General Profiling Equations
WIND SPEED PROFILING IN THE INTERFACE
At least one wind speed measurement is required for each simulation with AERMOD. The AERMOD profile equation for wind speed is:
For
the CBL, the 
m’s are
evaluated using eq. (7) with zref replaced by z, and
during stable conditions
they are calculated as follows (Van Ulden and Holtslag, 1985):
For
small z/L (<<1), eq. (29) reduces to the
well-known m
form given in eq. (19),
with ßm = 5;
in eq. (29) the effective constant ßm
in the small z/L limit
is 4.93. m m
However,
for large z/L (>1) and heights as great as 200 meters in
the SBL, the m given by
eq. (29) is
found to fit wind observations much better than the m
given by eq.(19) (see
van Ulden m and Holtslog, 1985).
Figure 2 and Figure 3 show the form of the wind profiles used by AERMOD. In order to produce these figures, and others which follow, we constructed two typical cases, one each for the CBL and the SBL. For the CBL we assumed that zi =1000m, L=-10m and zo =0.1 (_zo =.0001zi and L=-.01zi ). For the SBL we assumed that zi =100m, L=10m and zo =0.1m
Figure 2: Wind speed profile, for both CBL and SBL, in the region below 7Zo
Figure 3: Wind speed profile, for both CBL and SBL, in the region above 7Zo
4 AERMOD’s Meteorological Interface
4.1
General Profiling Equations
4.1.1
WIND SPEED PROFILING IN THE INTERFACE
4.1.2
WIND DIRECTION PROFILES IN INTERFACE
4.1.3
PROFILES OF THE POTENTIAL TEMPERATURE GRADIENT IN THE
INTERFACE
4.1.4
POTENTIAL TEMPERATURE PROFILING IN THE INTERFACE
4.1.5
VERTICAL TURBULENCE CALCULATED BY THE INTERFACE
4.1.6
LATERAL TURBULENCE CALCULATED BY THE INTERFACE
4.2
Vertical Inhomogeneity in the Boundary Layer as Treated by the INTERFACE
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