Spatiotemporal variation and trends in equivalent black carbon in the Helsinki metropolitan area in Finland

Luoma, Krista; Niemi, Jarkko V.; Aurela, Minna; Fung, Pak Lun; Helin, Aku; Hussein, Tareq; Kangas, Leena; Kousa, Anu; Rönkkö, Topi; Timonen, Hilkka; Virkkula, Aki; Petäjä, Tuukka

doi:https://doi.org/10.5194/acp-21-1173-2021

Articles | Volume 21, issue 2

https://doi.org/10.5194/acp-21-1173-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-21-1173-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 2

Research article

|

28 Jan 2021

Research article |

| 28 Jan 2021

Spatiotemporal variation and trends in equivalent black carbon in the Helsinki metropolitan area in Finland

Krista Luoma, Jarkko V. Niemi, Minna Aurela, Pak Lun Fung, Aku Helin, Tareq Hussein, Leena Kangas, Anu Kousa, Topi Rönkkö, Hilkka Timonen, Aki Virkkula, and Tuukka Petäjä

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Final revised paper (published on 28 Jan 2021)
Supplement to the final revised paper
Preprint (discussion started on 29 Apr 2020)
Supplement to the preprint

Interactive discussion

Status: closed

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

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- Supplement

RC1: 'Suggested minor revisions', Anonymous Referee #2, 20 May 2020
RC2: 'Referee Comment', Anonymous Referee #3, 06 Aug 2020
AC1: 'Response to referees', Krista Luoma, 05 Oct 2020

Peer-review completion

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

AR by Krista Luoma on behalf of the Authors (07 Oct 2020) Author's response Manuscript

ED: Publish subject to minor revisions (review by editor) (25 Oct 2020) by Willy Maenhaut

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

For the Main text:
Line 25: Replace "at least" by "at least a".
Line 37: Replace "were due" by "was due".
Line 47: Replace "on bad" by "of bad".
Line 76: Replace "locates on" by "is situated on".
Line 87: Replace "are shown in" by "are given in".
Lines 89, 92, 99, and 101: Replace "located" by "were located".
Line 101: "Järvi et al., 2009" is missing in the Reference list.
Line 109: Replace "at the RB2" by "at RB2".
Line 110: Replace "at the UB2" by "at UB2".
Line 111: Replace "All the BC" by "All BC".
Line 116: Replace "at different" by "at the different".
Line 120: Replace "for first" by "for the first".
Line 122: Replace "caused big" by "caused a big".
Line 123: Replace "of year" by "of the year".
Line 125: Replace "period, however" by "period; however".
Line 129: Replace "in two" by "at two".
Line 136: Replace "to MAAP" by "to the MAAP".
Line 142: Replace "uses mass" by "uses a mass".
Line 168: Replace "were measured" by "was measured".
Line 174: Replace "the stations" by "stations".
Line 177: Replace "were assured" by "was assured".
Line 181: Replace "are reported" by "is reported".
Line 188: "Collaud Coen et al., 2007" and "Collaud Coen et al., 2013" are missing in the Reference list.
Line 200: Replace "at the TR1" by "at TR1".
Line 224: Replace "passing the TR1" by "passing TR1".
Line 234: Replace "in middle" by "in the middle".
Line 240: Replace "observed mean" by "observed a mean".
Line 247: Replace "HMA affected by the sea breeze and is" by "HMA is affected by the sea breeze and the air is".
Line 256: Replace "that, the" by "that the".
Line 257: Replace "The correlation" by "The correlations".
Line 275: Replace "indicated that" by "indicates that".
Line 276: Replace "were observed" by "was observed".
Line 286: Replace "and that the" by "whereby the".
Line 296: Replace "in the Sect." by "in Sect.".
Line 300: Replace "act as" by "acts as".
Line 313: Replace "in Table" by "at Table".
Line 315: Replace "at the UB2" by "at UB2".
Line 330: Replace "in HMA the two most important meteorological parameter" by "in the HMA the two most important meteorological parameters".
Line 339: Replace "were not be" by "are not".
Line 349: Replace "at the TR3" by "at TR3".
Line 352: Replace "in the Sect." by "in Sect.".
Line 378: Replace "Similar diurnal" by "A similar diurnal".
Line 405: Replace "has been" by "have been".
Line 407: Replace "(2017), reported" by "(2017) reported".
Line 422: Replace "site as" by "sites as".
Line 444: Replace "variation of" by "variations of" and replace "At the TR1" by "At TR1".
Line 451: Replace "1) eBC" by "1) the eBC".
Line 453: Replace "not much" by "not many".
Line 457: Replace "At the TR1-4" by "At TR1-4".
Line 467: Replace "were not" by "was not".
Line 485: Replace "at the TR2" by "at TR2".
Line 489: Replace "at the DH3" by "at DH3".
Line 503: Replace "at the TR1-4" by "at TR1-4".
Line 505: Replace "Since the UB1" by "Since UB1".
Line 514: Replace "elevates eBC" by "elevate eBC".
Line 529: Replace "in years" by "in the years".
Line 537: Replace "which located" by "which were located".
Line 569: Replace "by European" by "by the European".
Line 571: Replace "by University" by "by the University".
Line 578: Replace "commented the" by "commented on the".
Line 583: Replace "Andreae, M." by "Andreae, M. O.".
Lines 653-654: An abbreviated journal name is needed.
Line 761, heading of Table 2: Replace "The traffic" by "Traffic".
Line 771, caption of Figure 1: Replace "The locations of the stations and the density" by "Location of the stations and density".
Line 776, caption of Figure 2: Replace "The statistics" by "Statistics".
Line 779, caption of Figure 2: Replace "above or below" by "above".
Line 780, caption of Figure 2: Replace "The 75th percentiles of eBC" by "The 95th percentiles of the eBC".
Line 784, caption of Figure 3: Replace "The statistics" by "Statistics".
Line 786, caption of Figure 4: Replace "and the trends" by "and trends".

