Three Dimensional SBM in MM5

1
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

2
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

3
Obs July 27, 1991
Figure 1
Figure1
Distance (km)
4
Obs
Figure 2
Distance (km)
5
Figure 3
6
Figure 4 From of observations within
histogram ban width divided by total number of
positive returns.
Maritime
Continental
7
Figure 5
8
Figure 6
9
Figure 7
Maritime
Continental
Log Number
10
Figure 8
Maritime
Maritime
Continental
Continental
11
Figure 9
12
Figure 10
13
Figure 11
14
Figure 12
FTMS Mar.
TMIS Mar.
FTMS Inter.
TMIS-Inter.
FTMS Cont.
TMIS-Con.
15
Figure 13
FTMS Mar.
TMIS Mar.
TMIS Inter.
FTMS Inter.
FTMS Con.
TMIS Con.
16
Figure 14
17
Figure 15
FTMS Mar.
FTMS Inter
18
Figure 16
Reisner2
Reisner2
19
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.