Abstract Two Holocene ice core records from East Antarctica (Vostok and EPICA-Dome C) were analysed for dust concentration and size distribution at a tem-poral resolution of 1 sample per 50 years. A series of volcanic markers randomly distributed over the com-mon part of the ice cores (from 9.8 to 3...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
2004
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.504.2574 http://www.scar.org/awards/fellowships/delmonte/Delmonte_2005.pdf |
| Summary: | Abstract Two Holocene ice core records from East Antarctica (Vostok and EPICA-Dome C) were analysed for dust concentration and size distribution at a tem-poral resolution of 1 sample per 50 years. A series of volcanic markers randomly distributed over the com-mon part of the ice cores (from 9.8 to 3.5 kyear BP) ensures accurate relative dating (±33 years). Dust-size records from the two sites display oscillations structured in cycles with sub-millennial and secular scale frequen-cies that are apparently asynchronous. The power spectra of the composite sum (S) of the two dust-size records display spectral energy mostly for 150- to 500-year periodicities. On the other hand, the 200-year band is common to both records and the 200 year compo-nents of the two sites are out-of-phase (100-year lead or |
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