CEFAS1c58089b-616c-4375-97e8-28941d8750c1 English dataset Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk pointOfContact 2026-02-27T01:43:17 EPSG Geodetic Parameter Registry 2022-01-07 revision 4323 EPSG Geodetic Parameter Registry 2022-01-07 revision WGS 84 Underway (Ferrybox) data collected in North West European Shelf waters from 2010 onwards 2024-07-18 publication 2026-02-27 revision 2024-04-09 creation CEFAS21871 https://data.cefas.co.uk A 4H JENA Ferrybox system runs continuously on RV Cefas Endeavour during all surveys where appropriate since 2010, generating data across the North Sea, Irish Sea, and English Channel at a resolution of one measurement per minute. A continuous inflow is taken from a dedicated inlet and pump at approximately 4m under the waterline. Key parameters measured include sea surface temperature **(SST)**, through a hull mounted temperature probe**,** salinity **(SAL),** chlorophyll fluorometry **(FLUORS)**, turbidity **(FTU),** and Photosynthetically Active Radiation **(PAR)**. Other parameters recorded include meteorological variables, oxygen concentrations, and measures of photosynthetic activity. New data is added annually. Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk originator Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk custodian Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk distributor Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) data.manager@cefas.co.uk owner Department for Environment, Food and Rural Affairs (DEFRA) defra.helpline@defra.gov.uk owner continual Water column temperature and salinity SeaDataNet P03 parameter discovery vocabulary 2011-03-25 revision Temperature of the water column Salinity of the water column SeaDataNet P02 parameter discovery vocabulary 2011-03-25 revision Oceanographic geographical features Habitats and biotopes GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Water column SeaVoX Vertical Co-ordinate Coverages 2010-05-18 revision Marine Environmental Data and Information Network MEDIN metadata record availability 2012-01-11 publication data.gov.uk MEDIN metadata record availability 2012-01-11 publication otherRestrictions noLimitations otherRestrictions Public data - no limitations to reuse English environment oceans -18.00 14.00 47.50 64.00 2010-08-07 2026-02-27 Delimited Geographic Information System Unknown https://data.cefas.co.uk/view/21871 Cefas Data Portal download The Cefas Data Portal contains metadata records and data sets available to download and connect to in support of our commitment to open science. Data is available in the following formats: CSV, ESRI Shapefile. The data can also be accessed via the WFS and WMS protocols. dataset INSPIRE Data Specification on Oceanographic geographical features – Technical Guidelines 2013-12-10 publication false See the referenced specification INSPIRE Data Specification on Habitats and Biotopes – Technical Guidelines 2013-12-10 publication false See the referenced specification Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 publication true See the referenced specification Water passes through the hull inlet while Endeavour is underway, then enters a circuit which contains other instruments approximately three minutes later. Data is autonomously recorded by the Ferrybox system, by taking an average of sensors readings over a minute, and stored on the Ferrybox computer on board Cefas Endeavour. Data is transferred to central network drives upon the ships return to shore, and is backed up by an emailer module every 10 minutes while the ship is underway. QA is completed on shore using a custom R script. GPS data is checked to remove errors, including automatic checks of speed, course, and location. A correction for flow lag is applied to sensors within the ferrybox pipework, and data recorded during acid washes and where flow rates were too high or low is flagged. All variables are checked for reasonable ranges and rates of change. Data is validated by comparisons against discrete samples in the case of salinity, and for temperature and fluorescence though comparison between different instruments measuring the same parameter (eg. hull temperature probe and in-circuit seabird temperature sensor). In-house calibrations are also used to correct for instrument drift. Suspended particulate matter is derived from turbidity (FTU) values using the relationship between discrete samples and turbidity measurements throughout the ferrybox series. Chlorophyll is derived by survey using the relationship between fluorescence and discrete samples taken, for surveys where no discrete sample is taken a generic relationship is used.Only data which has passed all quality control checks is included in this product.This product includes data at both **qc_level** 2 and 3 **qc_level 2** is where all of the above checks have been done, but offsets / corrections based on external reference material have not been applied. At **qc_level 3** where these corrections have been applied. MEDIN 3.1.1