Dear authors,

I am pleased to let you know that I am happy to accept your manuscript subject to some additional minor revisions. The two original reviewers assessed your revisions and considered these as adequate. I have the following minor suggestions and requests:

- In the abstract and elsewhere, please refer to the "2014-2015 Holuhraun eruption". Bárðarbunga is the volcanic system at which subsidence occurred, but the eruption you study is officially referred to as "2014-2015 Holuhraun eruption"

- Abstract, line 26: Before reading the entire paper, I found it was not clear me what you mean by 'established sulfate proxy' - I recommend you rewrite this sentence so it's understandable for readers who have not read the entire text and/or are not familiar with Karymsky volcano.

- The last sentence of the abstract is to my mind a little cumbersome and contains little information unless one reads the entire paper. I recommend spelling out what these "similar plume components" are or you state the period prior to 2011 you refer to in terms of similarities.

- Section 5, line 22: strictly speaking Holuhraun was a "sulfur-rich eruption" (although I realise you refer to what you detect)

- Figures:

o Figures 2, 3, 4, and 7 all need to have longitude and latitude coordinates added
o Figure 5: please state the AOD wavelength and add units to each panel where appropriate
o Figure 8: for the Holuhraun inset, I would suggest using the words 'sulfur-rich plumes' to better reflect the entirety of the plume constituents.