Brown carbon aerosol in the North American continental troposphere: sources, abundance, and radiative forcing

Liu, J.; Scheuer, E.; Dibb, J.; Diskin, G. S.; Ziemba, L. D.; Thornhill, K. L.; Anderson, B. E.; Wisthaler, A.; Mikoviny, T.; Devi, J. J.; Bergin, M.; Perring, A. E.; Markovic, M. Z.; Schwarz, J. P.; Campuzano-Jost, P.; Day, D. A.; Jimenez, J. L.; Weber, R. J.

doi:https://doi.org/10.5194/acp-15-7841-2015

Articles | Volume 15, issue 14

https://doi.org/10.5194/acp-15-7841-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/acp-15-7841-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 15, issue 14

Research article

|

16 Jul 2015

Research article |

| 16 Jul 2015

Brown carbon aerosol in the North American continental troposphere: sources, abundance, and radiative forcing

J. Liu, E. Scheuer, J. Dibb, G. S. Diskin, L. D. Ziemba, K. L. Thornhill, B. E. Anderson, A. Wisthaler, T. Mikoviny, J. J. Devi, M. Bergin, A. E. Perring, M. Z. Markovic, J. P. Schwarz, P. Campuzano-Jost, D. A. Day, J. L. Jimenez, and R. J. Weber

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Preprint (discussion started on 03 Mar 2015)
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Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC C1139: 'Review', Anonymous Referee #1, 26 Mar 2015
- AC C3377: 'Response to reviewer 1', Rodney Weber, 09 Jun 2015
RC C1198: 'review of Liu et al.', Anonymous Referee #2, 30 Mar 2015
- AC C3378: 'Response to reviewer 2', Rodney Weber, 09 Jun 2015
RC C1670: 'Review of Liu et al. (2015)', Anonymous Referee #3, 19 Apr 2015
- AC C3379: 'Response to reviewer 3', Rodney Weber, 09 Jun 2015

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Rodney Weber on behalf of the Authors (09 Jun 2015) Manuscript

ED: Publish as is (18 Jun 2015) by Neil M. Donahue

AR by Rodney Weber on behalf of the Authors (25 Jun 2015)

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Short summary

Brown carbon (BrC) is found throughout the US continental troposphere during a summer of extensive biomass burning and its prevalence relative to black carbon (BC) increases with altitude. A radiative transfer model based on direct measurements of aerosol scattering and absorption by BC and BrC shows BrC reduces top-of-atmosphere forcing by 20%. A method to estimate BrC radiative forcing efficiencies from surface-based measurements is provided.