1993 - 1993 Centre for Environment, Fisheries & Aquaculture Science (Cefas) RV CORYSTES 6A/1993 High 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.本档案中的数据采集自CEFAS（或DFR）科研航次。数据覆盖范围基本涵盖欧洲陆架，另有部分数据来自伊比利亚深海平原。数据采用下放式CTD采水系统（lowered CTD rosette system）采集，该系统仅可在船舶停航状态下作业。通常会在预设深度触发采水瓶，采集样本用于校准工作。早期航次仅采集有限的参数集，核心参数包括压力（深度）、温度与电导率（CTD）。可基于电导率数据，依据联合国教科文组织（UNESCO）1978年、1983年发布的标准公式计算盐度。后续航次新增了更多传感器，主要包括荧光计、光学后向散射仪、透射仪以及光照（光合有效辐射，Photosynthetically Available Radiation, PAR）。不同航次的系统配置存在差异，这一差异会体现在输出文件的数据格式中。 数据由科研船舶在站位采集，测量剖面覆盖从海面至近海底的全水层。下行测量数据应为无异常干扰的标准剖面。用于样本采集与校准的采水瓶会在上升剖面阶段触发。