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Improvements to SAR models

Improvements to SAR models. Dr Øyvind Breivik Norwegian Meteorological Institute. Improved wind and currents. Winds Higher resolution – 4 km near rugged coastlines and in fjords, bays and estuaries to resolve topographic effects Currents

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Improvements to SAR models

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  1. Improvements to SAR models Dr Øyvind Breivik Norwegian Meteorological Institute

  2. Improved wind and currents • Winds • Higher resolution – 4 km near rugged coastlines and in fjords, bays and estuaries to resolve topographic effects • Currents • Higher resolution – 1 km for fjords, bays and estuaries • HF currents and the STPS

  3. 300 m resolution ocean model

  4. Errors and uncertainties • Errors and uncertainties • Assessing the relative importance of uncertainties in wind, currents and drift properties • Ensemble winds (ECMWF 51) • Random flight – autocorrelated wind and current perturbations

  5. Alternative strategies • Currents switched off for very high resolution simulations? • Inverse leeway for backtracking from debris

  6. Improved taxonomy • Redo older leeway categories with new field methods • Refine the taxonomy for different parts of the world – in close collaboration with RCCs

  7. ECMWF 51

  8. ECMWF 51

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