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Motivation Approach  building a house Early results Future directions

Assessment of the WRF Model for Use in Regional Predictability Studies Joshua P. Hacker and Dave P. Baumhefner (NCAR). Motivation Approach  building a house Early results Future directions. Why Care?. Understand the capabilities and limitations of a current-generation grid point LAM

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Motivation Approach  building a house Early results Future directions

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  1. Assessment of the WRF Model for Use in Regional Predictability StudiesJoshua P. Hacker and Dave P. Baumhefner (NCAR) • Motivation • Approach  building a house • Early results • Future directions WRF User's Workshop

  2. Why Care? • Understand the capabilities and limitations of a current-generation grid point LAM • Create a stronger foundation for regional predictability studies • To what extent can we treat WRF as a proxy for the real atmosphere? WRF User's Workshop

  3. Mesoscale predictability Resolution Scale interaction Lateral boundaries Building a House WRF WRF User's Workshop

  4. Comparison With Unbounded Model • WRF on hemispheric domain vs. CCM3 • 90 km at 45°N vs. T170 • 10-member ensembles • Perturbations follow Errico-Baumhefner • 6-day forecasts • 4-5 winter 2001-02 cases chosen from different regimes WRF User's Workshop

  5. WRF

  6. CCM3

  7. WRF

  8. Future Directions • Establish a valid perfect-model study region in (resolution, domain, forecast length) space • Observation system experiments • Confident predictability studies of mesoscale phenomena WRF User's Workshop

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