2003 - 2003 Centre for Environment, Fisheries & Aquaculture Science (Cefas) RV ENDEAVOUR 08/2003 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.本归档数据源自英国中央水产科学实验室（CEFAS，亦称DFR）的科考航次。观测范围大致覆盖欧洲陆架区域，同时包含部分来自伊比利亚深海平原的实测数据。数据采用船载下放式温盐深罗塞塔系统（CTD Rosette System）采集，该系统仅在作业船舶停泊待命时启用。通常会在指定水深触发采水器，采集水样用于仪器校准。早期航次仅采集有限的参数集合，核心观测参数包括压力（水深）、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（UNESCO）1978年与1983年发布的标准公式推算海水盐度。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（PAR, Photosynthetically Available Radiation）传感器。不同航次的仪器配置存在差异，这一特征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，作业流程为获取从海面至近海底的垂直剖面观测数据。下行观测剖面应保留干净的原始剖面数据，用于样本采集与校准的采水器将在仪器上升过程中触发启闭。