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GlobColour Overview and achievements after two years. User Consultation Meeting (Medspiration-5, GlobColour-2). European Service for Ocean Colour. www.globcolour.info. Odile Fanton d’Andon (ACRI-ST). Diagram/illustration. Session 2 – GlobColour Progress 20 November 2007. - PowerPoint PPT Presentation
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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:
MERIS (ESA), SeaWiFS (NASA), MODIS-AQUA (NASA), (Polder-Parasol CNES)
ESA DUE project i.e. driven by end users: IOCCG, IOCCP,UK Met-Office, …
Context
Objectives
Background of GlobColour
Provide a long time-series (10 years) of ocean-colour information
Demonstrate a global NRT ocean-colour service based on merged satellite data
Put in place the capacity to continue production of such time series inthe future and to prepare for full exploitation of Sentinel 3 (ESA)
GlobColour overview and achievements after two yearsGlobcolour / Medspiration user consultation, Nov. 20-22, 2007, Oslo
Session 2 – Progress with the GlobColour Service – November 20, 20074
CONSORTIUM
ACRI-ST (France) Prime contractor / managementProcessor / Production
University of Plymouth (UK) User requirements follow up/
design justification / merging
ARGANS LIMITED (UK) New products / Evolution /merging
NIVA (Norway) Validation (DDS)
Brockman Consult (Germany) Tools developmentWeb server
ICESS (USA), DLR (Germany) & LOV (France)Scientific support
Background of GlobColour
ARGANS
GlobColour overview and achievements after two yearsGlobcolour / Medspiration user consultation, Nov. 20-22, 2007, Oslo
Session 2 – Progress with the GlobColour Service – November 20, 20075
GlobColourDUE project – 3 years - 3 phases
Phase 1 (2006) : Demonstration of feasibility
Today : Second GlobColour User consultation at NIVA
Phase 2 (2007) : Generation and validation of 10 year time series
Phase 3 (2008) : Daily delivery of global merged ocean colour products
NRT demonstration
Delivery to operational oceanography user community
Background of GlobColour
Towards a sustainable European Ocean Colour service part of the future EU GMES Marine Core Service
GlobColour overview and achievements after two yearsGlobcolour / Medspiration user consultation, Nov. 20-22, 2007, Oslo
Session 2 – Progress with the GlobColour Service – November 20, 20076
Users are always involved during the project for consultation, advice andfinal assessment
User meeting at University of East AngliaKO+20: July 2007
User meeting at UK Met OfficeKO+16: Mar. 2007
Participation in the GlobColour User Workshop 3 (ESRIN)KO+36: Nov. 2008
Participation in the GlobColour User Workshop 2 (NIVA)KO+24: Nov. 2007
User assessment of the Final Product Set (10 years)KO+23: Oct. 2007
Participation in the end of phase 1 review (advisors to ESA) and GlobColour User Workshop 1 (LOV)
User assessment of the Preliminary Product Sets (radiance and biophysical) and selection of final product
KO+13: Dec. 2006
Participation in the Critical Design ReviewKO+8: July 2006
Generation and review of Requirements Baseline Document, Design Justification File, and Validation Protocol
KO+2: Jan. 2006
User’s involvement Background of GlobColour
GlobColour overview and achievements after two yearsGlobcolour / Medspiration user consultation, Nov. 20-22, 2007, Oslo
Session 2 – Progress with the GlobColour Service – November 20, 20077
Difficulties
Sensors are not created equal: different designs, calibrations, algorithms, accuracies,….
Large volumes of data to deal with
Merging procedure should not create
biases, discontinuities, artifacts,…
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, 20078
Sensor characterisation (continued in Phase 2)
For validation / characterisation: DDS: Diagnostic Data SetData Courtesy
SeaPRISM [Giuseppe Zibordi, Brent Holben, Doug Vandemark]
Phase 1 (2006) : Demonstration of feasibility
see Samantha Lavender’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, 20079
Phase 1 (2006) : Demonstration of feasibility
Sensor characterisation (continued in Phase 2)
Achievement: Statistical uncertainties have been derived and
are used for merging
GlobColour overview and achievements after two yearsGlobcolour / Medspiration user consultation, Nov. 20-22, 2007, Oslo
Session 2 – Progress with the GlobColour Service – November 20, 200710
Main modules:
Data acquisition Pre-processing Spatial binning Temporal binning Merging QC
MERISL2
SeaWIFSOcean color L2
AquaOcean color L2
ParasolOcean Color L2
Preprocessing Preprocessing Preprocessing Preprocessing
(1) Spatial binning
(2) Temporal binningin daily mode
(3) Merging
(4) Temporal binningin periodic mode
MERISL3 track
SeaWIFSL3 track
MODIS/AquaL3 track
ParasolL3 track
MERISL3 daily
SeaWIFSL3 daily
MODIS/AquaL3 daily
POLDEROcean Color L3d
Daily merged4.63km/0.25°/1°/QL
8-days4.63km/0.25°/1°/QL
Monthly4.63km/0.25°/1°/QL
DDS L2Sensor (4.63km)
DDS L3Merged (4.63km)
DDS L2Sensor (1km)Diagnostic
sites table
Level 3 data archive
Level 2 data archive
DDS data archive
Daily level 3 data cache
DDS L3Sensor (4.63km)
Developing the system Globcolour processor
End 2006:
System is ready for systematic production
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, 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:
•Chlorophyll concentration (Chla)•Diffuse attenuation coefficient @ 490nm (Kd490)
•Total Suspended Matter•CDM absorption (aCDM443)•Particle backscattering coefficient (bbp443)•Aerosol Optical Thickness (T865)•Exact normalised water-leaving radiance @ 412, 443, 490, 510, 531, 555, 620nm•Water-leaving radiance @ 670, 681, 709nm•Data quality flags •Cloud fraction •Excess of radiance at ~ 555 nm (turbidity index) (EL555) •Error estimates per pixel for each layer
MODIS-only, MERIS-onlysee Gilbert Barrot’s presentation
Phase 2 (2007)GlobColour products (1997-2007)
distributed to the users
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
Session 2 – Progress with the GlobColour Service – November 20, 200722
Thank youfor yourattention
http://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, 200723
Monthly ChlorophyllMay 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, 200724
Error estimates at pixel level (%)Chla – May 2006
100%
50%
0%
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