1. ESA Project- Coupled Model Assimilation Year 1 workshop Aim: To establish coupled Atmosphere-Ocean assimilation system at ECMWF and demonstrate improved treatment and results from using near surface observations, eg. Satellite SST (CCI), Scatterometer winds,……etc.

2. 2ECMWF Summer Seminars September 2011

4. 4

5. 5 WP 1: Deliverables ● KO + 9 months D1: Workshop report, identifying priorities for coupled data assimilation research. ● KO + 15 months D2 (draft): Draft report on results from experiments with simplified system, including the effect of initialisation shocks in uncoupled data assimilation. ● KO + 24 months D2 (final): Final report on results from experiments with simplified system, including an assessment of the benefit of the different assimilation strategies tested.

6. 6 WP 2: Deliverables ● KO+ 6 months D3/4: System Design and Technical Specification providing a description of the design of the coupled system and specification of the software components needed. Specification of the required tests. ● KO+ 9 months D5.1: Implementation of baseline coupled system CERA-S for long coupled SST-constrained integrations (WP2.2). User documentation. Ready to use in tasks 3 and 4. ● KO+ 15 months D5.2: CERA-A and CERA-O systems completed User documentation. CERA-A ready to use in tasks 3 and 4. ● KO+ 21 months D5.3: Implementation of the CERA system completed and tested over a short period User documentation. ● KO+24 months D5 (final): Implementation report with summary of computational performance.

7. 7 WP 3: Deliverables ● KO+ 9 months D6 (initial): A current reanalysis assessment report identifying case study periods and showing areas where coupled model improvements may be expected ● KO+15 months D7: Documentation for Opensource Visualisation software and demonstrator presenting comparisons between ocean and atmosphere reanalysis products using the observation operator codes developed for assimilation, and observations, particularly near ocean surface, for scientific and outreach use ● KO+24 months D6 (final): An final impact assessment report based on Task 1, WP3.3 and 3.4 studies, describing improved representations of coupled phenomena and improved fitting to observational data.

8. 8 WP 4: Deliverables ● KO+9: Implementation of options in the ocean DA. Report on sensitivities to the ocean DA cycle. (D8.1) ● KO+12: Methodology to constrain SST in CERA-S implemented (D8.2) ● KO+15: Production of a multi-year integration with CERA-S (D8.3). Input to WP3.3 ● KO+18: Production of a set of case studies to evaluate the CERA-A system (D8.4). Input to WP3.3 ● KO+24: Demonstration experiment using a complete CERA system (D8.Final) Input to WP3.4

9. 9 Future: 6 month Plans WP 1 1D Coupled code ● Development of a baseline Variational system. ● Strongly coupled data assimilation experiments (identical twin). ● Exploration of different coupling strategies being implemented in the ECMWF system WP 2 CERA development ● Extend the numerical experiment based on the CERA system --> experiments with only conventional observations --> single-observation experiments ● Implement the SST relaxation in the CERA system ● Improve the current CERA-S relaxation scheme to adapt it to poorly observed periods WP 3 CERA Case studies ● SST fields with perturbations from the "slow" SST fields. ● SST retrieval correlation length scales?? ● Statistical analysis of diurnal cycle cases ● Visualisation of SST case studies WP 4 CERA runs ● Diagnose ocean-atmosphere interactions in the existing 10-year CERA-S runs ● Run longer CERA-S with several ensembles to assess the significance of the signals