CEFAS153fd23b-da97-45ec-b069-169ea37aafc5
English
dataset
Centre for Environment, Fisheries & Aquaculture Science
Data Manager
+44 (0)1502 562244
Cefas Lowestoft Laboratory
Pakefield Road
Lowestoft
Suffolk
NR33 0HT
UK
data.manager@cefas.co.uk
pointOfContact
2020-09-10T13:55:00
MEDIN Discovery Metadata Standard
Version 2.3.7
urn:ogc:def:crs:EPSG::4326
OGP
1990 - 2014 Centre for Environment, Fisheries & Aquaculture Science (Cefas) Data for UK OSPAR Common Procedure - Eutrophication Assessment - 1990 to 2014
2020-09-10
publication
CEFAS153fd23b-da97-45ec-b069-169ea37aafc5
http://www.cefas.co.uk/
This dataset contains <span style="display: inline !important; float: none;
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0px;">...</span> which were used in the 3rd application of the OSPAR Common
Procedure for Assessment of Eutrophication and UK Marine Strategy Framework
Directive Assessments for descriptor 5.
Centre for Environment, Fisheries & Aquaculture Science
Data Manager
+44 (0)1502 562244
Cefas Lowestoft Laboratory
Pakefield Road
Lowestoft
Suffolk
NR33 0HT
UK
data.manager@cefas.co.uk
originator
Centre for Environment, Fisheries & Aquaculture Science
Data Manager
+44 (0)1502 562244
Cefas Lowestoft Laboratory
Pakefield Road
Lowestoft
Suffolk
NR33 0HT
UK
data.manager@cefas.co.uk
custodian
notPlanned
NDGO0005
Eutrophication
GEMET, version 1.0
2008-06-01
publication
Habitats and biotopes
GEMET - INSPIRE themes, version 1.0
2008-06-01
publication
Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply
otherRestrictions
Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply
English
biota
SeaVoX Vertical Co-ordinate Coverages
2010-05-18
revision
Water column
1.73881
1.74086
52.4581
52.4595
1990-01-01T00:00:00.000Z
2014-12-31T00:00:00.000Z
http://data.cefas.co.uk/#/View/19289/order
dataset
Data for nutrient concentrations, chlorophyll and dissolved oxygen (DO) concentrations
and all supporting metadata for coastal and offshore (marine) waters were extracted from
the following databases for the period from 1990 to 2014: 1. MERMAN (BODC). Discrete
samples for chlorophyll (by fluorometry), dissolved oxygen, salinity and temperature,
and nutrients (including nitrate, nitrite, total oxidised nitrogen, ammonium, phosphate
and silicate), from 1999 to 2014. MERMAN data did not include water column depth so this
was extracted from GEBCO bathymetry (ref). 2. NODB (BODC). Discrete bottle samples and
calibrated profile data for where bottles were fired. Chlorophyll (obtained from a
variety of methods, where only relevant ones were used and maximum chlorophyll value
taken where more than one method was used simultaneously), oxygen, salinity and
temperature, nutrients (including nitrite, total oxidised nitrogen, ammonium, phosphate
and silicate), from 1990 to 2014. 3. Sapphire (Cefas). Discrete samples of chlorophyll,
dissolved oxygen, salinity and temperature, and nutrients (including nitrate, nitrite,
total oxidised nitrogen, ammonium, phosphate and silicate), from 1990 to 2012. Sapphire
data did not always include water column depth so this was extracted from GEBCO
bathymetry where missing. Some degree of overlapping between the MERMAN and the Sapphire
dataset is possible, but was investigated and believed to be minimal. 4. Smartbuoy
(Cefas). Weekly averages of calibrated continuous data from smartbuoys and landers for
chlorophyll, dissolved oxygen, salinity and temperature, and nutrients (including
nitrite, total oxidised nitrogen, and silicate), from 2000 to 2014. 5. Scottish
monitoring stations (Marine Scotland Science). Weekly samples from four coastal
monitoring stations for chlorophyll, dissolved oxygen, salinity and temperature, and
nutrients (including nitrate, nitrite, total oxidised nitrogen, ammonium, phosphate and
silicate), from 1997 to 2013. All datasets were averaged by station, datetime and sample
depth to average replicate samples, and then combined into a UK dataset. To incorporate
data collected in UK waters by other countries, and data that was submitted directly to
ICES and not via BODC, we also incorporated data from the `ICES OCEAN database`_ .
