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Community Multiscale Air Quality Modeling System (CMAQ)

How to Cite CMAQ

We are glad that you have found CMAQ useful and are interested in referencing one of our released model versions, scientific algorithms or model output in your own publication. Based on your situation, please use the appropriate convention below: 

Referencing a Specific Scientific Component of the System

Transport and Physical Processes

Particle Microphysics and Chemistry

  • SOA in CMAQv5.2

    Pye, H. O. T., Murphy, B. N., Xu, L., Ng, N. L., Carlton, A. G., Guo, H., Weber, R., Vasilakos, P., Appel, K. W., Budisulistiorini, S. H., Surratt, J. D., Nenes, A., Hu, W., Jimenez, J. L., Isaacman-VanWertz, G., Misztal, P. K., & Goldstein, A. H. (2017). On the implications of aerosol liquid water and phase separation for organic aerosol mass. Atmos. Chem. Phys., 17: 343-369. doi:10.5194/acp-17-343-2017Exit

    Cloud Chemistry in CMAQv5.1

    Fahey, K.M., Carlton, A.G., Pye, H.O.T., Baek, J., Hutzell, W.T., Stanier, C.O., Baker, K.R., Appel, K.W., Jaoui, M., & Offenberg, J.H. (2017). A framework for expanding aqueous chemistry in the Community Multiscale Air Quality (CMAQ) model version 5.1. Geoscientific Model Development, 10, 1587-1605. doi: 10.5194/gmd-10-1587-2017Exit

    SOA in CMAQv5.1

    Pye, H.O.T & Pouliot, G.A. (2012). Modeling the role of alkanes, polycyclic aromatic hydrocarbons, and their oligomers in secondary organic aerosol formation. Environ. Sci. Technol., 46: 6041-6047. doi: 10.1021/es300409wExit

    Pye, H.O.T., Pinder, R.W., Piletic, I., Xie, Y., Capps, S.L., Lin, Y.-H., Surratt, J.D., Zhang, Z., Gold, A., Luecken, D.J., Hutzell, W.T., Jaoui, M., Offenberg, J.H., Kleindienst, T.E., Lewandowski, M., & Edney, E.O. (2013). Epoxide pathways improve model predictions of isoprene markers and reveal key role of acidity in aerosol formation. Environ. Sci.  Technol., 47(19): 11056-11064. doi: 10.1021/es402106hExit

    SOA in CMAQv4.7

    Carlton, A. G., Bhave, P. V., Napelenok, S. L., Edney, E. O., Sarwar, G., Pinder, R. W., Pouliot, G. A., & Houyoux, M. (2010). Model representation of secondary organic aerosol in CMAQv4.7. Environ. Sci. Technol., 44(22): 8553–8560. doi: 10.1021/es100636qEXIT

    Semivolatile POA + Potential Combustion SOA in CMAQ v5.2

    Murphy, B. N., Woody, M. C., Jimenez, J. L., Carlton, A. M. G., Hayes, P. L., Liu, S., Ng, N. L., Russell, L. M., Setyan, A., Xu, L., Young, J., Zaveri, R. A., Zhang, Q., and Pye, H. O. T.: Semivolatile POA and parameterized total combustion SOA in CMAQv5.2: impacts on source strength and partitioning, Atmos. Chem. Phys. Discuss., doi: 10.5194/acp-2017-193 EXIT, in review, 2017.

    Nonvolatile POA in CMAQ v5.0 - 5.2

    Simon, H., & Bhave, P.V. (2012). Simulating the degree of oxidation in atmospheric organic particles, Environ. Sci. Technol., 46(1): 331-339. doi: 10.1021/es202361wExit

    PM2.5 Trace Elements

    Appel, K.W., Pouliot, G.A., Simon, H., Sarwar, G., Pye, H.O.T., Napelenok, S.L., Akhtar, F., & Roselle, S.J. (2013). Evaluation of dust and trace metal estimates from the Community Multiscale Air Quality (CMAQ) model version 5.0. Geoscientific Model Development, 6, 883-899. doi: 10.5194/gmd-6-883-2013Exit

    Reff, A.H., Bhave, P., Simon, H., Pace, T., Pouliot, G., Mobley, D., & Houyoux, M. (2009). Emissions inventory of PM2.5 trace elements across the United States. Environmental Science & Technology, 43(15), 5790-5796. doi:10.1021/es802930xExit

CMAQ Implementations of Gas-phase Chemical Mechanisms

  • CBO5

    Sarwar, G., Luecken, D.J., Yarwood, G., Whitten, G.D., & Carter, W.P. (2008). Impact of an updated carbon bond mechanism on predictions from the CMAQ modeling system: preliminary assessment. Journal of Applied Meteorology and Climatology, 47(1), 3-14.

    CB05TU

    Sarwar, G., Appel, K.W., Carlton, A.G., Mathur, R., Schere, K., Zhang, R., & Majeed, M.A. (2011). Impact of a new condensed toluene mechanism on air quality model predictions in the US. Geosci. Model Dev., 4, 183-193. doi: 10.5194/gmd-4-183-2011Exit

    Whitten, G.Z., Heo, G., Kimura, Y., McDonald-Buller, E., Allen, D.T., Carter, W.PL., & Yarwood, D. (2010). A new condensed toluene mechanism for Carbon Bond: CB05-TU. Atmosperic Environment, 44, 5346-5355. doi: 10.1016/j.atmosenv.2009.12.029Exit

