Parameterizations of Microphysical Processes for Simulation of Regional-Scale Clouds
Conference
·
OSTI ID:5609842
- Argonne National Laboratory (ANL), Argonne, IL (United States)
Cloud physics parameterizations are comprehensively reviewed to examine their theoretical bases and to evaluate their applicability to mesoscale modeling. The constant distribution functions of hydrometerors assumed in previous work are found to be unrealistic. New parameterizations are developed for mixing ratios of water vapor, cloud water, rainwater, cloud ice, graupel, and snowflakes. Equations are derived from theoretical considerations and multiple regression applied to results of simulations with a cloud model that incorporates sophisticated treatments of microphysics and dynamics. In the detailed simulations from which they were derived, the parameterizations generally give better results than do the existing parameterizations tested. In a Lagrangian air parcel model under variable atmospheric conditions, the new parameterizations give consistent results and are computationally more efficient than previously available formulas.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5609842
- Report Number(s):
- ANL/CP--73289; CONF-9107142--1; ON: DE91015554
- Country of Publication:
- United States
- Language:
- English
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