|Overall I think this revision is a much stronger version. I have outlined a few major and minor comments for the authors to consider. |
Page 7 line 35: I do not think this paragraph accurately reflects the Kbb profile observed. Rather I would describe the Kbb profile as showing an increase beginning at 4ka to level but fluctuating values from 3.5 to 1.25 ka, followed by an increase from 1.25 to .75 ka.
Page 7 line 35 to page 8 line 9: I still encourage the authors to avoid discussion of individual spikes in the records. Considering that very few of the spikes in the Kbb and Levoglucosan record agree, I do not see the added value of the discussion on Page 7 lines 35-page 8 line 9. I think the authors should shorten this discussion and lead directly into the following paragraph that states “the individual levoglucosan and Kbb spikes occur during the same time…”
Section 3.2: I appreciate the authors approach to use dust as a potential indicator of the source of biomass burning. However, it is also worth noting that model and observation studies from Antarctica have shown that South America is a source of biomass burning aerosols to Antarctica.
General: When describing time periods, I would encourage the authors to describe time from oldest to youngest. For example, in the Abstract line 18 it would make more sense to say “between 2500 to 1500 year BP”. This is observed though out the manuscript and I will not point out all of the instances.
Page 7 line 4: This introductory sentence is confusing. This paragraph is about other factors influencing the Levoglucosan and therefore setting up the discussion about the Potassium record in the following paragraph. I think a more general introductory sentence here would be more appropriate.
Page 8 line 10: This introductory sentence is wordy and confusing. I would consider instead “the individual levoglucosan and Kbb spikes occur during the same time periods which correspond to…”
Figure 1: The caption should include “Talos Dome (TD) and Dome C (DC), Taylor Dome (Taylor D)”. The labels for South America, South Africa, Australia and New Zealand should be made white or removed.
Figure 3 caption: I would include in the figure caption “Red dots on map indicate the location of the charcoal records”
Figure 4 caption: The authors do not need to capitalize “Temperature” or “Dust” when following a comma.
Figure 5 caption: “Carbon” does not need to be capitalized when following a comma.