RV CIROLANA 08/1989 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.

本档案中的数据来源于 CEFAS（或 DFR）的科研巡航。这些数据广泛覆盖了欧洲大陆架，并包含来自伊比利亚海盆的一些数据。数据采集采用降低式CTD浮标系统，该系统在船舶静止时使用。通常在特定深度投放水样瓶，并采集样品以进行校准。在早期年份，仅收集了有限的参数，尤其是压力（深度）、温度和电导率（CTD）。根据 UNESCO 1978 年和 1983 年的公式，可利用电导率计算出盐度。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仪以及光照（叶绿素a吸收辐射，PAR）。具体的配置因巡航而异，并在输出文件的数据格式中得到体现。在站点上的科研船舶上采集了数据，从海面到近海底进行剖面调查。下投数据应是一条干净的水平剖面，而上投时则投放水样瓶以进行样品采集和校准。