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Gaps and Limitations in Atmospheric Modeling of the Water Cycle

Gaps and Limitations in Atmospheric Modeling of the Water Cycle. Minghua Zhang Stony Brook University, SUNY. The Scales. The Dynamics. (Williamson 2006) . ( Nastrom and Gage 1985) . SMET. CAM4. Rainfall Frequency at ARM TWP. 12 UTC July 23, 2002. 21 UTC July 23, 2002.

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Gaps and Limitations in Atmospheric Modeling of the Water Cycle

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  1. Gaps and Limitations in Atmospheric Modeling of the Water Cycle Minghua Zhang Stony Brook University, SUNY

  2. The Scales

  3. The Dynamics (Williamson 2006) (Nastrom and Gage 1985)

  4. SMET CAM4 Rainfall Frequency at ARM TWP

  5. 12 UTC July 23, 2002 21 UTC July 23, 2002 (Lombardo et al. 2012)

  6. WRF (2km) Radar (Lombardo et al. 2012)

  7. Precipitation mixing ratio (Lombardo et al. 2012)

  8. 1. The range of spatial and time scales of precipitation far exceeds what current models can describe. Yet, features at these scales are important to the water cycle. Two possible approaches: Parameterization: unproven, and unlikely succeed High resolution: how high?

  9. 2. The Processes

  10. 00 UTC December 14, 2001 WRF (24 hr) NCEP (Colle et al 2008)

  11. Mixing Ratio of Cloud liquid Cloud Ice Precipitation SUNYSB Microphysics Thompson Microphysics (Colle et al 2008)

  12. 2. Some of the key processes are still not characterized. Yet, these processes are important to the water cycle. Therequirements: More comprehensive observations Knowledge on the asymptote of these processes

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