    CB05TUCl

    Sarwar, G., Simon, H., Bhave, P., & Yarwood, G. (2012). Examining the impact of heterogeneous nitryl chloride production on air quality across the United States. Atmospheric Chemistry and Physics, 12, 6455-6473. doi: 10.5194/acp-12-6455-2012Exit

    CB05e51

    Appel, K.W., Napelenok, S., Foley, K.M., Pye, H.O.T., Hogrefe, C., Luecken, D.J., Bash, J.O., Roselle, S.J., Pleim, J.E., Foroutan, H., Hutzell, W., Pouliot, G., Sarwar, G., Sarwar, G., Fahey, K., Gantt, B., Gilliam, R.C., Kang, D., Mathur, R., Schwede, D., Spero, T., Wong, D.C., & Young, J. (2017). Overview and evaluation of the Community Multiscale Air Quality (CMAQ) model version 5.1. Geosci. Model Dev. Discuss., 1-41. doi: 10.5194/gmd-2016-226 EXIT.

    RACM2

    Sarwar, G., Godowitch, J., Henderson, B., Fahey, K., Pouliot, G., Hutzell, B., Mathur, R., Kang, D., Goliff, W., & Stockwell, W. (2013). A comparison of atmospheric composition using the Carbon Bond and Regional Atmospheric Chemistry Mechanisms. Atmospheric Chemistry and Physics,13(19):9675-9712.

    SAPRC07T

    Hutzell, W.T., Luecken, D.J., Appel, W.K., & Carter, W.P. (2011). Interpreting Predictions from the SAPRC07 Mechanism Based on Regional and Continental Simulations. Atmospheric Environment, 46(00), 417-429.

    SAPRC07tic

    Xie, Y., Paulot, F., Carter, W., Nolte, C., Luecken, D., Hutzell, B., Wennberg, P., Cohen, R., & Pinder, R. (2013). Understanding the impact of recent advances in isoprene photooxidation on simulations of regional air quality. Atmospheric Chemistry and Physics,13, 8439-8455.

    Marine Halogen Chemistry

    Sarwar, G., Gantt, B., Schwede, D., Foley, K., Mathur, R., & Saiz-Lopez, A. (2015). Impact of enhanced ozone deposition and halogen chemistry on tropospheric ozone over the Northern Hemisphere. Environmental Science & Technology, 49(15), 9203-9211.

    ClNO2 Chemistry

    Sarwar, G., Simon, H., Bhave, P., & Yarwood, G. (2012). Examining the impact of heterogeneous nitryl chloride production on air quality across the United States. Atmospheric Chemistry and Physics, 12, 6455-6473. doi: 10.5194/acp-12-6455-2012EXIT

Referencing Evaluation of a Specific Version 

  • CMAQv5.1

    Appel, K.W., Napelenok, S., Foley, K.M., Pye, H.O.T., Hogrefe, C., Luecken, D.J., Bash, J.O., Roselle, S.J., Pleim, J.E., Foroutan, H., Hutzell, W., Pouliot, G., Sarwar, G., Sarwar, G., Fahey, K., Gantt, B., Gilliam, R.C., Kang, D., Mathur, R., Schwede, D., Spero, T., Wong, D.C., & Young, J. (2017). Overview and evaluation of the Community Multiscale Air Quality (CMAQ) model version 5.1. Geosci. Model Dev. Discuss.: 1-41. doi: 10.5194/gmd-2016-226 EXIT.

    CMAQv5.0

    Appel, K.W., Pouliot, G.A., Simon, H., Sarwar, G., Pye, H.O.T., Napelenok, S.L., Akhtar, F., and Roselle, S.J. (2013). Evaluation of dust and trace metal estimates from the Community Multiscale Air Quality (CMAQ) model version 5.0. Geosci. Model Dev.6: 883-899. doi: 10.5194/gmd-6-883-2013EXIT

    CMAQv4.7

    Appel, K.W., Foley, K. Bash, J.O., Pinder, R.W., Dennis, R.L., Allen, D.J., & Pickering, K.  (2011). A multi-resolution assessment of the Community Multiscale Air Quality (CMAQ) model v4.7 wet deposition estimates for 2002 - 2006. Geosci. Model Dev., 4(2): 357-371. doi: 10.5194/gmd-4-357-2011EXIT 

    Foley, K., Roselle, S.J., Appel, K.W., Bhave, P., Pleim, J.E., Otte, T.L., Mathur, R., Sarwar, G., Young, J.O., Gilliam, R.C., Nolte, C.G., Kelly, J.T., Gilliland, A., & Bash, J.O. (2010). Incremental testing of the Community Multiscale Air Quality (CMAQ) modeling system version 4.7. Geosci. Model Dev., 3: 205-226. doi: 10.5194/gmd-3-205-2010EXIT

    CMAQv4.5

    Appel, K.W., Bhave, P., Gilliland, A., Sarwar, G., & Roselle, S.J. (2008). Evaluation of the Community Multiscale Air Quality (CMAQ) model version 4.5: uncertainties and sensitivities impacting model performance: part II - particulate matter. Atmospheric Environment, 42(24): 6057-6066. doi:  10.1016/j.atmosenv.2008.03.036EXIT

    Appel, K.W., Gilliland, A., Sarwar, G., & Gilliam R.C. (2007). Evaluation of the Community Multiscale Air Quality (CMAQ) model version 4.5: uncertainties and sensitivities impacting model performance: part I - ozone. Atmospheric Environment, 41(40): 9603-9613. doi: 10.1016/j.atmosenv.2007.08.044EXIT

General Citation of the CMAQ System

If you are mentioning the CMAQ system overall, and not a specific version or dataset, please cite this CMAQ website: www.epa.gov/cmaq