• Catalogue PIGMA
  •  
  •  
  •  

Mediterranean Sea, Bio-Geo-Chemical, L3, daily observation

'''Short description:'''

The High-Resolution Ocean Colour (HR-OC) Consortium (Brockmann Consult, Royal Belgian Institute of Natural Sciences, Flemish Institute for Technological Research) distributes Remote Sensing Reflectances (RRS, expressed in sr-1), Turbidity (TUR, expressed in FNU), Solid Particulate Matter Concentration (SPM, expressed in mg/l), spectral particulate backscattering (BBP, expressed in m-1) and chlorophyll-a concentration (CHL, expressed in µg/l) for the Sentinel 2/MSI sensor at 100m resolution for a 20km coastal zone. The products are delivered on a geographic lat-lon grid (EPSG:4326). To limit file size the products are provided in tiles of 600x800 km². RRS and BBP are delivered at nominal central bands of 443, 492, 560, 665, 704, 740, 783, 865 nm. The primary variable from which it is virtually possible to derive all the geophysical and transparency products is the spectral RRS. This, together with the spectral BBP, constitute the category of the 'optics' products. The spectral BBP product is generated from the RRS products using a quasi-analytical algorithm (Lee et al. 2002). The 'transparency' products include TUR and SPM). They are retrieved through the application of automated switching algorithms to the RRS spectra adapted to varying water conditions (Novoa et al. 2017). The GEOPHYSICAL product consists of the Chlorophyll-a concentration (CHL) retrieved via a multi-algorithm approach with optimized quality flagging (O'Reilly et al. 2019, Gons et al. 2005, Lavigne et al. 2021). The NRT products are generally provided withing 24 hours up to 3 days after end of the day.The RRS product is accompanied by a relative uncertainty estimate (unitless) derived by direct comparison of the products to corresponding fiducial reference measurements provided through the AERONET-OC network. The current day data temporal consistency is evaluated as Quality Index (QI) for TUR, SPM and CHL: QI=(CurrentDataPixel-ClimatologyDataPixel)/STDDataPixel where QI is the difference between current data and the relevant climatological field as a signed multiple of climatological standard deviations (STDDataPixel).

'''Processing information:'''

The HR-OC processing system is deployed on Creodias where Sentinel 2/MSI L1C data are available. The production control element is being hosted within the infrastructure of Brockmann Consult. The processing chain consists of:

* Resampling to 60m and mosaic generation of the set of Sentinel-2 MSI L1C granules of a single overpass that cover a single UTM zone.

* Application of a glint correction taking into account the detector viewing angles

* Application of a coastal mask with 20km water + 20km land. The result is a L1C mosaic tile with data just in the coastal area optimized for compression.

* Level 2 processing with pixel identification (IdePix), atmospheric correction (C2RCC and ACOLITE or iCOR), in-water processing and merging (HR-OC L2W processor). The result is a 60m product with the same extent as the L1C mosaic, with variables for optics, transparency, and geophysics, and with data filled in the water part of the coastal area.

* invalid pixel identification takes into account corrupted (L1) pixels, clouds, cloud shadow, glint, dry-fallen intertidal flats, coastal mixed-pixels, sea ice, melting ice, floating vegetation, non-water objects, and bottom reflection.

* Daily L3 aggregation merges all Level 2 mosaics of a day intersecting with a target tile. All valid water pixels are included in the 20km coastal stripes; all other values are set to NaN. There may be more than a single overpass a day, in particular in the northern regions. The main contribution usually is the mosaic of the zone, but also adjacent mosaics may overlap. This step comprises resampling to the 100m target grid.

* Monthly L4 aggregation combines all Level 3 products of a month and a single tile. The output is a set of 3 NetCDF datasets for optics, transparency, and geophysics respectively, for the tile and month.

* Gap filling combines all daily products of a period and generates (partially) gap-filled daily products again. The output of gap filling are 3 datasets for optics (BBP443 only), transparency, and geophysics per day.

'''Description of observation methods/instruments:'''

Ocean colour technique exploits the emerging electromagnetic radiation from the sea surface in different wavelengths. The spectral variability of this signal defines the so-called ocean colour which is affected by the presence of phytoplankton.

'''Quality / Accuracy / Calibration information:'''

A detailed description of the calibration and validation activities performed over this product can be found on the CMEMS web portal and in CMEMS-BGP_HR-QUID-009-201to212.

'''Suitability, Expected type of users / uses:'''

This product is meant for use for educational purposes and for the managing of the marine safety, marine resources, marine and coastal environment and for climate and seasonal studies.

'''Dataset names: '''

*cmems_obs_oc_ibi_bgc_geophy_nrt_l3-hr_P1D-v01

*cmems_obs_oc_ibi_bgc_transp_nrt_l3-hr_P1D-v01

*cmems_obs_oc_ibi_bgc_optics_nrt_l3-hr_P1D-v01

'''Files format:'''

*netCDF-4, CF-1.7

*INSPIRE compliant.

