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Table of Contents - The Atmospheric Studies Group at TRC

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Section 8: CALMET Model Files<br />

<strong>Table</strong> 8-4 (Continued)<br />

Input <strong>Group</strong> 5 - Wind Field Options and Parameters<br />

Variable Type Description Default Value<br />

TERRAD real Radius <strong>of</strong> influence <strong>of</strong> terrain fe<strong>at</strong>ures (km) -<br />

R1 real Weighting parameter for the diagnostic wind<br />

field in the surface layer (km). This parameter<br />

controls the rel<strong>at</strong>ive weighting <strong>of</strong> the first-guess<br />

wind field produced by the diagnostic wind field<br />

model and the observ<strong>at</strong>ions. R1 is the distance<br />

from an observ<strong>at</strong>ional st<strong>at</strong>ion <strong>at</strong> which the<br />

observ<strong>at</strong>ion and the first-guess field are equally<br />

weighted.<br />

R2 real Weighting parameter for the diagnostic wind<br />

field in the layers al<strong>of</strong>t (km). R2 is applied in the<br />

upper layers in the same manner as R1 is used in<br />

the surface layer.<br />

RPROG real Weighting parameter (km) for the prognostic<br />

wind field d<strong>at</strong>a<br />

DIVLIM real Convergence criterion for the divergence<br />

minimiz<strong>at</strong>ion procedure<br />

NITER integer Maximum number <strong>of</strong> iter<strong>at</strong>ions for the<br />

divergence minimiz<strong>at</strong>ion procedure<br />

NSMTH integer array Number <strong>of</strong> smoothing passes in each layer<br />

NZ values must be entered.<br />

NINTR2 integer array Maximum number <strong>of</strong> st<strong>at</strong>ions used in the<br />

interpol<strong>at</strong>ion <strong>of</strong> d<strong>at</strong>a to a grid point for each layer<br />

1-NZ. This allows only the "NINTR2" closest<br />

st<strong>at</strong>ions to be included in the interpol<strong>at</strong>ion. <strong>The</strong><br />

effect <strong>of</strong> increasing NINTR2 is similar to<br />

smoothing. NZ values must be entered.<br />

CRITFN real Critical Froude number used in the evalu<strong>at</strong>ion <strong>of</strong><br />

terrain blocking effects<br />

-<br />

-<br />

-<br />

5.0E-6<br />

50<br />

2,(MXNZ-1)*4<br />

99<br />

1.0<br />

(Input <strong>Group</strong> 5 Continued)<br />

8-44

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