样和校准的水样瓶在上投时投放。