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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| Authors: | Makoto Igarashi Yoichi Nakai Yuko Motizuki Kazuya Takahashi Hideaki Motoyama Kazuo Makishima |
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| Institution: | aNational Institute of Polar Research, 10-3, Midori-cho, Tachikawa-shi, Tokyo 190-8518, Japan;bRIKEN, Nishina Center, 2-1, Hirosawa, Wako-shi, Saitama 351-0198, Japan;cGraduate University for Advanced Studies (SOKENDAI), 10-3, Midori-cho, Tachikawa-shi, Tokyo 190-8518, Japan;dDepartment of Physics, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan |
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| Abstract: | We measured the concentration of non-sea-salt sulfate ( ) 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 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). |
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| Keywords: | Ice core Dating Volcanic eruption record Non-sea-salt sulfate Antarctica |
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