Elemental compositions, geometric information and ion concentrations of dust and sea salt in the Dome C and Dome Fuji ice core for the Termination I ...

• Main Authors: Oyabu, Ikumi, Iizuka, Yoshinori, Kawamura, Kenji, Wolff, Eric, Hansson, Margareta
• Format: Dataset
• Language: English
• Published: Arctic Data archive System (ADS), Japan 2020
• Subjects: PALEOCLIMATE>ICE CORE RECORDS>IONS; PALEOCLIMATE>ICE CORE RECORDS>PARTICULATE MATTER; ATMOSPHERE>AEROSOLS>DUST/ASH/SMOKE; Dome Fuji; EPICA; ice core
• Online Access: https://dx.doi.org/10.17592/001.2019121201; https://ads.nipr.ac.jp/dataset/A20191212-001

We analyzed the chemical compositions of dust and sea-salt particles in the EPICA Dome C (EDC) ice core during 26-7 kyr BP using an ice-sublimation technique, and compared the results with existing data of the Dome Fuji (DF) ice core. Combined with ion concentration data, our data suggested similar sea-salt fluxes in both cores and significantly lower dust flux in the EDC core. The differences in modal size and aspect ratio of dust particles between the two cores support the dominance of Patagonian source suggested by earlier works. The compositions of calcic dust showed major change at ~17 kyr BP, possibly reflecting a relative increase in dust transported via the upper troposphere. The calcium sulfate fraction was higher in the DF core than in the EDC core after ~17 kyr BP, suggesting that higher Patagonian dust contribution to the DF region. Abundant NaCl particles were found in the DF core in comparison with the EDC core from the LGM to early Holocene, possibly because of the high concentration of ...