Volume 1 - The Atmospheric Studies Group at TRC
Volume 1 - The Atmospheric Studies Group at TRC
Volume 1 - The Atmospheric Studies Group at TRC
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<strong>The</strong> performance evalu<strong>at</strong>ion system also provides results for the fraction of model<br />
predictions th<strong>at</strong> are within a factor-of-2 of the observ<strong>at</strong>ions (FAC2), and the<br />
correl<strong>at</strong>ion:<br />
Modeled Iy FAC2 Correl<strong>at</strong>ion<br />
CALPUFF<br />
0.655 0.842<br />
(CALPUFF Turbulence Profile)<br />
CALPUFF<br />
0.664 0.848<br />
(AERMOD Turbulence Profile)<br />
OCD5 0.536 0.712<br />
Observed Iy FAC2 Correl<strong>at</strong>ion<br />
CALPUFF<br />
0.582 0.827<br />
(CALPUFF Turbulence Profile)<br />
CALPUFF<br />
0.600 0.834<br />
(AERMOD Turbulence Profile)<br />
OCD5 0.545 0.663<br />
Based on these measures across all 4 d<strong>at</strong>asets, the prototype model for OCS<br />
applic<strong>at</strong>ions improves upon the previous model designed for OCS applic<strong>at</strong>ions. It<br />
has a small mean bias toward overprediction, and exhibits sc<strong>at</strong>ter th<strong>at</strong> is typical in<br />
th<strong>at</strong> it is close to a factor of two.<br />
Final Report Vol.1 76