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Dome C, Antarctica
Reference
Castellano, E., Becagli, S., Hansson, M., Hutterli, M., Petit, J.R., Rampino, M.R., Severi, M., Steffensen, J.P., Traversi, R. and Udisti, R. 2005. Holocene volcanic history as recorded in the sulfate stratigraphy of the European Project for Ice Coring in Antarctica Dome C (EDC96) ice core. Journal of Geophysical Research 110: Do6114, doi:10.1029/2004JD005259.

Description
The authors analyzed sulfate ice core stratigraphy from Dome C, Antarctica (75.10S, 123.40E) to obtain a record of Holocene volcanic eruptions, which they compared with other volcanic indices throughout Antarctica. Sulfate depositional fluxes of individual volcanic events were found to vary greatly among the different sites, which variation was attributed to changes in atmospheric circulation driven by climate forcing; and the team of ten researchers concluded that "changes in the extent and intra-Antarctic variability of volcanic depositional fluxes may have been consequences of the establishment of a Medieval Warming-like period that lasted [from about 1000] until about 1500 AD."