Dear authors,

In addition to edits made in response to the reviewer's comments and described in your responses, please also take the comments below into account for your revised manuscript.

L96-97: Here, the 1452/53 and 1458/59 events are linked to NH and SH low latitude origins, respectively. But where does this level of precision come from? Usually, ice core sulfate is used to attribute to one of 3 regions, tropics, NH extratropics or SH extratropics. Toohey et al. (2016) attempted to provide more precise estimate of latitude for the 536 eruption based on model results and identified eruptions, (in supplemental information), but there is a fair amount of variability in both which makes this difficult. In any case, the latitudinal attributions suggested here need evidence: some discussion of the relationships between Antarctic and Greenland sulfate flux would help.

L107: by “SH” here, do you mean SH tropical? This is confusing, since, as stated above, most readers would assume a binning into the usual 3 categories, in which case “SH” would be interpreted as SH extratropical.

L341: There is inconsistent reference to the 2nd event of the 1450s: sometimes referred to as “1458” and sometimes “1458/59”. If the same thing is meant in all cases, it should be made consistent. And if the latter term is used, it should be explained what it means—is the two year range an uncertainty in the eruption year, or does the deposition occur over both years, or something else? (The same thing happens a few times for 1452/53).

L354: please specify whether the 30-year running mean is centered on the year of the calculated anomaly or is the 30 years before the year.

L356: Please double check these numbers, especially the anomaly for SCH2015, in Fig 6b the anomaly for SCH2015 seems to be much closer to zero than -0.35degC (perhaps it’s -0.035degC?).

L385: Again, by “Northern Hemisphere” do you mean north of the equator but in the tropics?

L421: Miller supports the intensification of the LIA in the 15th Century, but not the inception: they suggest the mid 13th Century for the inception. Schurer's definition of the LIA to start in 1450 seems to be directly following the IPCC AR5 report, which provides little objective reasoning for the date. The best I know of is Owens et al. (2017).

L487: It’s relatively well known that the VEI is not a great predictor of climate impact, see the discussion in Robock 2000. The VEI is primarily a measure of the volume of tephra emitted, while the climate impact is most closely related to the amount of sulfur injected into the stratosphere. These two quantities can be loosely correlated, but aren’t going to scale directly for all eruptions. In various places throughout the manuscript, V1477 is described as very “explosive”. To a reader like me, this implies a rapid eruption rate, and vigorous eruption plume and likely stratospheric injection. But this might not be the case. It would be helpful if the term “explosive” is defined in the manuscript, especially in regards to the V1477 eruption. Is there evidence of a high eruption plume? Doe the fact that it was a fissure eruption (of substantial length) reduce the probability of a strong eruption plume? Or does the description of the eruption as “most explosive” (line 155) strictly refer to the VEI value? (If the last, I would suggest being specific and referring to the eruption as having the largest VEI).

L495: Downwelling over the polar cap during winter is rather slow compared to horizontal mixing. Toohey et al. (2019) found a small difference in radiative forcing between winter and summer high latitude, lower stratospheric eruption simulations. Season of eruption may be part of the story, but there's not much evidence to suggest the season is a major factor in explaining the difference between V1477 and eruptions like Laki. To me, most likely is that there is significant uncertainty in the stratospheric sulfur injection for the different eruptions based on the ice cores.

Owens, M. J., Lockwood, M., Hawkins, E., Usoskin, I., Jones, G. S., Barnard, L., Schurer, A. and Fasullo, J.: The Maunder minimum and the Little Ice Age: an update from recent reconstructions and climate simulations, J. Sp. Weather Sp. Clim., 7, A33, doi:10.1051/swsc/2017034, 2017.

Robock, A.: Volcanic Eruptions and Climate, Rev. Geophys., 38(2), 191–219, doi:10.1029/1998RG000054, 2000.

Toohey, M., Krüger, K., Schmidt, H., Timmreck, C., Sigl, M., Stoffel, M. and Wilson, R.: Disproportionately strong climate forcing from extratropical explosive volcanic eruptions, Nat. Geosci., 12(2), 100–107, doi:10.1038/s41561-018-0286-2, 2019.

Toohey, M., Krüger, K., Sigl, M., Stordal, F. and Svensen, H.: Climatic and societal impacts of a volcanic double event at the dawn of the Middle Ages, Clim. Change, 136(3–4), 401–412, doi:10.1007/s10584-016-1648-7, 2016.

Thank you for addressing the reviewer and editor comments, the manuscript is much improved and ready to move forward.