The authors have done a good job responding to the reviewer comments and revising the paper.

Major comment:
In responding to reviewer comments, results of the EC-tracer method have been added related to the contribution of secondary sources to organic aerosol. The addition is very brief and is not rigorously discussed, unlike the other results presented in the paper. Thus, I ask the authors to develop these results further by separating it from the section dedicated to biomass burning contributions to OC and providing a discussion of these results in relation to prior studies in the region (as has been done for biomass burning).

Detailed/editorial comments are:
1. It is not clear if the IPCC estimates of radiative forcing include indirect effects (or not), please clarify this in the first paragraph of the introduction.
2. Line 179 should read “but no target compounds were detected.”
3. Line 182 should read “for an average total standard volume of 121 m3.” (Note: the units are cubic meters, not inverse cubic meters.)
4. Line 185 “gradient” should be deleted. Instead, “HPLC-grade dicholoromethane and methanol…”
5. Line 2013 should read “which were…”
6. In section 3.1 please clarify the meaning of the errors associated with the average values – are these the standard deviation?
7. Line 250 should include one standard deviation with the average OC/EC ratio.
8. At the beginning of the discussion the OC/EC data, please restate that the measurements in this study are TSP.
9. Line 263, “bioaerosols” without the hyphen.
10. At line 420, the results of the EC tracer method should be presented in a different subsection (either a new section numbered 3.4 or with the ECOC data.). It does not fit within the “biomass burning contribution to OC” part, as it focuses on secondary sources.
11. Further, results of the EC tracer method need to be discussed in relation to prior studies in the region. It could also be more robust if correlation with secondary inorganic aerosol (e.g., sulfate) were performed and discussed.
12. In Table 1, please add either to the table or the caption which months are included in the “pre-monsoon, monsoon, post-monsoon, and winter” sections.
13. In Figure 8, please leave a gap between missing data (e.g. May) rather than when connecting with a line.