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GlobColour

Global Ocean Colour for Carbon Cycle Research

Ocean colour is an essential climate variable needed to support the carbon cycle monitoring requirements of the UNFCCC. It is also a climate variable that cannot be globally monitored without using satellite observations. In order to cover the long time span necessary for climate monitoring purposes, the required ocean-colour data set can only be built by merging together observations made with different satellite systems. Data-merging is also necessary to achieve global daily coverage, as no single sensor is capable of observing every part of the globe every day.

 
Project References
 Name GlobColour
 Title Global Ocean Colour for Carbon Cycle Research
 Programme DUE (Data User Element)
 Theme Glob-series
Ocean
 Cost €1,150k
 Type Service Demonstration
 Status Completed (15/11/2005 - 31/07/2009)
 Sensors ENVISAT : MERIS
EOS-Aqua : MODIS
SeaStar : SeaWiFS
 
Project Description
 Web site http://www.globcolour.info
 Objectives

The aim of the Data User Element GlobColour project was to develop and demonstrate an EO-based service supporting global ocean carbon-cycle research. The project provided scientists with a long time-series of consistently calibrated global ocean colour information, according to requirements specified by the global ocean colour user community, as represented by the user group. GlobColour successfully put in place the capacity to continue the ocean colour service in the future, concluding with service transfer to the EC funded GMES Marine Core Service.

GlobColour demonstrated the production of a merged data set from several different satellite data streams: MERIS, SeaWiFS and Aqua / MODIS. The objective was to combine these data streams in such a way that the output product is as far as possible independent of the input data source.

To achieve this, a characterisation of each sensor's performance was first made, including an analysis of the best available retrieval algorithms. Data-merging methods starting from both radiance and derived bulk properties (such as surface chlorophyll concentration) were tested. The final choice of which merging algorithm to implement was made following an algorithm intercomparison and trade-off analysis. A thorough validation of the final products against in-situ measurements was performed following well defined protocols, such as those developed and demonstrated under the SIMBIOS programme. To show the potential for supporting operational oceanography, the data merging system developed was used to provide a demonstration global NRT ocean colour service based on ENVISAT/MERIS and AQUA/MODIS.

 
 Results Final Report
Validation Report
 
 
Project Consortium
 Prime contractor ACRI-ST : ACRI-ST (Earth Observation - Environment)
 Subcontractors Brockmann Consult Gmbh : Brockmann Consult Gmbh, Germany
DLR - IMF : German Aerospace Centre - Remote Sensing Technology Institute (IMF)
ICESS : Institute for Computational Earth System Science
LOV : Laboratoire d'Oceanographie de Villefranche
NIVA : Norwegian Institute for Water Research
UoP SEOES : University of Plymouth, School of Earth, Ocean and Environmental Sciences
 
User Partnership
 Users IOCCG : International Ocean Colour Coordinating Group
IOCCP : Internation Ocean Carbon Coordination Project
Met Office : Met Office Hadley Centre
 
Contact Points
 Project Manager Odile Fanton d'Andon
ACRI-ST
260, route du Pin Montard - B.P. 234
06904 Sophia Antipolis Cedex FRANCE
Tel: +33 4 92 96 75 03
Fax: +33 4 92 96 71 17
Mail: oha@acri.fr
 Technical Officer Simon Pinnock
European Space Agency - ESRIN D/EOP-SEP
Via Galileo Galilei
I-00044 Frascati (RM)
ITALY
Tel: +39 06 941 80573
Fax: +39 06 941 80552
Email: simon.pinnock@esa.int
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