Dating of the Dome Fuji shallow ice core based on a record of volcanic eruptions from AD 1260 to AD 2001

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概要

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• We measured the concentration of non-sea-salt sulfate (nssSO^<2->_4) in the Dome Fuji shallow ice core (Antarctica) from the surface to 40 m depth with the aim of dating the core with reference to the record of volcanic eruptions. Three huge spikes related to large-scale volcanic eruptions were detected at depths of 12.5, 29.9, and 38.8 m, correlated to the eruptions of Tambora (AD 1815), Kuwae (AD 1452) and an unknown event (AD 1259), respectively. We identified another nine nssSO^<2->_4 spikes related to accurately dated eruption events. The shallow ice core was dated from AD 1260 to AD 2001 based on these 12 eruption events and the assumption of constant annual snow accumulation in the periods between eruption events. The results yield a maximum correction of ∼20 years compared with the dating proposed in a previous study. The annual accumulation varied within ±∼15% of the average water equivalent value over the study period (25.5 mm).

著者

• Motoyama Hideaki

  National Institute Of Polar Research

• NAKAI Yoichi

  RIKEN (The Institute of Physical and Chemical Research)

• Motizuki Yuko

  Riken

• Makishima Kazuo

  Department Of Physics School Of Science The University Of Tokyo

• Igarashi Makoto

  National Institute Of Polar Research

• Takahashi Kazuya

  Riken Nishina Center 2-1 Hirosawa Wako-shi Saitama 351-0198 Japan.

• Makishima Kazuo

  Department Of Physics School Of Science The University Of Tokyo 7-3-1 Hongo Bunkyo Tokyo 113-0033 Ja

• Motizuki Yuko

  Riken Nishina Center 2-1 Hirosawa Wako-shi Saitama 351-0198 Japan.

• Motoyama Hideaki

  National Institute Of Polar Research 10-3 Midori-cho Tachikawa-shi Tokyo 190-8518 Japan.

• Igarashi Makoto

  National Institute Of Polar Research 10-3 Midori-cho Tachikawa-shi Tokyo 190-8518 Japan.

• Motoyama Hideaki

  National Inst. Of Polar Res. 10-3 Midori-cho Tachikawa-shi Tokyo 190-8518 Jpn

• Nakai Yoichi

  Riken Nishina Center 2-1 Hirosawa Wako-shi Saitama 351-0198 Japan.

• Igarashi Makoto

  National Inst. Of Polar Res. 10-3 Midori-cho Tachikawa-shi Tokyo 190-8518 Jpn

• NAKAI Yoichi

  RIKEN

• TAKAHASHI Kazuya

  RIKEN

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