Environmental Engineering Reference
In-Depth Information
Concentration
IOP2_CR1
16:00 - 16:15
6.0
5.0
4.0
3.0
2.0
LANL
ARL
IIBR
SAIC
1.0
0.0
0.0
1.0
2.0
3.0
4.0
5.0
6.0
JU2003 Observed Concentration (Log(1+ppt))
Fig. 2.
Concentration scatter plot for IOP02 (day) for the four models
difference between the four models' performance. The calculated relative mean
bias (e.g., the relative difference between the mean observed and predicted wind
speed or concentration) is found to be usually less than about ±20% to 40%.
However, the scatter is relatively large (about 60% for wind speed and a factor of
5-10 for concentration.
Acknowledgments
This research was supported by the U.S. Defense Threat Reduction Agency
(DTRA), with Dr. John Hannan as Project Manager. The QUIC model runs were supported by
LANL, the 3DWF model runs were supported by the U.S. Army Research Laboratory, and the
IIBR model runs were supported by that agency.
References
Allwine, K.J., Leach, M., Stockham, L., Shinn, J., Hosker, R., Bowers, J., Pace, J.: Overview of
Joint Urban 2003 - An atmospheric dispersion study in Oklahoma City, Preprints, Symposium
on Planning, Nowcasting and Forecasting in the Urban Zone, American Meteorological
Society, January (2004)
Clawson, K.L., Carter, R.G., Lacroix, D.J., Biltoft, C.J., Hukari, N.F., Johnson, R.C., Rich, J.D.,
Beard, S.A., Strong, T.: Joint Urban 2003 (JU03) SF6 Atmospheric Tracer Field Tests,
NOAA Tech Memo OAR ARL-254, Air Resources Lab., Silver Spring, MD (2005)
Gowardhan, A., Brown, M., Pardjyak, E.: Evaluation of a fast response pressure solver for flow
around an isolated cube. Environ. Fluid Mech. DOI 10.1007/s10652-009-9152-5 (2009)
Kaplan, H., Dinar, N.: A Lagrangian dispersion model for calculating concentration distribution
within a built-up domain., Atmos. Environ.
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