Multiple sources for tephra from AD 1259 volcanic signal in Antarctic ice cores

Antarctic temperatures over the past two centuries from ice cores

[1] We present a reconstruction of Antarctic mean surface temperatures over the past two centuries based on water stable isotope records from high-resolution, precisely dated ice cores. Both instrumental and reconstructed temperatures indicate large interannual to decadal scale variability, with the dominant pattern being anti-phase anomalies between the main Antarctic continent and the Antarct...

A New Technique for Dielectric Logging of Antarctic Ice Cores

Signal variability in replicate ice cores

Replicate ice cores have been drilled about 10m apart for the top 790m of the ice sheet at Dome C, Antarctica. This provides an opportunity to examine inter-core variation of the signal for identical events, based on dielectric profile (DEP) comparisons. Comparison of the signal from the same core (a section 48m long), measured 1 year apart, showed good reproducibility, with peak heights varyin...

Tephrochronology of the Siple Dome ice core, West Antarctica: correlations and sources

A total of 24 tephra-bearing volcanic layers have been recognized between 550 and 987 m depth in the Siple Dome A (SDM-A) ice core, in addition to a number already recognized tephra in the upper 550 m (Dunbar et al., 2003; Kurbatov et al., 2006). The uniform composition and distinctive morphological of the particles composing these tephra layers suggest deposition as a result of explosive volca...

Orbital forcing and air isotopic composition in Antarctic ice cores

Introduction Conclusions References