Three Dimensional SBM in MM5 Two Case Studies: Florida Simulation of Sea Breeze (7/27/91):...

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)

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16 18 20 22 24

ObsSBM MarSBM Con

Time (GMT)

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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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QuickTime™ and aTIFF (LZW) decompressor

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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

Figure 9

0

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10 12 14 16 18 20 22 24 26

July 27, 1991

ObsFTMS-MarFTMS-IntFTMS-Con

Time (LST)

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16 18 20 22 24 26

July 27, 1991

ObsFTMS-MarFTMS-InterFTMS-Con

Time (LST)

Figure 10

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July 27, 1991

ObsReisner2TMIS-MarTMIS-IntTMIS-Con

12Time (LST)

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July 27, 1991

ObsReisner2TMIS-MarTMIS-IntTMIS-Con

Time (LST)

Figure 11

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800July 27, 1991

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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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QuickTime™ and aTIFF (LZW) decompressor

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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

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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.