Environmental Engineering Reference
In-Depth Information
Acknowledgments
Meteorology simulations were conducted at ARB by Dr. Dazhong Yin and
Dr. Kemal Gürer. Authors thank the entire ARCTAS Science Team for their excellent
contributions to the ARCTAS-CA 2008 (http://www.espo.nasa.gov/arctas/participants.php).
Disclaimer
This paper has been reviewed by the staff of the California Air Resources Board and
has been approved for publication. Approval does not signify that the contents necessarily reflect
the views and policies of the California Air Resources Board, nor does mention of trade names or
commercial products constitute endorsement or recommendation for use.
References
Studies) can be found at www.arb.ca.gov/airways/
District, is found at www.aqmd.gov/news1/2005/matesiiifactsheet.html
air.larc.nasa.gov/missions/arctas/arctas.html
fieldstudy2010/fieldstudy2010.htm
Byun, D. and Schere, K.L., Review of the Governing Equations, Computational Algorithms, and
System,
Appl. Mech. Rev.
59, 51, 2006.
Carter, W.P.L., 2000. Implementation of the SAPRC-99 chemical mechanism into the
www.cert.ucr.edu/~carter/absts.htm#s99mod3
State/NCAR mesoscale model (MM5). NCAR Technical Note NCAR/TN 398+STR.
4. Questions and Answers
Question:
Is your NOx simulation as bad as you explained?
Answer:
The agreement between the simulation and measurements presented
were typical of that reported previously for California and other areas. The
simulated NOx concentrations were generally lower than those observed by the
aircraft. This is expected as the simulation is not able to represent NOx plumes
very realistically since all NOx emissions in a 4 × 4 km two grid cell would be
diluted instantaneously into that grid cell. But, the locations of most NOx peaks
were represented well in the simulation. That indicates that the emissions
inventory has major NOx sources in the correct places. The simulation may not
improve unless we include the plume-in-grid treatment for NOx sources, but
California does not have major NOx sources that warrant the plume-in-grid
treatment.
