Identification

Title

DAERA Annual Chlorophyll a Survey (2008-2017)

Abstract

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)

Resource type

dataset

Resource locator

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

name: DAERA Chlorophyll a survey results - 2008 to 2017

description: A link to the web service or dataset

http://https://www.opendatani.gov.uk

name: OpenData NI portal

description: A link to the general site

Unique resource identifier

code

DAERA-CHL

codeSpace

http://www.daera-ni.gov.uk

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

urn:ogc:def:crs:EPSG::4326

Classification of spatial data and services

Topic category

oceans

Keywords

Keyword set

keyword value

Keyword set

keyword value

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

revision

effective date

2008-01-06

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

revision

effective date

2009-11-16

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

creation

effective date

2006-08-31

Geographic location

West bounding longitude

-7.3833

East bounding longitude

-5.2739

North bounding latitude

55.3492

South bounding latitude

53.9639

Extent

Extent group

authority code

title

reference date

date type

creation

effective date

2009-06-18

code identifying the extent

Irish Sea

Extent group

authority code

title

reference date

date type

creation

effective date

2009-06-18

code identifying the extent

Minches & Western Scotland

Extent group

authority code

title

reference date

date type

creation

effective date

2009-05-01

code identifying the extent

39E2

Extent group

authority code

title

reference date

date type

creation

effective date

2009-05-01

code identifying the extent

37E3

Extent group

authority code

title

reference date

date type

creation

effective date

2009-05-01

code identifying the extent

39E3

Extent group

authority code

title

reference date

date type

creation

effective date

2009-05-01

code identifying the extent

37E4

Extent group

authority code

title

reference date

date type

creation

effective date

2009-05-01

code identifying the extent

38E4

Extent group

authority code

title

reference date

date type

creation

effective date

2009-05-01

code identifying the extent

39E4

Extent group

authority code

title

reference date

date type

revision

effective date

2010-01-01

code identifying the extent

water column

Temporal reference

Temporal extent

Begin position

2008-01-22

End position

2017-12-06

Dataset reference date

date type

publication

effective date

2018-04-26

date type

creation

effective date

2018-04-26

date type

revision

effective date

2020-02-18

Frequency of update

annually

Quality and validity

Lineage

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.

Conformity

Conformity report

specification

title

reference date

date type

publication

effective date

2011-02-02

degree

true

explanation

See the referenced specification

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

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.

Constraint set

Limitations on public access

No restriction to public access

Responsible organisations

Responsible party

contact position

Data contact

organisation name

Department of Agriculture, Environment and Rural Affairs

email address

Marine.InfoRequests@daera-ni.gov.uk

responsible party role

originator

Responsible party

contact position

Data contact

organisation name

Department of Agriculture, Environment and Rural Affairs

email address

Marine.InfoRequests@daera-ni.gov.uk

responsible party role

custodian

Metadata on metadata

Metadata point of contact

contact position

Data contact

organisation name

Department of Agriculture, Environment and Rural Affairs

email address

Marine.InfoRequests@daera-ni.gov.uk

responsible party role

pointOfContact

Metadata date

2020-02-18

Metadata language