three dimensional sbm in mm5 two case studies: florida simulation of sea breeze (7/27/91):...
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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
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
Figure1
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Obs: July 27, 1991
Figure 1
Distance (km)
Figure 2
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Obs
Distance (km)
-0.1
0
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16 18 20 22 24
ObsSBM MarSBM Con
Time (GMT)
-1
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16 18 20 22 24
ObsSBM MarSBM Con
Time (GMT)
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
0
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0 5 10 15 20 25 30 35
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
Figure 9
0
0.1
0.2
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0.5
10 12 14 16 18 20 22 24 26
July 27, 1991
ObsFTMS-MarFTMS-IntFTMS-Con
Time (LST)
0
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16 18 20 22 24 26
July 27, 1991
ObsFTMS-MarFTMS-InterFTMS-Con
Time (LST)
Figure 10
0
0.1
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16 18 20 22 24
July 27, 1991
ObsReisner2TMIS-MarTMIS-IntTMIS-Con
12Time (LST)
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10 12 14 16 18 20 22 24 26
July 27, 1991
ObsReisner2TMIS-MarTMIS-IntTMIS-Con
Time (LST)
Figure 11
0
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800July 27, 1991
0
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200July 27, 1991
ObsSBM-MarSBM-ConFTMS-MarFTMS-InterFTMS-ConTMIS-MarTMIS-InterTMIS-ConTMIS-Mar (Mod)Reisner2
0
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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
Figure 14
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60radar_error 5:38:28 PM 6/8/05
SBM-MarSBM-ConFTMS-MarFTMS-InterFTMS-ConTMIS-MarTMIS-InterTMIS-CONGSFCReisner2Schultz
0
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Figure 15
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FTMS Mar.
FTMS Inter
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Reisner2 Reisner2
Figure 16
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.