RV CORYSTES 05/1999 High 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.

本档案中所收集的数据源自 CEFAS（或 DFR）的研究调查。该数据集广泛覆盖了欧洲大陆架，并包含来自伊比利亚海盆的部分数据。数据采集采用下沉式温盐深仪（CTD）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进行样品采集和校准。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 年和 1983 年的公式计算盐度。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仪以及光（包括光合有效辐射）。具体的配置因航次而异，并在输出文件的数据格式中得到体现。数据采集自驻站科研船舶，从海面至近海底进行剖面调查。下沉数据应为干净剖面，而用于样品采集和校准的水瓶则在上浮时释放。