Calcium and sodium concentrations of the Talos Dome ice core, Antarctica, supplement to: Schüpbach, Simon; Federer, Urs; Kaufmann, Patrik R; Albani, S; Barbante, Carlo; Stocker, Thomas F; Fischer, Hubertus (2013): High-resolution mineral dust and sea ice proxy records from the Talos Dome ice core. Climate of the Past, 9(6), 2789-2807

DOI

In this study we report on new non-sea salt calcium (nssCa2+, mineral dust proxy) and sea salt sodium (ssNa+, sea ice proxy) records along the East Antarctic Talos Dome deep ice core in centennial resolution reaching back 150 thousand years (ka) before present. During glacial conditions nssCa2+ fluxes in Talos Dome are strongly related to temperature as has been observed before in other deep Antarctic ice core records, and has been associated with synchronous changes in the main source region (southern South America) during climate variations in the last glacial. However, during warmer climate conditions Talos Dome mineral dust input is clearly elevated compared to other records mainly due to the contribution of additional local dust sources in the Ross Sea area. Based on a simple transport model, we compare nssCa2+ fluxes of different East Antarctic ice cores. From this multi-site comparison we conclude that changes in transport efficiency or atmospheric lifetime of dust particles do have a minor effect compared to source strength changes on the large-scale concentration changes observed in Antarctic ice cores during climate variations of the past 150 ka. Our transport model applied on ice core data is further validated by climate model data.

Identifier
DOI http://dx.doi.org/doi:10.1594/PANGAEA.833044
Metadata Access http://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite3&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.833044
Provenance
Creator Albani, S;Barbante, Carlo;Stocker, Thomas F;Kaufmann, Patrik R;Fischer, Hubertus;Schüpbach, Simon;Federer, Urs
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2014
Rights Creative Commons Attribution 3.0 Unported (CC-BY)
Representation
Language English
Resource Type Supplementary Dataset
Format text/tab-separated-values
Coverage
Discipline Earth System Research
Spatial Coverage (73S,159E)
Temporal Point 2005-01-01T11:59:59Z