Three Dimensional SBM in MM5

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







Obs

Distance (km)

-0.1

0

0.1

0.2

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0.4

16 18 20 22 24

ObsSBM MarSBM Con

Time (GMT)

-1

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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



Figure 5





Figure 6










Maritime

Continental

Figure 7

0

10

20

30

40

50

0 5 10 15 20 25 30 35

Maritime Versus Continental Florida Simulations

MaritimeContinental

10LOG(Number)

10LOG(Radius)

Log Num

ber










Maritime

Continental

Figure 8







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Maritime

Continental

Figure 9

0

0.1

0.2

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10 12 14 16 18 20 22 24 26

July 27, 1991

ObsFTMS-MarFTMS-IntFTMS-Con

Time (LST)

0

1

2

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16 18 20 22 24 26

July 27, 1991

ObsFTMS-MarFTMS-InterFTMS-Con

Time (LST)

Figure 10

0

0.1

0.2

0.3

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0.6

16 18 20 22 24

July 27, 1991

ObsReisner2TMIS-MarTMIS-IntTMIS-Con

12Time (LST)

0

2

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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

100

200

300

400

500

600

700

800July 27, 1991

0

0

50

100

150

200July 27, 1991

ObsSBM-MarSBM-ConFTMS-MarFTMS-InterFTMS-ConTMIS-MarTMIS-InterTMIS-ConTMIS-Mar (Mod)Reisner2

0



















FTMS Inter.

FTMS Mar.

FTMS Cont.

TMIS Mar.

TMIS-Con.

TMIS-Inter.

Figure 12

















FTMS Mar.

FTMS Inter. TMIS Inter.

FTMS Con.

TMIS Mar.

TMIS Con.

Figure 13

Figure 14

0

10

20

30

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60radar_error 5:38:28 PM 6/8/05

SBM-MarSBM-ConFTMS-MarFTMS-InterFTMS-ConTMIS-MarTMIS-InterTMIS-CONGSFCReisner2Schultz

0




Figure 15





FTMS Mar.

FTMS Inter






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.

Three Dimensional SBM in MM5

Documents

ftms cont

microphysical characteristics

orographic precipitation

obsdistance kmfigure

dimensional sbm

axel seifert

alexander khain

jimy dudhia