For the Supplement:
Page 1: This page should have as heading: "Supplement of" followed by the title of the Main paper.
Page 1, line 5: Replace "seasons (May – September)" by "(May – September) seasons".
Page 1, line 9: Replace "Fig. S1d-e" by "Figs. S1d-e".
Page 1, line 14, caption of Figure S1: Replace "The monthly" by "Monthly".
Page 2, line 2, caption of Figure S2: Replace "The mean" by "Mean".
Page 2, line 5: Replace "section represents" by "section presents".
Page 3, line 1, heading of Table S1: Replace "at different" by "at the different".
Page 4, line 2: Replace "represents the" by "presents the".
Page 4, line 2: Replace "represents the" by "presents the".
Page 4, line 4: Replace "TR1 located" by "TR1 was located".
Page 4, line 5: Replace "TR3 located" by "TR3 were located".
Page 4, line 9: Replace "the TR2" by "TR2".
Page 4, line 10: Replace "While, TR1" by "While TR1".
Page 4, line 18, caption of Figure S3: Replace "The aerial" by "Aerial".
Page 5, line 2: Replace "represents the" by "presents the", replace "each detached" by "the detached", and replace "DH5, located in" by "DH5 were located in".
Page 5, line 5, caption of Figure S4: Replace "The aerial" by "Aerial".
Page 5, line 9: Replace "represents the" by "presents the".
Page 5, line 14: Replace "after 200" by "behind a 200".
Page 5, line 16: Replace "in middle" by "in the middle".
Page 6, line 2, caption of Figure S5: Replace "The aerial" by "Aerial".
Page 6, line 12, caption of Figure S6: Replace "point indicates" by "points indicates".
Page 7, line 3, caption of Figure S7: Replace "The relation" by "Relation".
Page 7, line 6, caption of Figure S7: Replace "correlation between" by "correlations between".
Page 7, line 12: Replace "if difference" by "if the difference".
Page 7, line 13: Replace "were statistically" by "was statistically".
Page 7, line 15: Replace "got decrease" by "got a decrease".
Page 7, line 18: Replace "to the TR3" by "to TR3".
Page 7, line 21: Replace "difference in" by "differences in".
Page 8, last line, caption of Figure S8: Replace "Figures S8: The statistics" by "Figure S8: Statistics".
Page 9, line 3, caption of Figure S9: Replace "The relation" by "Relation".
Page 9, line 9, caption of Figure S10: Replace "Figures S10" by "Figure S10".
Page 9, line 10, caption of Figure S10: Replace twice "located about" by "was located about".
Page 9, line 12, caption of Figure S10: Replace "count for" by "counts for".
Page 9, line 13, caption of Figure S10: Replace "represents the" by "presents the".
Page 10, line 4: Replace "are represented" by "are presented".
Page 10, line 6, caption of Figure S11: Replace "The statistics" by "Statistics".
Page 11, last line, caption of Figure S13: Replace "is represented" by "is presented".
Page 12, line 1: Replace "represents the" by "presents the".
Page 12, line 2: Replace "i.e." by "i.e.,".

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AR by Krista Luoma on behalf of the Authors (26 Oct 2020) Author's response Manuscript

ED: Publish subject to minor revisions (review by editor) (08 Nov 2020) by Willy Maenhaut

AR by Krista Luoma on behalf of the Authors (17 Nov 2020) Author's response Manuscript

ED: Publish as is (01 Dec 2020) by Willy Maenhaut

AR by Krista Luoma on behalf of the Authors (10 Dec 2020) Manuscript

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Short summary

This study combined black carbon measurements from 15 Finnish sites that represented different environments (traffic, detached housing area, urban background, and regional background). The seasonal and diurnal variations in the black carbon concentration were associated with local emissions from traffic and residential wood burning. The study observed decreasing trends in the black carbon concentration and associated them with decreases in traffic emissions.