Measurement of cosmogenic 36Cl in the Dome Fuji ice core, Antarctica: Preliminary results for the Last Glacial Maximum and early Holocene

• DOI: 10.1016/j.nimb.2009.10.131
• Publication Date: 2009-10-09T11:08:11Z
• Authors: Kimikazu Sasa; Yuki Matsushi; Yuki Tosaki; Michiko Tamari; Tsutomu Takahashi; Yasuo Nagashima; Kazuho Horiuchi; Hiroyuki Matsuzaki; Yasuyuki Shibata; Motohiro Hirabayashi; Hideaki Motoyama
• Keywords: 13. Climate action; 01 natural sciences; 0105 earth and related environmental sciences

Abstract This paper reports the results of trial measurements of the concentration of cosmogenic 36Cl in an ice core recovered from Dome Fuji Station, Antarctica. Ten ice samples were extracted from depths corresponding to the Last Glacial Maximum and the early Holocene, with each sample comprising ∼150 g for a core length of 0.5 m (∼30–40 yr resolution). Analyses of 36Cl concentrations by accelerator mass spectrometry were successfully performed within ±10% precision, even for samples with low 36Cl/Cl values (∼3 × 10–14). The average 36Cl concentrations were 16 × 103 atoms g–1 for the Last Glacial Maximum, and 7 × 103 atoms g–1 for the early Holocene. The apparent 36Cl depositional flux at Dome Fuji Station during these periods was estimated to be approximately 2.5–3.5 × 104 atoms cm–2 yr–1.