GlobColour overview and achievements after two years Globcolour / Medspiration user consultation, Nov. 20-22, 2007, Oslo Session 2 – Progress with the GlobColour Service – November 20, 2007 1 European Service for Ocean Colour User Consultation Meeting (Medspiration-5, GlobColour- 2) GlobColour Overview and achievements after two years Odile Fanton d’Andon (ACRI-ST) Diagram/illustration www.globcolour.info Session 2 – GlobColour Progress 20 November 2007 www.globcolour.info
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GlobColour overview and achievements after two yearsGlobcolour / Medspiration user consultation, Nov. 20-22, 2007, Oslo
Session 2 – Progress with the GlobColour Service – November 20, 20071
European Service for Ocean Colour
User Consultation Meeting (Medspiration-5, GlobColour-2)
GlobColour Overview and achievements after two years
Odile Fanton d’Andon (ACRI-ST)
Diagram/illustration
www.globcolour.info
Session 2 – GlobColour Progress
20 November 2007
www.globcolour.info
GlobColour overview and achievements after two yearsGlobcolour / Medspiration user consultation, Nov. 20-22, 2007, Oslo
Session 2 – Progress with the GlobColour Service – November 20, 20072
European Service for Ocean Colour
User Consultation Meeting (Medspiration-5, GlobColour-2)
Background of GlobColourPhase 1 achievementsPhase 2 achievements Provision of a long time-series
(1997-2007) of consistently calibrated and merged global ocean colour products
Validation and characterisation performed with available in situ observations
Perspective : Pre-operational ocean colour service element of the future EU GMES Marine Core Service
Outline of this presentation
July 2002
October 2002
GlobColour overview and achievements after two yearsGlobcolour / Medspiration user consultation, Nov. 20-22, 2007, Oslo
Session 2 – Progress with the GlobColour Service – November 20, 20073
Satisfy emerging demand for validated merged ocean colour derived information
Demonstrate the current state of the art in merging together data streams from different ocean-colour sensors:
GlobColour overview and achievements after two yearsGlobcolour / Medspiration user consultation, Nov. 20-22, 2007, Oslo
Session 2 – Progress with the GlobColour Service – November 20, 200711
GlobCOLOUR ProjectEuropean Node for global Ocean Colour
• Data access• Data products• Methods• Data tools• Calendar• About the Project• Workshops and forum
WWW.globcolour.infoThe European Service for Ocean ColourGlobColour is an ESA Data User Element Project
The GlobColour project is demonstrating an EO based service supporting global ocean carbon cycle research. Through this web portal, the project provides scientists with a long time series of consistently calibrated global
ocean colour information.
GlobColour overview and achievements after two yearsGlobcolour / Medspiration user consultation, Nov. 20-22, 2007, Oslo
Session 2 – Progress with the GlobColour Service – November 20, 200712
Merging recommendations:
Normalized water-leaving radiances:- Statistics are slightly better when using the weighted average than the simple average- Use of the weighted average for the nLw’s
Chlorophyll:- GSM01 provides the best fit to in-situ chlorophyll- It has the advantage of providing other products- Pixel-by-pixel error bars can be provided in the future
- Produce also weighted average Chlorophyll
CHL2 AVG Apr03
CHL1 GSM Apr03
Phase 1 (2006) : Demonstration of feasibility
GlobColour overview and achievements after two yearsGlobcolour / Medspiration user consultation, Nov. 20-22, 2007, Oslo
Session 2 – Progress with the GlobColour Service – November 20, 200713
Phase 1 (2006) Demonstration of feasibility successfully achieved
Presentation of the precursor serviceFirst user’s workshop at LOV, Villefranche, 4-6 Dec. 2006
GlobColour overview and achievements after two yearsGlobcolour / Medspiration user consultation, Nov. 20-22, 2007, Oslo
Session 2 – Progress with the GlobColour Service – November 20, 200714
1997-2007 time series available at http://www.globcolour.info
Phase 2 (2007) : Generation and validation of 10 year time series
Phase 2 (2007) Provision of a long time-series (1997-2007)
SeaWiFS
MODIS
MERIS
97-09 07-12see Gilbert Barrot’s presentation
GlobColour overview and achievements after two yearsGlobcolour / Medspiration user consultation, Nov. 20-22, 2007, Oslo
Session 2 – Progress with the GlobColour Service – November 20, 200715
Global ocean colour data set at 4.6 km resolution covering 1997-2007 daily, weekly, monthly products:
GlobColour overview and achievements after two yearsGlobcolour / Medspiration user consultation, Nov. 20-22, 2007, Oslo
Session 2 – Progress with the GlobColour Service – November 20, 200716
Some numbers..
