Publication Abstracts

Nault et al. 2021

Nault, B.A., P. Campuzano-Jost, D.A. Day, D.S. Jo, J.C. Schroder, H.M. Allen, R. Bahreini, H. Bian, D.R. Blake, M. Chin, S.L. Clegg, P.R. Colarco, J.D. Crounse, M.J. Cubison, P.F. DeCarlo, J.E. Dibb, G.S. Diskin, A. Hodzic, W. Hu, J.M. Katich, M.J. Kim, J.K. Kodros, A. Kupc, F.D. Lopez-Hilfiker, E.A. Marais, A.M. Middlebrook, J.A. Neuman, J.B. Nowak, B.B. Palm, F. Paulot, J.R. Pierce, G.P. Schill, E. Scheuer, J.A. Thornton, K. Tsigaridis, P.O. Wennberg, C.J. Williamson, and J.L. Jimenez, 2021: Chemical transport models often underestimate inorganic aerosol acidity in remote regions of the atmosphere. Commun. Earth Environ., 2, no. 1, 93, doi:10.1038/s43247-021-00164-0.

The inorganic fraction of fine particles affects numerous physicochemical processes in the atmosphere. However, there is large uncertainty in its burden and composition due to limited global measurements. Here, we present observations from eleven different aircraft campaigns from around the globe and investigate how aerosol pH and ammonium balance change from polluted to remote regions, such as over the oceans. Both parameters show increasing acidity with remoteness, at all altitudes, with pH decreasing from about 3 to about -1 and ammonium balance decreasing from almost 1 to nearly 0. We compare these observations against nine widely used chemical transport models and find that the simulations show more scatter (generally R2 < 0.50) and typically predict less acidic aerosol in the most remote regions. These differences in observations and predictions are likely to result in underestimating the model-predicted direct radiative cooling effect for sulfate, nitrate, and ammonium aerosol by 15-39%.

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BibTeX Citation

  author={Nault, B. A. and Campuzano-Jost, P. and Day, D. A. and Jo, D. S. and Schroder, J. C. and Allen, H. M. and Bahreini, R. and Bian, H. and Blake, D. R. and Chin, M. and Clegg, S. L. and Colarco, P. R. and Crounse, J. D. and Cubison, M. J. and DeCarlo, P. F. and Dibb, J. E. and Diskin, G. S. and Hodzic, A. and Hu, W. and Katich, J. M. and Kim, M. J. and Kodros, J. K. and Kupc, A. and Lopez-Hilfiker, F. D. and Marais, E. A. and Middlebrook, A. M. and Neuman, J. A. and Nowak, J. B. and Palm, B. B. and Paulot, F. and Pierce, J. R. and Schill, G. P. and Scheuer, E. and Thornton, J. A. and Tsigaridis, K. and Wennberg, P. O. and Williamson, C. J. and Jimenez, J. L.},
  title={Chemical transport models often underestimate inorganic aerosol acidity in remote regions of the atmosphere},
  journal={Commun. Earth Environ.},

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RIS Citation

ID  - na07400v
AU  - Nault, B. A.
AU  - Campuzano-Jost, P.
AU  - Day, D. A.
AU  - Jo, D. S.
AU  - Schroder, J. C.
AU  - Allen, H. M.
AU  - Bahreini, R.
AU  - Bian, H.
AU  - Blake, D. R.
AU  - Chin, M.
AU  - Clegg, S. L.
AU  - Colarco, P. R.
AU  - Crounse, J. D.
AU  - Cubison, M. J.
AU  - DeCarlo, P. F.
AU  - Dibb, J. E.
AU  - Diskin, G. S.
AU  - Hodzic, A.
AU  - Hu, W.
AU  - Katich, J. M.
AU  - Kim, M. J.
AU  - Kodros, J. K.
AU  - Kupc, A.
AU  - Lopez-Hilfiker, F. D.
AU  - Marais, E. A.
AU  - Middlebrook, A. M.
AU  - Neuman, J. A.
AU  - Nowak, J. B.
AU  - Palm, B. B.
AU  - Paulot, F.
AU  - Pierce, J. R.
AU  - Schill, G. P.
AU  - Scheuer, E.
AU  - Thornton, J. A.
AU  - Tsigaridis, K.
AU  - Wennberg, P. O.
AU  - Williamson, C. J.
AU  - Jimenez, J. L.
PY  - 2021
TI  - Chemical transport models often underestimate inorganic aerosol acidity in remote regions of the atmosphere
JA  - Commun. Earth Environ.
VL  - 2
IS  - 1
SP  - 93
DO  - 10.1038/s43247-021-00164-0
ER  -

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