Dust and calcium record in calculated for ice core EPICA Dome C ...

• Main Authors: Lambert, Fabrice, Bigler, Matthias, Steffensen, Jørgen Peder, Hutterli, Manuel A, Fischer, Hubertus
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2012
• Subjects: Ice drill; Dome C; European Project for Ice Coring in Antarctica EPICA; Antarc*; Antarctic; Antarctica; EPICA; ice core; Southern Ocean
• Online Access: https://dx.doi.org/10.1594/pangaea.779311; https://doi.pangaea.de/10.1594/PANGAEA.779311

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 ... : Supplement to: Lambert, Fabrice; Bigler, Matthias; Steffensen, Jørgen Peder; Hutterli, Manuel A; Fischer, Hubertus (2012): Centennial mineral dust variability in high-resolution ice core data from Dome C, Antarctica. Climate of the Past, 8, 609-623 ...