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IGST Meeting, St John’s, Newfoundland, Canada – 7-9 August 2007 Kirsten Wilmer-Becker (Met Office, UK) GODAE-IMBER meeting outcomes.

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Presentation on theme: "IGST Meeting, St John’s, Newfoundland, Canada – 7-9 August 2007 Kirsten Wilmer-Becker (Met Office, UK) GODAE-IMBER meeting outcomes."— Presentation transcript:

1 IGST Meeting, St John’s, Newfoundland, Canada – 7-9 August 2007 Kirsten Wilmer-Becker (Met Office, UK) GODAE-IMBER meeting outcomes

2 IGST Meeting, St John’s, Newfoundland, Canada – 7-9 August 2007 1. Introduction 2. Improvement of present GODAE products for IMBER research 3. Improvement of the observing system for ecosystem modelling 4. Use of GODAE products for IMBER research Content

3 IGST Meeting, St John’s, Newfoundland, Canada – 7-9 August 2007 Introduction First GODAE-IMBER workshop, 12-13 June 2007 in Paris Patrick Monfray chaired the meeting 6 GODAE and 6 IMBER representatives were present Review the present biogeochemistry and ecosystem modelling development within GODAE systems Identify common interests between IMBER and GODAE Evaluate real-time datasets and assimilation schemes that will be required for biogeochemistry and ecosystem applications Three areas of importance were identified and will be investigated Improvement of present GODAE products for IMBER research Improvement of the observing system for ecosystem modelling Use of GODAE products for IMBER research

4 IGST Meeting, St John’s, Newfoundland, Canada – 7-9 August 2007 Improvement of present GODAE products for IMBER research Evaluation of GODAE derived vertical fluxes to drive IMBER models - Lack of data constraint for biogeochemical variables - Biogeochemical variables primarily controlled by vertical subsurface processes - Reconsideration of quality of vertical fluxes - Application of smoothers or more advanced assimilation methods Examination of the impact of volume conversation in GODAE products Assessment of the reliability of forcing fields estimated by GODAE systems - Requirement of consistent surface forcing fields - Currently only two GODAE systems provide forcing fields that are consistent with the oceanic state estimates - Recommendation to use these forcing fields along with other products

5 IGST Meeting, St John’s, Newfoundland, Canada – 7-9 August 2007 Improvement of the observing system for ecosystem modelling Optimisation of the current observing system - Development of physical-biological data assimilation methods - Need for new and advanced in-situ and remotely sensed observational data ■ e.g. oxygen, nitrate, carbon (pCO 2, primary production) and inherent optical properties (IOP) ■ Data for boundary conditions - Quantitative assessment of model skill ■ Twin experiments – OSSE/OSE

6 IGST Meeting, St John’s, Newfoundland, Canada – 7-9 August 2007 Use of GODAE products for IMBER research GODAE state variables for IMBER analyses, reanalyses and forecasts - Vertical velocity, vertical mixing, mixed layer depth (MLD) Reconsideration of GODAE systems for IMBER - Bias/error evaluation of the impact of GODAE products on IMBER models - Reconsideration of model/observational covariances of IMBER variables - Advection schemes - Model grid structure Data needs and user requirements (for IMBER) - Model-data validation - Model-model intercomparison - Metrics

7 IGST Meeting, St John’s, Newfoundland, Canada – 7-9 August 2007 Issues pertinent to offline coupling of GODAE products to drive IMBER models (summary of break-out group #2) Important issues: The rapid and nonlinear response of biogeochemistry to the physical state requires high temporal resolution (offline) GODAE products. The advantage of offline coupling may be lost if I/O cost exceeds computational cost of online coupling. Consistency of grid schemes: GODAE models mostly have tracer at center of a grid cell and velocity at the boundaries, which is different from IMBER models.

8 IGST Meeting, St John’s, Newfoundland, Canada – 7-9 August 2007 GODAE-IMBER Working Group established - 12 members (6 GODEA and 6 IMBER representatives) - Nicolas Gruber will probably take over as chair (TBC) Publication - Meeting documents (presentations, minutes, etc.) are available on the GODAE website (http://www.godae.org/GODAE-IMBER-only.html)http://www.godae.org/GODAE-IMBER-only.html - Plan to publish first achievements/recommendations (meeting outcomes) in EOS or BAMS Future - 2-5 year plan is available as draft on web  Vision/strategy plan - Working Group meetings Current achievements and future outlook

9 IGST Meeting, St John’s, Newfoundland, Canada – 7-9 August 2007 Thank you

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