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

Page 2, line 1: Replace "in literature" by "in the literature".
Page 2, line 9, and on 15 other occasions within the manuscript: Replace "e.g. " by "e.g., ".
Page 2, line 21, and further within the manuscript: When "biomass burning" is used as an adjective, there should be a hyphen between "biomass" and "burning", thus "biomass-burning".
Page 3, line 33: Replace "2. Materials" by "2 Materials".
Page 5, line 29: There should be a space after each of the three semicolons.
Page 5, line 32: The subscript "wb" should be capitalized.
Page 6, line 28: Replace "on wavelength" by "on the wavelength".
Page 7, line 18: Replace "(2010), Herich" by "(2010); Herich".
Page 8, lines 21, 26, and 33: Is there a particular reason why "bb" is used here as subscript? Would it not be better to replace is by the subscript "WB", which is used elsewhere.
Page 8, line 37, page 9, line 27, and page 9, line 36: Three different notations are used for the EUSAAR2 protocol. Consistency is needed.
Page 9, line 33: Replace "Results of" by "The results of".
Page 9, line 39: Replace "2006, Genberg" by "2006; Genberg".
Page 9, line 39: Replace "and absorption" by "and the absorption".
Page 10, line 2: Replace "2013, Bond" by "2013; Bond".
Page 10, line 6: Replace "measurements, allows" by "measurements allows".
Page 10, line 20: Replace "and analyses" by "and analysis".
Page 10, line 34: Replace "with above" by "with the above".
Page 11, line 7: Replace "are attainable" by "is attainable".
Page 11, line 19: Replace "Aethalometer model" by "the Aethalometer model".
Page 11, lines 27-28: It is unclear what "as obtained in Sect. 3.2.1" is doing here (we are in Section 3.2.1). I recommend removing it.
Page 12, line 22: Replace "i.e. 1.8" by "i.e., 1.8".
Page 12, line 41: Replace "(2010), Herich" by "(2010); Herich".
Page 13, lines 3 and 4: Replace "Table 4" by "Table 3".
Page 13, line 11: Replace "Table 4a" by "Table 3a".
Page 13, line 13: Replace "Table 4b" by "Table 3b".
Page 13, line 17: Replace "due the" by "due to the".
Page 13, line 22: Replace "affects lower" by "affect lower".
Page 14, line 8: Replace "for of EBC" by "for EBC".
Page 14, line 25: Replace "ZUR days)" by "ZUR days".
Page 15, line 7: Replace "are reported" by "is reported".
Page 15, line 9: Replace "remain elusive" by "remains elusive".
Page 15, line 11: Replace "apportion CM" by "apportion the CM".
Page 15, line 26: Replace "4. Conclusions" by "4 Conclusions".
Page 15, line 34: Replace "Source apportionment" by "The source apportionment".
Page 16, line 1: Replace "0.8, and" by "0.8 and".
Page 16, line 2: Replace "Aethalometer (~2) models" by "Aethalometer models (~2)".
Page 16, line 12: Replace "Results indicate" by "The results indicate".
Page 16, line 20: Replace "i.e. average" by "i.e., average".
Page 17, line 4: Replace "T. C., and" by "T. C. and".
Page 18, line 10: Replace "Energy Statistics" by "Eurostat, Energy Statistics".
Page 23, line 3: Replace "L. R. and" by "L. R., and".
Page 25, line 8: Replace "assuming C value" by "assuming a C value".
Page 27, Figure 5 and caption: The 4 panels are not denoted by (a), (b), and so on. Besides, there are errors in the caption when referring to the 4 panels.
Page 29, line 10: There should be a period (.) after "(2014)".
Page 29, line 12: Replace "(2011), EMPA" by "(2011); EMPA".
Page 29, line 16: Replace "in surrounding of station" by "in the surrounding of the station".
Page 29, line 20: Replace "in near" by "in the near".

The following alterations are still needed for the Main text before the manuscript can be published in ACP.
Page 2, lines 9 and 24: Replace "biomass-burning" by "biomass burning"; note that there should only be a hyphen between "biomass" and "burning" when " biomass burning" is used as an adjective.
Page 8, lines 16, 21, and 25: Replace "biomass-burning" by "biomass burning".
Page 9, line 12: Replace "biomass-burning" by "biomass burning".
Page 15, line 19: Replace "biomass-burning" by "biomass burning".
Page 27, caption of Figure 5, line 9: It is unclear what is meant by "The black dashed line in (c) represents". Should it perhaps be replaced by "The black dashed line in the lower right panel represents"?