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  • METIS-OC Home
  • Data Sources & Method
    • Satellite OC Products
    • Reference OC Fields
    • Regions of Interest
    • Analysis Method
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    • Timeseries Statistics
    • Timeseries Analysis
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Partners & collaborators
Chlorophyll Maps


Statistical Parameters




Central Moment
Ordinate




Abscissa
      
   
      
 
           
METIS-OC, the OC component of Monitoring & Evaluation of Thematic Information from Space (METIS), provides near-real time critical diagnostics of EUMETSAT operational level-2 (L2) Ocean Colour products.

Current Satellite OC Products monitored in METIS-OC are from: Sentinel-3A OLCI, Sentinel-3B OLCI

All analyses are based on OLCI Level2 Collection 3 data. They are stratified based on different levels of pigment concentration into 9 Regions of interest (ROI). (Some regions of optically-complex waters e.g. Río de la Plata still not included in any of the considered ROIs) They are computed from 9km global binned level3, including BRDF correction according to Morel 2002 and Wang 2006.

Latest available Sentinel-3A OLCI Chlorophyll map:

8 Days, Sentinel-3A OLCI OC (click on image to enlarge). For more maps, click here.
Ocean Colour, ρwN 442.5nm, Deep (>=1000m)
8 Days binned mean monitoring of satellite Ocean Colour. For more time-series, click here.
Satellite Ocean Colour retrievals monitored in METIS-OC
Satellite L2 OC Spatial Resolution Production (by provider) Cloud & Quality Flags Document, Data Access & Contact  
Ocean and Land Colour Instrument (OLCI) Level2 - EUMETSAT
Sentinel-3A OLCI

Sentinel-3B OLCI
~1km (nadir) Reduced Resolution
26-Apr-2016

15-May-2018
Recommended flags: See Appendix A of Recommendations for Sentinel-3 OLCI Ocean Colour product validations in comparison with in situ measurements Link   Collection-3 report   Contact
Reference OC data used in METIS-OC and the Match-up Procedure
Reference OC Resolution Time coverage Inputs Further info  
NASA Ocean Biology Processing Group
MODIS Aqua
1km Daily Since Jul-2002 Link 
In situ Ocean Colour measurement
AERONET-OC
 
Points of measurement Since 2006 World-wide network of sun photometric and normalized water-leaving radiance measurements Link  Zibordi et al. 2009, AERONET-OC: A Network for the Validation of Ocean Color Primary Products 
Copernicus OCDB
Points of measurement Several sporadic field campaigns since 2007 In situ database of marine/inland bio-optical measurements Link 
MOBY Points of measurement Since Jul 1997 Autonomous optical buoy measurement for SVC Link 
Oceanic Region of Interest (ROI)
Region of Interest monitored

The map above shows ROIs as describe in section IV of the Methods for Assessing the Quality and Consistency of Ocean Color Products
ID Description
Deep
Eutrophic
Mesotrophic
Oligotrophic
IOS_gyre
NASG_gyre
NPSG_gyre
SASG_gyre
SPSG_gyre
All water with depth greater or equal to 1000m. Shown with the isobath 1000m on the map
Eutrophic waters (Chl >= 1 mg/m3)
Mesotrophic waters (0.1 <= Chl < 1 mg/m3)
Oligotrophic waters (Chl < 0.1 mg/m3) Including covered by the Subtropical Gyres
Indian Ocean Subtropical Gyre
North Atlantic Subtropical Gyre
North Pacific Subtropical Gyre
South Atlantic Subtropical Gyre
South Pacific Subtropical Gyre
Analysis References
Method Reference
Timeseries analysis
Census-X11


X11 analysis are made with X-13ARIMA-SEATS Seasonal Adjustment Program
Reference article: The X-11 Variant of the Census Method II Seasonal Adjustment Program
Monotonic long term change assessment
Mann-Kendall trend test
Yearly evolution (%.yr-1) Based on the slope of Theil-Sen estimator
EUMETSAT in situ validation efforts include:

  • Maintaining and hosting OCDB – the Copernicus’ OC database, containing in situ measurements of OC products.
  • Maintaining and distributing ThoMaS - Tool to generate Matchups of OC products with Sentinel-3/OLCI.
  • Managing the study Fiducial Reference Measurements for Satellite Ocean Colour – Phase 2 (FRM4SOC-2) project, launched by EUMETSAT to expand the Copernicus Fiducial Reference Measurements (FRM) capabilities and ensure the adoption of FRM principles across the Ocean Colour community.
  • Co-managing and contributing to HyperCP (HyperInSPACE Community Processor) with NASA and the HyperCP team. HyperCP is an open, free and publicly available processor for automated and manual, above-water, hyperspectral ocean color radiometry data using state-of-the-art methods and protocols for quality assurance, uncertainty estimation/propagation, sky/sunglint correction, convolution to satellite wavebands, and ocean color product retrieval.
  • Routine assessments of satellite-to-in-situ match-ups with our operational products, using in situ data coming from high quality sources such as AERONET-OC, BOUSSOLE and MOBY. Routine results of such assessment will be soon published in METIS, stay tuned!
EUMETSAT mainOcean Colour Services page

All the documentation for OLCI OC is available on EUMETSAT Ocean Colour Resources page
Region of Interest
Channel of Interest
Channel of Interest
Channel of Interest
Sensor selection
Filtering Option
Aggregation Time
Outlier handling
Product of Interest


Product of Interest



(download png)   (download csv)  


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