Lambert, Fabrice; Bigler, Matthias; Steffensen, Jørgen Peder; Hutterli, Manuel A; Fischer, Hubertus (2012): Dust and calcium record in calculated for ice core EPICA Dome C. PANGAEA, https://doi.org/10.1594/PANGAEA.779311, Supplement to: Lambert, F et al. (2012): Centennial mineral dust variability in high-resolution ice core data from Dome C, Antarctica. Climate of the Past, 8, 609-623, https://doi.org/10.5194/cp-8-609-2012
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Ice core data from Antarctica provide detailed insights into the characteristics of past climate, atmospheric circulation, as well as changes in the aerosol load of the atmosphere. We present high-resolution records of soluble calcium (Ca2+), non-sea-salt soluble calcium (nssCa2+), and particulate mineral dust aerosol from the East Antarctic Plateau at a depth resolution of 1 cm, spanning the past 800 000 years. Despite the fact that all three parameters are largely dust-derived, the ratio of nssCa2+ to particulate dust is dependent on the particulate dust concentration itself. We used principal component analysis to extract the joint climatic signal and produce a common high-resolution record of dust flux. This new record is used to identify Antarctic warming events during the past eight glacial periods. The phasing of dust flux and CO2 changes during glacial-interglacial transitions reveals that iron fertilization of the Southern Ocean during the past nine glacial terminations was not the dominant factor in the deglacial rise of CO2 concentrations. Rapid changes in dust flux during glacial terminations and Antarctic warming events point to a rapid response of the southern westerly wind belt in the region of southern South American dust sources on changing climate conditions. The clear lead of these dust changes on temperature rise suggests that an atmospheric reorganization occurred in the Southern Hemisphere before the Southern Ocean warmed significantly.
Latitude: -75.100000 * Longitude: 123.350000
Date/Time Start: 1993-01-01T00:00:00 * Date/Time End: 2004-12-31T00:00:00
EDC (EPICA Dome C) * Latitude: -75.100000 * Longitude: 123.350000 * Date/Time Start: 1993-01-01T00:00:00 * Date/Time End: 2004-12-31T00:00:00 * Elevation: 3233.0 m * Recovery: 3300 m * Location: Dome C, Antarctica * Campaign: Dome C * Method/Device: Ice drill (ICEDRILL) * Comment: Drill site is 56 km from the site of a previous Dome C core that provided records extending into the last glacial period, and 560 km from the site of the Vostok cores. The completion of the Dome C core was delayed when the first drilling became stuck at 788 m in 1999 (EDC96).
Datasets listed in this publication series
- Lambert, F; Bigler, M; Steffensen, JP et al. (2012): EDC calcium and dust concentrations. https://doi.org/10.1594/PANGAEA.780540
- Lambert, F; Bigler, M; Steffensen, JP et al. (2012): EDC dust flux 800 kyr (25 yr mean). https://doi.org/10.1594/PANGAEA.778213
- Lambert, F; Bigler, M; Steffensen, JP et al. (2012): EDC dust flux 800 kyr (full resolution). https://doi.org/10.1594/PANGAEA.779310
- Lambert, F; Bigler, M; Steffensen, JP et al. (2012): EDC dust laser signal (24-769.5 m). https://doi.org/10.1594/PANGAEA.780541