Three Dimensional SBM in MM5
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Three Dimensional SBM in MM5
• Two Case Studies: • Florida Simulation of Sea Breeze
(7/27/91): Comparison with FTMS, TMIS
• California: Orographic Precipitation Event (7/12/2003)
• Contributors: Alexander Khain, Jimy Dudhia, Danny Rosenfeld, Axel Seifert, and Greg Thompson
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Flow Chart
• Detailed physical processes included in model
• Model solves spectral (bin) microphysical equations
• Thirty three bins • Smallest nucleated droplet is 2
microns/largest is 10 microns• 3 km grid resolution
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Figure1
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Obs: July 27, 1991
Figure 1
Distance (km)
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Figure 2
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Obs
Distance (km)
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ObsSBM MarSBM Con
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ObsSBM MarSBM Con
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Figure 3
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Figure 4: From: # of observations within histogram ban width divided by total number of positive “returns.”
Maritime
Continental
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Figure 5
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Figure 6
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Maritime
Continental
Figure 7
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Maritime Versus Continental Florida Simulations
MaritimeContinental
10LOG(Number)
10LOG(Radius)
Log Num
ber
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Maritime
Continental
Figure 8
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Maritime
Continental
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Figure 9
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ObsFTMS-MarFTMS-IntFTMS-Con
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ObsFTMS-MarFTMS-InterFTMS-Con
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Figure 10
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ObsReisner2TMIS-MarTMIS-IntTMIS-Con
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Figure 11
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ObsSBM-MarSBM-ConFTMS-MarFTMS-InterFTMS-ConTMIS-MarTMIS-InterTMIS-ConTMIS-Mar (Mod)Reisner2
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FTMS Inter.
FTMS Mar.
FTMS Cont.
TMIS Mar.
TMIS-Con.
TMIS-Inter.
Figure 12
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FTMS Mar.
FTMS Inter. TMIS Inter.
FTMS Con.
TMIS Mar.
TMIS Con.
Figure 13
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Figure 14
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SBM-MarSBM-ConFTMS-MarFTMS-InterFTMS-ConTMIS-MarTMIS-InterTMIS-CONGSFCReisner2Schultz
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Figure 15
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FTMS Mar.
FTMS Inter
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Reisner2 Reisner2
Figure 16
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Summary: Part 1:
• SBM is able to reproduce general characteristics of precipitation and storm structure, displaying sensitivity to initial aerosol concentrations
• Bulk models able to reproduce some of the microphysical characteristics, including the TMIS sensitivity of precipitation to aerosol concentration.