This included bottle data and profiles aggregated to standard depths, for chlorophyll,
dissolved oxygen, salinity and temperature, and nutrients (including nitrate, nitrite,
ammonium, phosphate and silicate) from 1990 to 2014. Total oxidised nitrogen was
calculated by summing nitrate and nitrite. Water column depth was normally included, but
where it was not it was obtained from GEBCO bathymetry. There were some duplicates
between the UK dataset and the ICES dataset. In order to remove these, they were matched
based on spatial and temporal location, by rounding latitude and longitude to 2 decimal
places, sample depth to the nearest 5 m and datetime to the nearest minute. This was
used to create a spatiotemporal ID and each dataset was averaged based on this ID.
Samples were removed from the ICES dataset where they were also present in the UK
dataset, and then the two datasets were combined to produce a final dataset for the
assessment. Data filtering: Marine data were assigned to coastal or offshore waters
based on salinity. Coastal data had salinity between 30 and 34.5, and offshore data had
salinity greater than or equal to 34.5, with the exception of the Irish Sea where the
boundary was at 34 psu (Foden et al., 2011). Data was then filtered by season for
nutrients (winter, 1st November to 28th February), chlorophyll (growing season, 1 March
to 31 October) and dissolved oxygen (stratified season, 1 July to 31 October). Dissolved
oxygen data was filtered by depth to include only the deepest sample within 10 m of the
seabed, where water column depth was <500 m. Mean winter values were assigned to the
year relevant to the phytoplankton growing season. For example, nutrient data for
November and December of 2009 and January and February of 2010 were reported as 2010
winter nutrients. For nutrients and chlorophyll, data were averaged over the whole water
column for each cruise station and day, with the exception of MERMAN data where datetime
was used instead of day as there were multiple records in different locations (along
transects) for the same station and day. This dataset is intended to provide a record of
the exact data used in the UK comprehensive eutrophication assessment, for use only in
eutrophication assessments. The data included is not the most up to date version, and
some of the data included in this dataset are available elsewhere. To use data for any
other purposes please visit the original providers for the most up to date data. 1.
MERMAN - These data are a snapshot of the data held within MERMAN obtained in November
2015. The data were supplied by the British Oceanographic Data Centre on behalf of the
Clean Safe Seas Evidence Group. Data were collected by the Agri-Food and Biosciences
Institute, Centre for Environment, Fisheries and Aquaculture Science, Department of
Agriculture, Environment and Rural Affairs, Environment Agency, Food Standards Scotland,
Marine Scotland Science, Natural Resource Wales and Scottish Environment Protection
Agency. The data were funded by Agri-Food Biosciences institute, Department of
Agriculture, Environment and Rural Affairs, Department for Environment, Food and Rural
Affairs and Scottish Government. These data contain public sector information licensed
under the Open Government Licence v3.0.
`https://www.bodc.ac.uk/projects/data_management/uk/merman/assessments_and_data_access/`_
2. British Oceanographic Database (BODB), provided by Polly Hadziabdic in March 2016.
`https://www.bodc.ac.uk/data/bodc_database/nodb/`_ 3. ICES Oceanography Database
(OCEAN), Extraction November 2015 by Else Juul Green.
`https://ocean.ices.dk/HydChem/HydChem.aspx`_
.. _`ices ocean database`:
https://ocean.ices.dk/HydChem/HydChem.aspx?plot=yes
.. _`https://www.bodc.ac.uk/projects/data_management/uk/merman/assessments_and_data_access/`:
https://www.bodc.ac.uk/projects/data_management/uk/merman/assessments_and_data_access/
.. _`https://www.bodc.ac.uk/data/bodc_database/nodb/`:
https://www.bodc.ac.uk/data/bodc_database/nodb/
.. _`https://ocean.ices.dk/hydchem/hydchem.aspx`:
https://ocean.ices.dk/HydChem/HydChem.aspx?plot=yes