Overview and current status of the Mersea project and system
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Transcript of Overview and current status of the Mersea project and system
Overview and current status of the Mersea project and system
Eric Dombrowsky - Mercator Océan
IGST-12 - St John's - August 2007
The MERSEA Integrated Project
Development of a European system for operational monitoring and forecasting of the ocean physics, biogeochemistry, and ecosystems, on global and regional scales
A European Commission FP6
Project (Space-GMES)
4-year project (2004 –2008)
38 contractors, 16 countries
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Work Breakdown Structure
13 workpackages:– WP1 coordination: IFREMER,
France– 3 WPs dedicated to input data– 2 WPs for system design and
assessment, and for information system activities
– 2 WPs for R&D: model+assim and evaluation
– 2 WPs for implementation and production including downscaling
– 2 WPs for service and demonstrations: special focus experiments and user involvement: oil and gas industry, ship routing and waves, oil spill drift
– WP13: overall asessment
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Cyprus FDMR
DenmarkDMI
U.EJRC
FinlandU-HEL
FranceASPBOOSTCLSCNRSIfremer Mercator OcéanMétéo France
[+ Canada :] DFO
GermanyAWIGeoBIFM/Univ. KielIFM/Univ. Hamburg
Greece : HCMR
Ireland : Techworks
Italy : CNR-ISACCNR-ISSIACoNISMAENEAINGVOGS
Netherlands : MARISUniv. Utrecht
Norway : met noNERSC
Spain : CSICIEO
Turkey : IMS
UK : NERC-SOCOcean Numerics PMLNERC-POLThe Met OfficeUniv. ReadingUniv. Southampton
International : ECMWF
EuroGOOS members Operational agencies or services providers
MERSEA Project Participants
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Bologna Emilia Romagna
CopenhagenOresund
BergenHordaland
ExeterDevon
ToulouseMidi-Pyrénées
The MERSEA Integrated System, a European capacity for Ocean Monitoring and Forecasting
NEA -NorthNW Shelves
ARCTIC
BALTIC SEA
MED SEA
GLOBALNEA - South
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Area 1Global
Area 2: North East Atlantic
Area 5Med Sea
Area 3Arctic
Area 4Baltic
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Mersea Development
We are currently in the Target Operational Period #2: TOP2– 6 month period starting in April 2007
System has evolved from V0 (start of the project) to V1 for TOP1 (Oct 2005), and to version 2 for TOP2, final version 3 will be completed in April 2008
– V0 was the preexisting “patchwork” (Apr 2004)– V1 transformed this “patchwork” into a “network” (Oct 2005)
• Scientific improvements• Coordination of validation activities• Sharing of tools and expertise• Development of the information management system• Links to users through development and demonstration of services
– V2 made it evolve towards an real integrated system (Apr 2007)• Downscaling from global to regions with boundary data provision• Links to common data providers• More homogeneous data delivery
– V3 is the target fully integrated system (Apr 2008)• Full integration from global to regions• Links to users through services• Starting point for MyOcean
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NERSC Arctic system Version v.2: content and status
HYCOM 11-16 km configuration with sea-ice model for Arctic and North Atlantic
– Weekly operation
– analyses & 14-day forecasts
Ensemble Kalman filter assimilation scheme– Uses altimeter data, SST and sea-ice concentration & drift data
– Does not use in situ T&S profile data
Further development of v.2 for v.3 – Work on nesting of TOPAZ into global Mersea system has started
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NERSC Arctic system Developments for version v.2
Agreement between NERSC and National Meteorological Institute: Terms and conditions of operations of TOPAZ at Met.No. Concluded 30 March 2007
Ice drift velocity data assimilation implemented
Higher horizontal resolution: 11-16 km replacing 18-36 km
Ecosystem simulation shown to be relatively insensitive to assimilation of altimeter data
Port of system to new super-computer
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DMI Baltic system Version v.2: content and status
3NM North Sea & 0.5 NM Danish Strait configurations– DMI version of BSH c-mod ocean & sea-ice model
– Three configurations coupled by two-way nesting Twice daily operation
– forecasts to 60 hours ahead SST assimilation scheme
Lateral boundary data in North Sea from climatology
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DMI Baltic system Developments for version v.2
Increased resolution – Doubled horizontal resolution and improved vertical resolution– North Sea grid spacing: 3NM (5km) in horizontal; 2 m in vertical– Danish Straits grid spacing: 0.5 NM (900 m); 1 m
Mixing parameterizations– Horizontal dissipation revised to avoid current divergence– K-vertical mixing scheme represents breaking surface & internal waves– Much sharper pycnocline obtained at some stations
Attempted to use lateral boundary data from north-east Atlantic– Problems because of differences in bathymetry in Norwegian Trench (recall that
models use s-coords and hence are smoothed) SST data assimilation implemented
– uses simplified Kalman filter (Larsson et al 2007) System optimized for AMD Opteron computer
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INGV Mediterranean system Version v.2: content and status
1/16o, 72 level configuration (with revised Atlantic domain)– NEMO ocean models with 72 layers
Daily forecasts and weekly analysis updates– 10-day forecasts
Multi-variate 3D variational assimilation scheme– Uses in situ T&S profile data & SST analysis
– Uses SSH data with revised Rio MDT Nesting into to global system
– Mechanics for nesting in global model have been set up
– A parallel version is run nested in v.2 global
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INGV Mediterranean system Developments for version v.2
Converted ocean model from OPA 8.1 to NEMO
Preparations to nest within Mercator global system
New assimilation scheme– multi-variate 3D variational scheme (with some novel approaches)
– Uses in situ T&S, SST, SSH
Revisions to mean dynamic topography