CEFASc980cda1-b4a4-4735-9a54-2134f9ef05b9 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 2026-07-29T08:49:53 EPSG Geodetic Parameter Registry 2022-01-07 revision WGS 84 CTD (Conductivity, Temperature and Depth) ESM2 profile data for the POSEIDON project in the Celtic Seas and English Channel for autumn 2012 to 2016 2023-05-25 publication 2026-07-29 revision 2015-03-10 creation CEFAS3288 https://data.cefas.co.uk ESM2 CTD (Conductivity, Temperature and Depth) profile data for CEND20_13, CEND20_14, CEND22_15, CEND22_16, part of the annual autumn pelagic survey in the English Channel, Celtic Sea and Bristol Channel running from 2012-2016. ESM2 is a Cefas developed micro logger for applications requiring a small low power logger with integrated sensors and battery. It has standard sensors for conductivity, temperature, depth, optical backscatter and roll and pitch, and was also fitted with an oxygen optode, sea point fluorometer and light profiler. 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 notPlanned Water column temperature and salinity SeaDataNet P03 parameter discovery vocabulary 2011-03-25 revision Raw fluorometer output Dissolved oxygen parameters in the water column Chlorophyll pigment concentrations in the water column SeaDataNet P02 parameter discovery vocabulary 2011-03-25 revision Oceanographic geographical features 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 oceans -8.00 2.00 48.50 54.00 2013-10-13 2016-10-17 Delimited Geographic Information System https://data.cefas.co.uk/view/3288 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 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 An ESM2 profiler was deployed, either attached to a CTD rosette or independently where conditions were too rough to deploy the rosette. Data were subject to a full quality assurance procedure which assigned flags to poor quality data (e.g. for sensor malfunction, drift). Only good quality data is included here, with flags to show the QA level: - **QA2:**- Manually reviewed and quality controlled. - **QA3:**- Data calibrated against field samples to produce derived scientific measurements. - **QA4:**- Additional correction applied to dissolved oxygen measurements to account for effects of salinity, temperature and pressure. Data were extracted from the database and binned to 0.5m depth resolution from the upcast data only. Chlorophyll a analysis results from HPLC (high-performance liquid chromatography, see `https://doi.org/10.14466/CefasDataHub.75`_) were used to convert fluorescence measurements from the ESM2 profiler to chlorophyll a concentration. ESM2 profiles were binned to 0.1m bins, and matched with the discrete HPLC samples using the survey name, and depth and location (closest match, with filters applied to exclude any bad matches). The relationship between total chlorophyll a and fluorescence (using simple linear regression for each survey) was then used to convert fluorescence to chlorophyll a where this relationship was of sufficient quality. .. _`https://doi.org/10.14466/cefasdatahub.75`: https://doi.org/10.14466/CefasDataHub.75 MEDIN 3.1.2