MyOcean2 First Annual Meeting – April 2013 WP 5 MONITORING & FORECASTING CENTRE for the Global Ocean (GLO MFC) MyOcean2 First Annual Meeting – Cork /16-17 April 2013

Work Package Main Objectives Continuously deliver numerical products for the global ocean – Ocean global assimilative models (physics + BGC, Mercator Ocean) – Based on observations only (physics, CLS) – Global reanalysis (produced within MyOcean, physics only, and upgrades decided within WP18) Improve the product quality to better serve users – Upgrade model, assimilation system, … R&D activities Provide boundary data for the regional systems that require them – IBI (operational), MED, NWS, ARC (R&D activities within WP19) Incorporate into the system new functionalities – Adapt to the versions of the system (V3, V4), to the CIS evolutions – Add operational service from the coupled system developed by the Met Office at spring 2014 Implement daily update of short term forecast based on the global 1/12°: V3 MyOcean2 First Annual Meeting – April 2013

MyOcean Close out / MyOcean 2 Kick Off – March 2012 Partnership Met Office PU/DU CLS PU/DU Mercator Océan PU/DU WP 5 Global Ocean MFC Coordination and lead Mercator Océan CLS (Input data, external DU) CNRS (R&D partner) CLS The Met Office

System Evolution (1/2) MyOcean2 First Annual Meeting – April 2013 n Objectives are n To improve the product quality (better product quality  user better served) n Main achievements are n Upgrade of the system delivering services for HR ocean forecast n Is part of the V3 package n Main difficulty encountered n Having Global forecasting system upgrade in phase with the MyOcean versions

System Evolution (2/2) MyOcean2 First Annual Meeting – April 2013 n V3: n implement a new release of the global system at 1/12° n almost finished, service starts on April 23 rd, 2013 (V3) n between V3 and V4 (V3.1) n Upgrade global reanalysis (integration is ongoing) n Upgrade the observation based product (upgrade developed) n Upgrade as required the systems n V4: n Upgrade BGC to increased horizontal resolution (1°  1/4°) n Risky issue n Incorporate coupled ¼° product into the catalogue (developed within WP19 by the Met Office)

Production Evolution MyOcean2 First Annual Meeting – April 2013 n Objectives are: n To simplify the catalogue of products and at the end of MyOII to have: n One system producing HR ocean forecast: the global 1/12° n One system producing LR ocean coupled forecast: the Met Office1/4° n One system delivering products from observations: CLS products 1/3° n Main achievements are n The HR daily forecast products will be delivered using one single system: the Global 1/12° (daily service) n Used to be very complicated: various system were contributing n No more complicated tiling of products (inherited from MERSEA IP) one single 1/12° product is now served and CIS sub setter is available so that the users can get only what they need n Main difficulty encountered n update products only when the catalogue can be updated: need to phase the GLO MFC developments with the MyOcean versioning (V3, V4, …)

One major achievement The transition to global 1/12° is a reality now Daily (7-day forecast ) services ready for V3 1/12° daily products served - one standard horizontal grid (1/12°) - 50 vertical levels - access to those files through the MyOcean subsetter shown here is one snapshot (24 th of July 2009) of surface currents obtained with the global 1/12° without data assimilation

Sea ice extent in the global 1/12° system  improvements: new better (compared to obs) than old Arctic Ocean. V3 (new) is always closer to the obs than V2 (old) Antarctic Ocean. V3 (new) is always closer to the obs than V2 (old) V3 underestimates the min ice extend because heat fluxes are too strong while V2 was over estimating it because of a bad coupling (improved in V3) ice obs not assimilated here (R/T systems),

Deep T (top) and S (bottom) CLIM, OLD NEW  Improvements: new always better than clim and than old Temperature Salinity m m m

Observation based Temperature and Salinity CLIM, OLD NEW  Improvements: new higher spatial resolution and no degradation Temperature (°C)Salinity (psu) Depth (m) RMS over period Temperature (°C) OLD NEW CLIM NEW OLD CLIM NEW OLD  Higher resolution  Good agreement with in-situ data : no degradation

V3 and the GLO MFC For V3, we have produced new versions of a lot of documents : – Project documents The PMP, the SIOPM, the OLA – Technical GLO MFC documents The SRD, the ADD, the SIVP, the VDS – Product scientific quality documents The ScCR, the QUIDS – User documents PUMs, QUIDs – Integration documents Test reports (corresponding to tests described in the SIVP) for each DU – + various other contributions to docs (PDD, compliance matrices, IPST, EPST, …) How to capitalize on this effort and make it usefull for GLO ? All our system changes (the GLO production chain have completely changed for V3) have been up to now coinciding with major MyO versions. We should we think of disconnecting them in the future (goal being to reduce risks).

First period summary and next steps A new release of the global 1/12° system has been developed and is ready for V3 (daily short term forecast service) – Performances (product quality) improved – Products really simplified – Size of the system is challenging Next steps: – succeed in V3 (next week is a major step) – Define, plan and succeed in V3.1 – Prepare V4 (improve BGC horiz resolution  1/4°) – Implement numerical ocean product services from the Met office coupled system at ¼°