Sources and formation of carbonaceous aerosols  in Xi'an, China: primary emissions and secondary  formation constrained by radiocarbon

Ni, Haiyan; Huang, Ru-Jin; Cao, Junji; Guo, Jie; Deng, Haoyue; Dusek, Ulrike

doi:https://doi.org/10.5194/acp-19-15609-2019

Articles | Volume 19, issue 24

https://doi.org/10.5194/acp-19-15609-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-19-15609-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 24

Research article

|

20 Dec 2019

Research article |

| 20 Dec 2019

Sources and formation of carbonaceous aerosols in Xi'an, China: primary emissions and secondary formation constrained by radiocarbon

Haiyan Ni, Ru-Jin Huang, Junji Cao, Jie Guo, Haoyue Deng, and Ulrike Dusek

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Final revised paper (published on 20 Dec 2019)
Supplement to the final revised paper
Preprint (discussion started on 21 Jun 2019)
Supplement to the preprint

Interactive discussion

Status: closed

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

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RC1: 'Reviewer's comments to ACP-2019-437', Anonymous Referee #2, 30 Jul 2019
RC2: 'Referee's comments to ACP-2019-437', Anonymous Referee #3, 23 Aug 2019
AC1: 'Response to reviewers', Ru-Jin Huang, 15 Oct 2019

Peer-review completion

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

AR by Ru-Jin Huang on behalf of the Authors (15 Oct 2019) Author's response Manuscript

ED: Publish subject to minor revisions (review by editor) (01 Nov 2019) by Willy Maenhaut

The authors have reasonably well addressed the comments of the two anonymous referees and they have modified their manuscript accordingly. However, the comments given below should be addressed and several alterations are needed for the Main text and Supplement before the manuscript can be published in ACP.

For the Main text:
Page 2, line 12: Replace "aaccording" by "according".
Page 3, line 16: Delete "one-year" to be consistent with the reply to Main comment 1 of Anonymous reviewer #2.
Page 5, line 5: Replace "EC step" by "the EC step".
Page 5, line 11: Replace "total carbon (TC = OC + EC)" by "TC" as TC was already defined in line 13 of page 4.
Page 5, line 22: Replace "with dry" by "with a dry".
Page 5, line 28: Replace "that left" by "that is left".
Page 6, line 2: Replace "by EUSAAR_2" by "by the EUSAAR_2".
Page 7, line 6: Insert a space before "In 2010".
Page 7, line 18: Replace "with the" by "by the".
Page 7, line 25: Replace "is presented" by "are presented".
Page 7, line 27: Replace "dividing with" by "dividing by".
Page 8, line 1: Replace "because that" by "because".
Page 8, line 10: Replace "include both" by "including both".
Page 8, line 11: Replace "Levin and Hammer, 2013; Levin et al., 2010" by "Levin et al., 2010, 2013".
Page 8, line 13: Replace "1 .09" by "1.09".
Page 8, line 23, and also further within the text: the "EC tracer method" is mentioned without any literature reference. At least one literature reference is needed for it. I suggest including the following literature reference here: "Turpin and Huntzicker, 1995"; the full reference for it is: Turpin, B. J. and Huntzicker, J. J.: Identification of secondary organic aerosol episodes and quantitation of primary and secondary organic aerosol concentrations during SCAQS, Atmos. Environ., 29, 3527-3544, 1995.
Page 8, line 26: Replace "ealier" by "earlier".
Page 9, line 19: Replace "and is 0" by "and 0".
Page 9, line 19: "0 at the lower limit and upper limit" is unclear to me. How can it be 0 at the upper limit?
Page 9, line 23: Replace "estimates and the interquartile range" by "estimate and the interquartile ranges".
Page 11, line 15: Replace "also to be slightly" by "also slightly".
Page 11, line 22: Replace "than that in" by "than in".
Page 12, line 2: Replace "is larger" by "are larger".
Page 12, line 12: Replace "that to" by "those to".
Page 12, line 23: Insert a space before "(range of".
Page 13, line 7: Replace "as at an" by "as an".
Page 13, line 29: Replace "type of" by "types of".
Page 14, lines 20-21: Replace "Markov chain Monte Carlo techniques (MCMC)" by "MCMC" as MCMC was already defined in line 27 of page 9.
Page 15, line 9: Replace "than that in" by "than in".
Page 15, line 11: Replace "in pervious" by "in previous".
Page 15, line 28: Replace "than winter" by "than in winter".
Page 16, line 24: Replace "period is also" by "period are also".
Page 16, line 26: Replace "ratios was found" by "ratios were found".
Page 16, line 31: Replace "that is more" by "that are more".
Page 17, line 1: Replace "In warm" by "In the warm".
Page 17, line 10: Replace "are mainly" by "is mainly".
Page 17, line 13: Replace "wide range" by "the wide range".
Page 17, line 20: Replace "most of samples" by "most samples".
Page 17, line 21: Replace "of WIOC" by "of the WIOC".
Page 18, line 5: Replace "overestimate of" by "overestimate of the".
Page 18, line 9: Replace "in warm" by "in the warm".
Page 18, line 19: Replace "in warm" by "in the warm".
Page 19, line 3: Replace "were observed" by "was observed".
Page 19, line 6: Replace "Markov chain Monte Carlo techniques (MCMC)" by "MCMC" as MCMC was already defined in line 27 of page 9.
Page 19, line 17: Replace "than that for" by "than for".
Page 19, line 19: Replace "was found" by "were found".
Page 19, line 23: Replace "in warm" by "in the warm".
Page 19, line 31: Replace "using EC" by "using the EC".
Page 20, line 3: Replace "resulted" by "resulting".
Page 20, line 5: Replace "than other" by "than in the other".
Page 20, line 8: Replace "that photochemical" by "photochemical" and replace "affect final" by "affects final".
Page 20, line 12: Replace "Supplment" by "Supplement".
Page 20, line 16: Replace "preformed" by "performed".
Page 23, line 8: Replace "B. Kromer" by "Kromer, B.".
Page 23, lines 8-14: "Levin et al., 2013" should come after "Levin et al., 2010".
Page 24, line 3: Replace "2006" by "2006.".
Page 24, line 42: The reference is incomplete.
Page 25, line 22: Replace "2009." by "2009,".
Page 25, line 42: The reference is incomplete.
Page 26, line 9: The reference is incomplete.
Page 31, line 2: Replace "4. The" by "4.".
Page 34, line 2: Replace "The estimated" by "Estimated".
Page 35, line 2: Replace "A scatter" by "Scatter".
Page 35, line 3: Replace "and warm" by "and the warm" and replace "The WIOC" by "WIOC".
Page 36, line 3: Replace "with panel" by "as panel" and replace "A scatter" by "Scatter".
Page 36, line 4: Replace "A scatter" by "Scatter".

For the Supplement:
Line 20: Replace "of EC" by "of the EC".
Line 55: Replace "An example" by "Example".
Line 56: Replace "of and" by "of".

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AR by Ru-Jin Huang on behalf of the Authors (02 Nov 2019) Author's response Manuscript

ED: Publish as is (17 Nov 2019) by Willy Maenhaut

AR by Ru-Jin Huang on behalf of the Authors (20 Nov 2019)

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Short summary

We present a 1-year source apportionment record of carbonaceous aerosols in Xi'an, China. Biomass burning strongly increases in winter, while seasonal changes of coal and liquid fossil fuel combustion are moderate. We find strong evidence for fossil secondary OC formation during the warm period that is further enhanced in stagnant, polluted conditions due to longer atmospheric residence times. At the same time we find that water-insoluble (primary) fossil is lost due to photochemical processing.