2000 - 2000 Centre for Environment, Fisheries & Aquaculture Science (Cefas) RV CORYSTES 04/2000 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 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.本归档数据采集自CEFAS（亦作DFR）的科考航次。数据覆盖范围大致涵盖欧洲陆架区域，同时包含部分来自伊比利亚深海平原的观测数据。 数据采集采用系放下式CTD采水器阵列（lowered CTD rosette system），该系统在科考船停航状态下作业。通常会在特定深度触发采水瓶采集水样以用于校准。 早期仅采集有限的参数类型，主要为压力（深度）、温度与电导率（CTD）。可基于电导率数据，通过联合国教科文组织1978年、1983年发布的公式计算盐度。后续航次新增了更多传感器，主要包括荧光计（fluorometer）、光学后向散射仪或透射仪（optical back scatter or transmissometers），以及光合有效辐射（PAR，photosynthetically available radiation）传感器。各航次的仪器配置存在差异，这一点体现在输出文件的数据格式中。 数据由科考船在定点站位采集，开展从海面至近海底的剖面测量作业。下行剖面数据应为干净的标准剖面；用于水样采集与校准的采水瓶将在上升过程中触发。