TITLE:
Mineral and Sea-Salt Aerosol Fluxes over the Last 340 kyr Reconstructed from the Total Concentration of Al and Na in the Dome Fuji Ice Core
AUTHORS:
Hironori Sato, Toshitaka Suzuki, Motohiro Hirabayashi, Yoshinori Iizuka, Hideaki Motoyama, Yoshiyuki Fujii
KEYWORDS:
Ice Core; Antarctica; Dome Fuji; Climate Change; Aerosol Flux; Full Digestion
JOURNAL NAME:
Atmospheric and Climate Sciences,
Vol.3 No.2,
April
30,
2013
ABSTRACT:
A quantitative analysis of the total concentrations of Al and Na in
the Antarctic ice sheet during the past 340 kyr was performed
by applying the acid digestion method to the Dome Fuji ice core. Atmospheric
fluxes of mineral and sea-salt aerosol to Dome Fuji were calculated from the
total concentration. The average fluxes of mineral aerosol to Dome Fuji in the
periods of glacial maximum, 18.6 ± 10.1 mg·m–2·yr–1, were larger
than the value in the interglacial periods, 3.77 ± 2.20 mg·m–2·yr–1.
Conversely, the fluxes of sea-salt have no significant difference between the
average value of glacial maximum, 130 ± 55 mg·m–2·yr–1,
and that of interglacial, 111 ± 54 mg·m–2·yr–1. The
results obtained in this study suggest that the variation of mineral aerosol
flux in Dome Fuji, together with climate change, was much larger than that of
sea-salt aerosol flux. This result may have occurred because the variety in
the intensity of the source and transport during the glacial-interglacial
cycle is more significant for mineral aerosol than that for sea-salt aerosol.