1. Marine Core Service MY OCEAN WP 11 Sea Level Thematic Assembly Center

2. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma Organisation Breakdown Structure and Partnership Coordination CLS Coordination CLS IMEDEA DTU LEGOS Development Maintenance Operation System Engineering Service Cal/Val R&D Cal/Val R&D

3. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma SL TAC main objectives To integrate the pre-existing SSALTO/DUACS system (CNES/CLS) into the MyOcean System and Service n Address progressively the users needs  covering all the MyOcean regions n To improve the assessment of the SL TAC products Version 1 Version 2 MyOcean Annual meeting, 27-28 april 2010, Exeter

4. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma n System&Service and Production: Priority to the integration into the MyOcean System (PDR, AR) Finalise the organisation of the Service Take into account within MyOcean all the existing users Deliver the V0 and V1 products: NRT black sea, REP global, med, black sea Be ready to integrate Cryosat 2 (by 2010) and AltiKa (beginning 2011) Be ready to integrate Jason-1 EoL and Envisat new orbit missions n R&D and CalVal activities Development of new products: Arctic and West Shelves (version2) TAPAS (tailored products for assimilation) initiative Refine the KPI indicators Synergy with in-situ data Scientific validation of the SL products MyOcean Annual meeting, 27-28 april 2010, Exeter Reminder:SL TAC objectives for year 2

5. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma Dev. & Maintenance n Implementation the MyOcean Version 1 Reviews of June (PCDW) and September (AR) Documentation: PMP, SRD, ADD, SIOPM, etc … n System: New processing chain for Black sea product generation New format (netcdf-CF compliant) Implementation of MIS-Gateway for interfacing with the MyOcean central system + others evolutions/corrections/improvements MyOcean Annual meeting, 27-28 april 2010, Exeter

6. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma n History of the version before MyOcean version 1 - V9.3 installed (08/07/2010) : new MDT (MDT_CNES-CLS09), new corrections (new LWE corrections, new mean profiles,…)… - V10 installed (november 2010): correspond to the release of MyOcean Version1, and processing of EnVISAT on its new orbit n History of the version since the beginning of MyOcean version 1 : - V10.0.2 installed (01/03/2011) : improvement of the netcdf format, update use of flag (RT/NRT)… - V10.1.0 installed (29/03/2011): change processing of small tracks in regional chain, Dev. & Maintenance

7. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma Dev. & Maintenance n Service: A Version 1 Service Organisation was set up: based on existing organisation (AVISO)  significant improvement with a better definition of the different roles MyOcean Annual meeting, 27-28 april 2010, Exeter ActorIdentity Product Expert (*) Contact: MI.Pujol Done by: CLS’ Altimetry Cal/Val team Backup by: CLS’ Altimetry Cal/Val team Product Manager Done by: S.Labroue Backup by: Y.Faugere Scientific Expert Done by: G.Dibarboure Backup by: MI.Pujol, Y.Faugere System Evolution Developer Done by: F.Briol Backup by: CLS’ Space Oceanography Division Developers System Maintenance Developer (*) Done by: F.Briol Backup by: G.Dibarboure, CLS’ Developer Team IT Support Operator (*) Contact: P.Roumegoux Done by: CLS’ Operational IT Support Team Backup by: CLS’ Operational IT Support Team Service Desk (*) Contact: V.Rosmorduc Done by: AVISO Service Team Backup by: AVISO Service Team Support Operator (*) Done by: MH.Calvez Backup by: G.Pontonnier, CLS/DT/SOO Team, F.Briol Change Manager Done by: S.Labroue Backup by: Y.Faugere Incident Manager (*) Done by: F.Briol Backup by: G.Dibarboure, Y.Faugere, S.Labroue, MI.Pujol Service Manager Done by: A.Delamarche Backup by: S.Labroue, V.Rosmorduc DUACS/AVISO MyOcean To be all together in MyOcean was an opportunity to become better …

8. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma Users Main challenge: Transition of the MyOcean V0 users towards MyOcean V1 products and access (web portal, MIS): - Existing users (AVISO): We have worked to define a way to count them as MyOcean users and on the harmonisation of the AVISO and MyOcean license - MyOcean version 0 users: More work is required to support and accompany the existing MyOcean Version 0 Users in their migration towards MyOcean version 1. Similarly to the external users, we also need to support the MFCs. Difficulties: Change the habits  support from us is really needed.

9. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma Production Service to EEA Pre-processing and QC Common for global and regional Different tuning for global and regional and NRT and REP/DT CalVal group Internal use External users

10. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma Production Reprocessed DT NRT(RT) RT on the fly daily basis  J1, J2- ENVISAT (OGDR, IGDR) Every 2 years Input data: reprocessed L2 (common standards)  a total of 55 years of data (T/P, Jason1/2, ERS-1/2, ENVISAT, GFO) 3 to 6 months basis Objective to complete the REP time series with more accurate data  J1, J2- ENVISAT (GDR) On the fly basis  J1, J2- ENVISAT (OGDR) 1991 01/09/2010 01/12/2010

11. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma Cal/Val activities n A routine monitoring of the state of the altimeter observing system was set during the first year n Continue to refine the algorithm in order to better represent the main events Delivery of ScCR, ScVR Mono-mission Multi-mission

12. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma Near Real Time constellation frail due to the extension of the nominal duration of the ENVISAT and Jason-1 missions Jason-1 extension of life accepted (but will be re-discussed this year) ENVISAT on drifting orbit since november 2010 Jason-2 : Nominal Cryosat2 (04/2010): a study has been performed to analyse the potential of data. It was presented during the Croysat2 workshop (feb, ESRIN/ESA) Altimeter observing system status

13. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma - Extracted from the presentation “Cryosat2 : a mission of opportunity for MyOcean and oceanography, from theory to practice “ - Cryosphere mission  less accurate for ocean Data are not repetitive less accurate (no radiometer, Ku band only) Mesoscale sampling not optimal Cryosat2, an opportunity for MyOcean

14. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma Main conclusions of the study:  Cryosat2 data quality is satisfying  Cryosat2 can help to mitigate the upcoming loss of ENVISAT or Jason1  Unfortunately Cryosat2 data will probably be unavailable for ocean applications in 2011 due to budget limitations and clear priority of the mission for cryosphere studies. Cryosat2, an opportunity for MyOcean

15. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma Altika (India, launch planed not before end of 2011) data are crucial to maintain the level of accuracy of the NRT products (3 altimeters is the minimum to resolve mesoscale in NRT) HY2 (China, mid-2011): but no data before mid-2012, no information about the data policy (probability that the data will not be available) Sentinel-3 (end of 2013): but no data during the first 18 month of the mission. Jason-3 (end of2013) : GOCE : will indirectely allow to provide new Mean Dynamic topography Altimeter observing system status

16. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma R&D and CalVal activities n Development of the regional products Arctic product (CLS/DTU) West shelves product (CLS/LEGOS) n TAPAS initiative : Tailored products for assimilation n Improvement of altimetry processing and validation synergy with in-situ data multimission processing  delay due to not enough confidence on the stability at long term

17. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma TAPAS: New generation of along track product n The TAPAS « Tailored Altimeter Products for data Assimilation Systems » initiative was launched in April, 2010 through a workshop gathering the MyOcean MFCs assimilation teams and the SL TAC. n During these 2 days, fruitful exchanges about the contents of the standard altimeter products, their resolution (filtering) and sub-sampling as well as HF atmospherical corrections led to a consensus on several DT altimeter dataset to be tested in assimilation systems. n Two along-track test datasets based on Delayed-Time products were decided and delivered in 2010 on global ocean: Version-1 with no filtering, nor sub-sampling (1993-2009) Version-2 similar to version-1 but with Long-Wave-Errors Correction, Tide correction and DAC provided (2008-2009)

18. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma TAPAS V1: higher-resolution SLA along Track 163 cycle 221 -Jason1 TAPAS V1 CLASSIC

19. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma n Good start with the workshop but difficulties to maintain the energy and the will to work on this transversal R&D activities n Need to have a clear and common work plan  To be identified for MyOcean2 n Objective/wish: to have some results and hopefully specification for an implementation in MyOcean2 TAPAS status in 2011 MFCTAPAS product Planning WP8 - IBIROOSV1 V2 Done in 2010, To be reproduced in 2011 WP4 - GlobalV1Planned in 2011 WP9 - Med SeaV1 & V2In 2011 (REALS) WP10 - Black SeaV1Best effort (TBC) WP5 - ArcticV2Best effort WP7 - NW ShelvesV1Best effort (TBC)

20. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma MyOcean Annual meeting, 27-28 april 2010, Exeter n Context : Lower data quality (unperfect corrections, no reference missions (<66°) Low data coverage (Envisat, ERS and GFO missions only northward of 66°, no data northward of 82°, Seasonally variable sea ice coverage) n Study has been done to define a regional processing change in geophysical corrections - Use of MSS DNSC08 (vs CLS01V1) - Use of TPX07.2 tide model (vs GOT00v2) regional estimation of the mission bias Arctic products

21. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma n A long time series has been generated (1992-2009) - specifications will be used for the NRT implementation Arctic products

22. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma StationsResults RMSe (m) Temporal correlation coefficents 1.Ammassalik0.17490.1650 2.Andenes0.11790.6852 3.Honningsvarg0.10400.7256 4.Lerwick0.10200.6111 5.Maloy0.11780.6422 6.Ny-Alesund0.10440.2906 7.Qaqortoq0.11150.4919 8.Reykjavik0.10400.2609 9.Rorvik0.12410.6682 10.Scoresbysund0.16730.4611 11.Stockholm0.09190.8903 12.Vardo0.11600.6959 - Quality Control Arctic Tide gauges used for the QC of the SL TAC products. Comparison on weekly timescales in Difficult Icecovered region. A lower latitudes high correlation > 0.90 is found for MyOcaen products (excellent) Arctic products - Assessed by DTU

23. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma (IMEDEA) JASON-1/2 Tide gauges SSH corrected by HIRLAM (20 days Filtered Along-track altimetry (NRT) VS TG Good TG-altimetry agreement (corr >0.8 with J1/J2)... OPTIMAL INTERPOLATION Several tests (Grid definition, Spatial / temporal correlation scales, error covariances …)

24. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma Comparison wih gliders (IMEDEA) current Very good Glider-altimetry current agreement (corr>0.8)... … but differences depending on retracking and corrections used (Sensitivity to retracking : 3.2 cm/s rms, to corrections : 2.0 cm/s rms) CB Main surface currents with various retrackingwith various corrections References Bouffard et al., JGR 2010. Bouffard et al. Prog. Ocean. submitted. n Objective: Develop a methodoloy of comparison between altimetry and Glider for cross validation and mesoscale characterisation ENVISAT; JASON-1/2; JASON-1 (new orbit) Intensive observational program of 14 glider missions in the Balearic Sea, along altimetric tracks ( July 2007 - June 2010 n Results: illustration Jason-2 vs Glider

25. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma Characterisation of mesoscales dynamics LEGOS regional/coastal altimetry data : specifically tuned regional dataset, (CTOH/X-track, Roblou et al.,2010] Period [2004-2005] 4 satellites -1- Mesoscale variablity from Wavelet Analysis done on along track data -2- Spatial evolution of mesoscale dynamics offshore onshore transition on the properties Westward increase of observed lengths and amplitudesEastward increase of climatological R d and nb. of eddies Greatest values of R d in the Bay of Biscay around 45°N amplitudes scales Nb.of eddies Internal Deformation Radius (R d ). Chelton et al, 1998. Maps lengthscale limit 60 20 0 50 160 0 110 West Shelves products

26. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma West Shelves products 1) use of the results of the scale analysis shown in section 1a, 2) the improved data provided by the X-TRACK coastal processing software. Feasability on fine scale mapping

27. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma Futur work and Challenges n On going activities System/Service/Production: maintenance/evolution/correction, delivery the version 1products n Service: - Priority to the Users support for the migration towards version 1 (include MFCs) n System: - Prepare and implement the Version 2: Arctic and west shelves products - Continue to be on the desk to optimise the use of the available altimeter missions n R&D: - Improve the coordination within the SLTAC and between TAC and MFC - TAPAS outcome  specification for implementation during MyOcean2 - Synergy between altimetry and in-situ : comparison and combination (tide gauge) n Risks: - loss of altimeters (ENVISAT, Jason 1)

28. Marine Core Service MyOcean AR2 meeting 27-28 april - Roma Calendar Past n Tapas meeting (april 2010) n MyOcean science days n Reviews (PCDW, AR) n Participation to different meetings(EGU, etc…) Future n Internal SL TAC meeting (june2011, Palma) Status on the R&D activities and choice of the specifications for Arctic and West Shelves NRT implementation n TAPAS meeting (TBC) n Acceptance review for version 2 (september 2011)