DAERA Annual Chlorophyll a Survey (2008-Present)
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)
dataset
http://www.appsd.daera-ni.gov.uk/marinemapviewer/
name: Northern Ireland Marine Mapviewer
description: A link to the web service or dataset
name: DAERA website
description: A link to the general host site
DAERA-CHL
http://www.daera-ni.gov.uk
eng
urn:ogc:def:crs:EPSG::4326
oceans
revision
2008-01-06
revision
2009-11-16
creation
2006-08-31
-7.3833
-5.2739
55.3492
53.9639
creation
2009-06-18
Irish Sea
creation
2009-06-18
Minches & Western Scotland
creation
2009-05-01
39E2
creation
2009-05-01
37E3
creation
2009-05-01
39E3
creation
2009-05-01
37E4
creation
2009-05-01
38E4
creation
2009-05-01
39E4
creation
1954-01-01
Inner Seas off the West Coast of Scotland
creation
1954-01-01
Irish Sea and St. George's Channel
creation
2014-05-16
27
revision
2010-01-01
epipelagic water column
2008-01-22
2017-12-06
publication
2018-04-26
creation
2018-04-26
revision
2018-04-26
annually
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.
publication
2011-02-02
true
See the referenced specification
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.
No restriction to public access
Data contact
Department of Agriculture, Environment and Rural Affairs
Marine.InfoRequests@daera-ni.gov.uk
originator
Data contact
Department of Agriculture, Environment and Rural Affairs
Marine.InfoRequests@daera-ni.gov.uk
custodian
Data contact
Department of Agriculture, Environment and Rural Affairs
Marine.InfoRequests@daera-ni.gov.uk
pointOfContact
2018-04-26