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 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