1995 - 1995 Centre for Environment, Fisheries & Aquaculture Science (Cefas) RV CORYSTES 10/1995 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 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.本归档数据集源自英国环境、渔业与水产养殖科学中心（CEFAS，亦可称DFR）的科考航次采集数据。数据集覆盖范围大致涵盖欧洲陆架海域，同时包含少量来自伊比利亚深海平原的观测数据。数据采集采用船舶静止状态下作业的投弃式CTD采水器架系统（lowered CTD rosette system）。通常会在指定水深触发采水瓶采集样本，用于后续校准工作。早期仅采集有限的参数集合，核心参数包括压力（水深）、温度与电导率（CTD）。可基于电导率数据，结合联合国教科文组织（UNESCO）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、光学后向散射仪、透射仪以及光合有效辐射传感器（PAR，Photo Synthetically Available Radiation）。不同航次的传感器配置存在差异，该差异会体现在输出文件的数据格式中。 数据由科考船在站位作业期间采集，采集流程为获取从海面至近海底的垂直剖面数据。下行剖面数据应为纯净无干扰的垂直剖面。用于样本采集与校准的采水瓶会在上升剖面阶段触发。