2fd970bce0d98968d0c9017bf049571e
English
dataset
Department of Agriculture, Environment and Rural Affairs
Data contact
Marine.InfoRequests@daera-ni.gov.uk
pointOfContact
2022-07-22
MEDIN Discovery metadata standard
2.3.8
urn:ogc:def:crs:EPSG::4326
DAERA Annual Chlorophyll a Survey (2008-2017)
2018-04-26
publication
2018-04-26
creation
2020-02-18
revision
DAERA-CHL
http://www.daera-ni.gov.uk
The chlorophyll a survey is an annual assessment of the Chlorophyll a concentration in micrograms per litre found in surface waters in coastal and transitional (estuarine) waters around Northern Ireland. Spot samples are taken at established sample sites and returned to the laboratory for analysis. The dataset contributes to Water Framework Directive (WFD) classification, as well as providing a eutrophication indicator under Nitrates Directive (ND), and Urban Waste Water Treatment Directive (UWWTD). Selected samples are submitted to the MERMAN database for inclusion in the CSEG (Clean Seas Evidence Group) work programme. The data held in MERMAN fulfils the UK's mandatory monitoring requirements under the Oslo and Paris Convention (OSPAR), Joint Assessments and Monitoring Programme (JAMP). Within DAERA, this survey forms part of the Marine Phytoplankton and Chlorophyll work programme (MM(YY)-14)
Department of Agriculture, Environment and Rural Affairs
Data contact
Marine.InfoRequests@daera-ni.gov.uk
originator
Department of Agriculture, Environment and Rural Affairs
Data contact
Marine.InfoRequests@daera-ni.gov.uk
custodian
annually
Delimited
Marine Environmental Data and Information Network
NDGO0005
Oceanographic geographical features
GEMET - INSPIRE themes, version 1.0
2008-01-06
revision
Chlorophyll pigment concentrations in water bodies
SeaDataNet P021 parameter discovery vocabulary
2009-11-16
revision
Marine Environment Monitoring
Global Change Master Directory Science Keywords V5
2006-08-31
creation
Although the Department (of Agriculture, Environment and Rural Affairs - DAERA) has made every effort to prepare the data and believes the information it contains is reliable within the context in which the data was originally generated/collected, errors within the data remain a possibility. Therefore the Department gives no warranty regarding the accuracy or suitability of the data for the data requestors intended use, and accepts no responsibility for any errors or omissions, or for the use of, or results obtained from the use of this data, whether in part or in whole.
otherRestrictions
No restriction to public access
English
oceans
Charting Progress 2 Sea Areas
2009-06-18
creation
Irish Sea
Charting Progress 2 Sea Areas
2009-06-18
creation
Minches & Western Scotland
ICES Rectangles
2009-05-01
creation
39E2
ICES Rectangles
2009-05-01
creation
37E3
ICES Rectangles
2009-05-01
creation
39E3
ICES Rectangles
2009-05-01
creation
37E4
ICES Rectangles
2009-05-01
creation
38E4
ICES Rectangles
2009-05-01
creation
39E4
SeaDataNet vertical extent keywords
2010-01-01
revision
water column
-7.3833
-5.2739
53.9639
55.3492
2008-01-22
2017-12-06
Department of Agriculture, Environment and Rural Affairs
Data contact
Marine.InfoRequests@daera-ni.gov.uk
distributor
https://www.opendatani.gov.uk/dataset/9a98860a-1c75-4cfa-9916-4cd2918a7147/resource/56c8c882-cdb0-4353-aa56-cccd42f647fa/download/daera-chlorophyll-a-survey-data---2008-to-2017.ods
DAERA Chlorophyll a survey results - 2008 to 2017
A link to the web service or dataset
https://www.opendatani.gov.uk
OpenData NI portal
A link to the general site
dataset
MEDIN data guideline for the recording of water sample data
2011-02-02
publication
See the referenced specification
true
Samples are collected from a boat by surface water collection in sterilised glass nalgene bottles. Samples are filtered within 24 hours under vacuum filtration, using Whatman GF/C47mm glass microfibre filter papers. Filter papers are left overnight at 4 degrees celcius in the dark with cold acetone to extract. Analysis is performed in house on a Turner Designs 'Trilogy' fluorometer. Samples are analysed in duplicate and the average is reported. Solid standard QCs are used at the start and end of runs and reported on Shewart charts. Calibration is carried out at 4 points using RS AQUA liquid standards. Participation in QUASIMEME is mandatory for all staff who take part in the analysis. In house training is provided by competent staff members. Analysis is of Chlorophyll a only.