Holocene electrical and chemical measurements from the EPICA-Dome C ice core

Udisti, R.; Becagli, S.; Castellano, E.; Mulvaney, R.; Schwander, J.; Torcini, S.; Wolff, E. (2000). Holocene electrical and chemical measurements from the EPICA-Dome C ice core. Annals of glaciology, 30, pp. 20-26. International Glaciological Society 10.3189/172756400781820750

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The comparison between electric (electric-conductivity measurement (ECM) and dielectric profiling (DEP)) and chemical sulphate and chloride) depth profiles along the first 400 m of the EPICA-Dome C ice core revealed a very good fit, especially for peaks related to volcanic emissions. From the comparison between these profiles, a dominant contribution of sulphuric acid to the ionic balance of Antarctic ice for the Holocene was confirmed. A progressive increase with depth was observed for chloride concentrations, showing a change of relative contribution between sulphate and chloride. A higher increase of chloride was evident between 270 and 360 m depth, probably due to a change in source or transport processes or to an increase of the annual snow-accumulation rate. The DEP, ECM and sulphate ice signatures of Tambora (AD 1816) and El Chichon (?) (AD 1259) eruptions are described in detail. A characteristic peak series, due to HCl deposition, was identified at 103–109 m depth from the ECM, DEP and chloride profiles.

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