'''DOI (product) :'''

https://doi.org/10.48670/moi-00109

Simple

Alternate title
OCEANCOLOUR_MED_BGC_HR_L3_NRT_009_205
Date (Creation)
2021-04-26
Edition
2.1
Edition date
2023-11-30
Identifier
c012de84-bfc4-4030-9b12-2c1c2648f55f
Credit
E.U. Copernicus Marine Service Information
Resource provider
  HROC-BC-HAMBURG-GE -
Maintenance and update frequency
Daily
Other
/
Maintenance note
23:30
GEMET - INSPIRE themes, version 1.0
  • Oceanographic geographical features
Discipline
  • satellite-observation
Climate and Forecast Standard Names
  • sea_water_turbidity
  • mass_concentration_of_suspended_matter_in_sea_water
  • volume_backwards_scattering_coefficient_of_radiative_flux_in_sea_water_due_to_particles
  • surface_ratio_of_upwelling_radiance_emerging_from_sea_water_to_downwelling_radiative_flux_in_air
  • mass_concentration_of_chlorophyll_a_in_sea_water
Temporal scale
  • near-real-time
Area of benefit
  • marine-resources
  • weather-climate-and-seasonal-forecasting
  • marine-safety
  • coastal-marine-environment
Reference Geographical Areas
  • mediterranean-sea
Processing level
  • Level 3
Model assimilation
  • Not Applicable
Use limitation
See Copernicus Marine Environment Monitoring Service Data commitments and licence at: http://marine.copernicus.eu/web/27-service-commitments-and-licence.php
Access constraints
Other restrictions
Use constraints
License
Other constraints
No limitations on public access
Date (Creation)
2019-05-08
Association Type
Cross reference
Initiative Type
reference
Date (Creation)
2019-05-08
Association Type
Cross reference
Initiative Type
reference
Date (Creation)
2019-05-08
Association Type
Cross reference
Initiative Type
reference
Date (Creation)
2019-05-08
Association Type
Cross reference
Initiative Type
reference
Date (Creation)
2019-05-08
Association Type
Cross reference
Initiative Type
reference
Aggregate Datasetindentifier
f826e960-a9d2-433b-a420-e4b74f7ea8f5
Association Type
Cross reference
Initiative Type
document
Aggregate Datasetindentifier
311aa0e8-3987-478b-9e7e-960661e34da0
Association Type
Cross reference
Initiative Type
document
Aggregate Datasetindentifier
518531de-c5e4-4e21-9894-d482e32db1ea
Association Type
Cross reference
Initiative Type
document
Metadata language
eng
Topic category
  • Oceans
Description
bounding box
N
S
E
W
thumbnail


Begin date
2020-01-01

Vertical extent

Minimum value
0
Maximum value
0
Vertical CRS
  • urn:ogc:def:crs:EPSG:5714
Supplemental Information
display priority: 11705
Reference system identifier
EPSG / WGS 84 (EPSG:4326)
Number of dimensions
2
Dimension name
Row
Resolution
0.1  km
Dimension name
Column
Resolution
0.1  km
Cell geometry
Area
Transformation parameter availability
No
Distribution format
  • NetCDF-4 ( Classic model )

OnLine resource
cmems_obs_oc_med_bgc_geophy_nrt_l3-hr_P1D-m ( WWW:STAC )

For accessing native data and Analysis-ready Cloud-optimized data services, consult this STAC metadata endpoint

OnLine resource
cmems_obs_oc_med_bgc_optics_nrt_l3-hr_P1D-m ( WWW:STAC )

For accessing native data and Analysis-ready Cloud-optimized data services, consult this STAC metadata endpoint

OnLine resource
cmems_obs_oc_med_bgc_transp_nrt_l3-hr_P1D-m ( WWW:STAC )

For accessing native data and Analysis-ready Cloud-optimized data services, consult this STAC metadata endpoint

OnLine resource
cmems_obs_oc_med_bgc_tur-spm-chl_nrt_l3-hr-mosaic_P1D-m ( WWW:STAC )

For accessing native data and Analysis-ready Cloud-optimized data services, consult this STAC metadata endpoint

OnLine resource
cmems_obs_oc_med_bgc_tur-spm-chl_nrt_l3-hr-mosaic_P1D-m ( OGC:WMTS )
Hierarchy level
Series

Conformance result

Date (Publication)
2010-12-08
Explanation
See the referenced specification
Statement
The myOcean products depends on other products for production or validation. The detailed list of dependencies is given in ISO19115's aggregationInfo (ISO19139 Xpath = "gmd:MD_Metadata/gmd:identificationInfo/gmd:aggregationInfo[./gmd:MD_AggregateInformation/gmd:initiativeType/gmd:DS_InitiativeTypeCode/@codeListValue='upstream-validation' or 'upstream-production']")
Attribute description
observation
Content type
Physical measurement
Descriptor
vertical level number: 1
Descriptor
temporal resolution: daily mean
Included with dataset
No
Feature types
Grid
File identifier
ac3321fa-94c9-41d4-b95e-5df619fcc584 XML
Metadata language
English
Character set
UTF8
Hierarchy level
Series
Hierarchy level name
Copernicus Marine Service product specification
Date stamp
2025-04-15T13:42:27.005289Z
Metadata standard name
ISO 19139, MyOcean profile
Metadata standard version
0.2
Point of contact
  CMEMS
http://marine.copernicus.eu/
 
 

Overviews

overview
OCEANCOLOUR_MED_BGC_HR_L3_NRT_009_205

Spatial extent

N
S
E
W
thumbnail


Keywords

GEMET - INSPIRE themes, version 1.0
Oceanographic geographical features
Model assimilation
Not Applicable

Provided by

logo
Access to the portal
Read here the full details and access to the data.

Associated resources

Not available


  •  
  •  
  •