Abstract
Eulerian-based air quality models encounter a serious numerical problem in solving the advection equation. In addition, mass conservation is often violated when meteorological model output is used as input to air quality models. The Trajectory-Grid algorithm handles the advection and eddy-diffusion in the Lagrangian and Eulerian framework, respectively. It is very accurate and can be used to trivially solve the advection equation for mixing ratios to address (but not correct) the mass conservation issue. We incorporated the algorithm into the state-of-the-science Comprehensive Air Quality Model with Extensions (CAMx). Applications of the model reveal the inaccuracy of the commonly used Bott advection scheme, and the subsequent compensating errors of the model. The results clearly call for a more reliable description of eddy diffusivity and emissions inventory in order to truly improve the reliability and predictive capability of air quality models.
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References
Chock, D. P., Winkler, S. L., Sun, P., 1994, Comparison of stiff chemistry solvers for air quality modeling. Environ. Sci, & Technol. 28, pp. 1882–1892.
Chock, D. P., Sun, P., Winkler, S. L., 1996, Trajectory-Grid: An accurate sign-preserving advection-diffusion approach for air quality modeling. Atmos. Environ. 30, pp. 857–868.
Chock, D. P., Winkler, S. L., Hass, H., Ackermann, I. J., 1998, Use of the Trajectory-Grid algorithm in the EURAD Chemistry-Transport Model version 2 (CTM2). In Global and Regional Atmospheric Modeling, Proceedings of the First GLOREAM Workshop, Aachen, Germany, September 1997, Eds. Hass, H. and Ackermann, I. J., pp. 185–192.
Chock, D. P., Winkler, S. L., 2000, A Trajectory-Grid Approach for Solving the Condensation and Evaporation Equations of Aerosols. Atmos. Environ. 34, pp. 2957–2973.
Dudhia, J., 1993, A nonhydrostatic version of the Penn State-NCAR mesoscale model: validation tests and simulation of an Atlantic cyclone and cold front. Mon. Wea. Rev. 121, pp. 1493–1513.
Environ, Novato, CA, 2004, http://www.camx.com/overview.html
Gaydos, T. M., Koo, B., Pandis, S. N. Chock, D. P., 2003, Development and application of an efficient moving sectional approach for the solution of the atmospheric aerosol condensation/evaporation equations. Atmos. Environ. 37, pp. 3303–3316.
Grell, G. A., Dudhia, J., Stauffer, D. R., 1994, A description of the Fifth-Generation Penn State/NCAR Mesoscale Model (MM5), NCAR/TN-398 + STR, NCAR Technical Note, Boulder, CO, USA, December, 122 p.
Lee, S. M., Yoon, S. C., Byun, D. W., 2004, The effect of mass inconsistency of the meteorological field generated by a common meteorological model on air quality modeling. Atmos. Environ. 38, pp. 2917–2926.
Sun, P., Chock, D. P., Winkler, S. L., 1994, An Implicit-Explicit Hybrid solver for a system of stiff kinetic equations. J. Computational Phys. 115, pp. 515–523.
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Chock, D.P., Whalen, M.J., Winkler, S.L., Sun, P. (2005). Implementing the Trajectory-Grid Transport Algorithm in an Air Quality Model. In: Faragó, I., Georgiev, K., Havasi, Á. (eds) Advances in Air Pollution Modeling for Environmental Security. NATO Science Series, vol 54. Springer, Dordrecht. https://doi.org/10.1007/1-4020-3351-6_6
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DOI: https://doi.org/10.1007/1-4020-3351-6_6
Publisher Name: Springer, Dordrecht
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