More than 25 Tb of input data (level 2)14 Tb of intermediate and output products4.5 Tb of distributed data
netCDF, JPG/PNG
web, ftp, Google-Earthdedicated tools are available(ISIN-PC grids)
All Google Earth tools are available (e.g. ruler, places name…)
Phase 2 (2007) Provision of a long time-series (1997-2007)
GlobColour overview and achievements after two yearsGlobcolour / Medspiration user consultation, Nov. 20-22, 2007, Oslo
Session 2 – Progress with the GlobColour Service – November 20, 200717
Applying the Validation protocol defined in Phase 1
Using: •punctual in situ measurements and •time series obtained from long-term buoy measurements or from regular/ continuous cruises (e.g. ferrybox datasets)
Validation of FPS merged products: •Focus on chlorophyll-a, diffuse attenuation coefficient, normalised water-leaving radiances (LwN). •Perspectives on error uncertainties (See A. Mangin/S. Maritorena talks)
Phase 2 (2007) Validation
GlobColour overview and achievements after two yearsGlobcolour / Medspiration user consultation, Nov. 20-22, 2007, Oslo
Session 2 – Progress with the GlobColour Service – November 20, 200718
Open ocean : see David Antoine presentation
Phase 2 (2007) Validation
- Based on the match up with the global data set of field data (Chl and nLw’s), the GlobColour FPS is validated.
- The GlobColour FPS is definitely qualified and usable for operational uses, such as assimilation into global models (there is a pixel-by-pixel error bar delivered with the GSM Chl), or delivery of GMES services.
N 175R2 0.84RMS 0.21BIAS 0.04
N 162R2 0.90RMS 0.19BIAS -0.04
N 108R2 0.84RMS 0.14BIAS 0.01
GSMAVWError characterisation
GlobColour overview and achievements after two yearsGlobcolour / Medspiration user consultation, Nov. 20-22, 2007, Oslo
Session 2 – Progress with the GlobColour Service – November 20, 200719
Phase 2 (2007) Validation
Coastal waters : see Dominique Durand presentation
• A better in-situ dataset for coastal case 2 waters is needed (best results from Ferrybox data collection)!
•GSM01 merging algorithm seems quite robust over coastal waters
•GlobColour merged products show a potential for investigating seasonal to inter-annual variability in coastal zone: should be investigated further !
NIVA-FerryBox CHL monthly mean
GlobColour overview and achievements after two yearsGlobcolour / Medspiration user consultation, Nov. 20-22, 2007, Oslo
Session 2 – Progress with the GlobColour Service – November 20, 200720
Inter-comparison with other similar initiatives (NASA, REASoN) : see Stephane presentation
Phase 2 (2007) Validation
GlobColour overview and achievements after two yearsGlobcolour / Medspiration user consultation, Nov. 20-22, 2007, Oslo
Session 2 – Progress with the GlobColour Service – November 20, 200721
Quality control and uncertainty estimation
Add SensorErrorFrom
Charact.& anc. data
GlobColourThe global OC data service in the European Marine Core Service
Parallel & consistent with the Medspiration/GHRSST approach
L3 Products
per sensor
net
CD
F f
orm
at
Input L2 data of Varied format
& with no errors estimates
MergedProducts with error estimates
net
CD
F f
orm
atDatamerging
Observations ApplicationsSee session 4 tomorrow
GlobColour overview and achievements after two yearsGlobcolour / Medspiration user consultation, Nov. 20-22, 2007, Oslo
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Thank youfor yourattention
http://www.globcolour.info/
GlobColour overview and achievements after two yearsGlobcolour / Medspiration user consultation, Nov. 20-22, 2007, Oslo
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Monthly ChlorophyllMay 2006
GlobColour overview and achievements after two yearsGlobcolour / Medspiration user consultation, Nov. 20-22, 2007, Oslo
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