Identification

Title

Copernicus Chlorophyll for the UK shelf 1998 to 2014

Abstract

This is a chlorophyll product developed from CMEMS product OCEANCOLOUR_ATL_CHL_L3_REP_OBSERVATIONS_009_067: DATASET-OC-ATL-CHL-MULTI-CCI-L3-CHL_1KM_DAILY-REP-V02. There are two gridded products, yearly growing season (March-October) mean chlorophyll concentrations, and yearly growing season 90th percentile chlorophyll concentrations. The data covers the period 1998 - 2014 and is at 1km resolution. Means and 90th percentiles are also provided for a set of regions used for eutrophication assessments: MSFD regions, regional seas, WFD coastal areas, and Ecohydrodynamic regions. Files: *grseason_chl_mean_98_14_v2.nc and grseason_chl_90pc_98_14_v3.nc* contain gridded growing season means and 90th percentiles for the years 1998 to 2014, at approximately 1km resolution. *grseason_chl_mean_98_14_v2_5km.nc and grseason_chl_90pc_98_14_v3_5km.nc* contain gridded growing season means and 90th percentiles for the years 1998 to 2014, at approximately 5km resolution. *chl_MSFD_grseasonstats_1998_2014.csv *contains growing season chlorophyll means and 90th percentiles for each of the MSFD regions: Greater North Sea and Celtic Seas for the years 1990 - 2014. *chl_RegionalSeas_grseasonstats_1998_2014.csv *contains growing season chlorophyll means and 90th percentiles for each of the regional seas (1-8, also known as charting progress 2 regions) for the years 1990 - 2014. *chl_WFD_coastal_grseasonstats_1990_2014_v1b.csv* contains growing season chlorophyll means and 90th percentiles for each of the WFD coastal assessment regions, for the years 1990 - 2014. *chl_Ecohydro_grseasonstats_1998_2014.csv *contains growing season chlorophyll means and 90th percentiles for Ecohydrodynamic regions (cropped to the MSFD region extent). Corresponding shapefiles for all of these regions are also available ( *MSFD_regions.zip*, *Regional_seas.zip*, *WFD_coastal.zip*, *Ecohydrodynamic_regions_cropped.zip*)

Resource type

dataset

Resource locator

https://data.cefas.co.uk/view/19628

name: Cefas Data Portal

description: 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.

function: download

Unique resource identifier

code

CEFAS19628

codeSpace

https://data.cefas.co.uk

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

environment

2012-01-11

Geographic location

West bounding longitude

-15.00

East bounding longitude

3.50

North bounding latitude

64.00

South bounding latitude

48.00

Temporal reference

Temporal extent

Begin position

1998-03-01

End position

2014-10-31

Dataset reference date

date type

notPlanned

Quality and validity

Lineage

This product was generated using E.U. Copernicus Marine Service Information. Daily values from remote sensing data (CMEMS product 009_067 DATASET-OC-ATL-CHL-MULTI-CCI-L3-CHL_1KM_DAILY-REP-V02) were used to obtain growing season 90th percentile values and means of chlorophyll concentrations to plot time series from 1998 to 2014. Processing was done in python (part A): 1. Load netcdfs 2. Subset to the area of interest (15°W to 4°E, 48°N to 64°N). 3. Export netcdf of subsetted data layer (for part B) 4. Calculate the 90th percentile over March-October for each year 5. Export netcdf of growing season 90th percentiles ( chl_grseason_90pc_1998_2014.nc) 6. Calculate the mean over March-October for each year 7. Export netcdf of growing season mean (chl_grseason_mean_1998_2014.nc) And R (part B) 1. Load netcdfs (from step 3 above) 2. Reshape data arrays to long data table format 3. Spatial overlay with regions 4. Calculate 90th percentile and mean over regions and growing season months for each year 5. Export csvs Additionally, to facilitate fast display in browsers the gridded netcdfs were resampled in R using bilinear interpolation to approximately 5km resolution.

Conformity

Conformity report

specification

title

INSPIRE Data Specification on Habitats and Biotopes – Technical Guidelines

reference date

date type

publication

effective date

2013-12-10

degree

false

explanation

See the referenced specification

Conformity report

specification

title

reference date

date type

publication

effective date

2010-12-08

degree

true

explanation

See the referenced specification

Data format

name of format

Unknown

version of format

Constraints related to access and use

Constraint set

Limitations on public access

Constraint set

responsible party role

distributor

Responsible party

organisation name

European Commission

email address

info@publications.europa.eu

responsible party role

owner

Metadata on metadata

Metadata point of contact

organisation name

Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

email address

data.manager@cefas.co.uk

responsible party role

pointOfContact

Metadata date

2025-04-29T12:43:03

Metadata language

eng