1993 - 1993 Centre for Environment, Fisheries & Aquaculture Science (Cefas) RV CORYSTES 2C/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.本归档数据采集自CEFAS（亦称DFR）的科研航次。 数据覆盖范围以欧洲陆架为主，同时包含部分来自伊比利亚深海平原的观测资料。 数据采集采用布放式温盐深采水器阵列（lowered CTD rosette system），该系统仅在船舶锚泊待命时启用。通常会在指定深度触发采水器采集水样以开展校准工作。早期仅采集有限的参数类型，核心参数为压力（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设备，主要包括荧光计、光学后散射仪/透射仪以及光合有效辐射传感器（PAR，photo synthetically available radiation）。不同航次的仪器配置存在差异，该差异也体现在输出文件的数据格式中。 数据由科研船舶在站位作业时采集，获取从海面至近海底的完整水文剖面。下行剖面数据应为干净无干扰的标准剖面。用于水样采集与校准的采水器将在上升过程中触发。