Abstract
Ice cores recovered from polar ice sheet received and preserved sulfuric acid fallout from explosive volcanic eruptions. DT263 ice core was retrieved from an east Antarctic location. The ice core is dated using a combination of annual layer counting and volcanic time stratigraphic horizon as 780 years (1215–1996 A.D.). The ice core record demonstrates that during the period of approximately 1460–1800 A.D., the accumulation is sharply lower than the levels prior to and after this period. This period coincides with the most recent neoglacial climatic episode, the “Little Ice Age (LIA)”, that has been found in numerous Northern Hemisphere proxy and historic records. The non-sea-salt SO 2−4 concentrations indicate seventeen volcanic events in DT263 ice core. Compared with those from previous Antarctic ice cores, significant discrepancies are found between these records in relative volcanic flux of several well-known events. The discrepancies among these records may be explained by the differences in surface topography, accumulation rate, snow drift and distribution which highlight the potential impact of local glaciology on ice core volcanic records, analytical techniques used for sulfate measurement, etc. Volcanic eruptions in middle and high southern latitudes affect volcanic records in Antarctic snow more intensively than those in the low latitudes.
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Zhou, L., Li, Y., Jihong, Cd. et al. A 780-year record of explosive volcanism from DT263 ice core in east Antarctica. CHINESE SCI BULL 51, 2771–2780 (2006). https://doi.org/10.1007/s11434-006-2164-3
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DOI: https://doi.org/10.1007/s11434-006-2164-3