Overview and current status of the Mersea project and system

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Overview and current status of the Mersea project
and system

• Eric Dombrowsky - Mercator Océan

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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 RD modelassim 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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MERSEA Project Participants
Norway met no NERSC Spain
CSIC IEO Turkey IMS UK
NERC-SOC Ocean Numerics PML NERC-POL The Met
Office Univ. Reading Univ. Southampton Internatio
nal ECMWF

• Cyprus
• FDMR
• Denmark
• DMI
• U.E
• JRC
• Finland
• U-HEL
• France
• ASP
• BOOST
• CLS
• CNRS
• Ifremer
• Mercator Océan

• Germany
• AWI
• GeoB
• IFM/Univ. Kiel
• IFM/Univ. Hamburg
• Greece
• HCMR
• Ireland
• Techworks
• Italy
• CNR-ISAC
• CNR-ISSIA
• CoNISMA
• ENEA
• INGV
• OGS

EuroGOOS members Operational agencies or
services providers
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The MERSEA Integrated System, a European
capacity for Ocean Monitoring and Forecasting
Bologna Emilia Romagna Copenhagen Oresund Berge
n Hordaland Exeter Devon Toulouse Midi-Pyrénées
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Area 3 Arctic
Area 4 Baltic
Area 2 North East Atlantic
Area 5 Med Sea
Area 1 Global
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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 TS 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-W 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 TS 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 TS, SST, SSH
• Revisions to mean dynamic topography