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The Holocene sea-salt trace ion chemistry record from Law Dome, East Antarctica

The Holocene sea-salt trace ion chemistry record from Law Dome, East Antarctica
Christopher T. Plummer

Authors

Christopher T. Plummer1,2, Mark A.J. Curran2,3, Tas D. van Ommen2,3, Tessa .R. Vance2, Andrew D. Moy2,3, Vin I. Morgan2, Paul A. Mayewski4

  1. Institute for Marine and Antarctic Science, University of Tasmania, Hobart, Tasmania, Australia
  2. Antarctic Climate and Ecosystems Cooperative Research Centre, Hobart, Tasmania, Australia
  3. Australian Antarctic Division, Kingston, Tasmania, Australia
  4. Climate Change Institute, University of Maine, Orono, USA

Abstract

Trace ion chemistry records from ice cores provide a valuable archive of past climate, with snow preserving atmospheric conditions during deposition. Trace ion analysis has been performed on ice from the Law Dome, Dome Summit South (DSS) ice core site in East Antarctica, covering the 12ky BP Holocene epoch. The data have a resolution from sub-annual over the last 2300 years, to 30 years at 12ky BP, and provide a well-resolved Holocene chemistry record. The sea-salt species of Cl- and Na+ are useful indicators of variation in atmospheric circulation patterns, with links recognized previously between sea-salt concentrations and regional wind strength, Southern Annular Mode (SAM) and El Niño–Southern Oscillation (ENSO). Here we present initial findings from analysis of DSS Cl- and Na+ records and examine their variability through the Holocene. Comparisons with other Holocene sea-salt records from the East Antarctic sector (TALOS dome and EDC ice cores) are used to explore regional-scale variability.

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This page was last modified on 4 September 2013.