@article{oai:nipr.repo.nii.ac.jp:00010205, author = {Igarashi, Makoto and Nakai, Yoichi and Motizuki, Yuko and Takahashi, Kazuya and Motoyama, Hideaki and Makishima, Kazuo and Igarashi, Makoto and Nakai, Yoichi and Motizuki, Yuko and Takahashi, Kazuya and Motoyama, Hideaki and Makishima, Kazuo}, issue = {4}, journal = {Polar science, Polar science}, month = {Dec}, note = {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)., 南極ドームふじ浅層コアの表面から深さ40m間について年代軸をつけるため、非海塩性硫酸(nssSO42-)濃度を測定し火山噴火記録と照合した。大規模火山噴火に起因する高濃度のnssSO42-スパイクは、このコアの深さ12.5m、29.9m、そして38.8 mから検出した。それぞれのスパイクは、AD1815に噴火したタンボラ火山、AD1452のクワエ火山、AD1259年の火山名が同定されていない噴火と関連を示した。他にも噴火年代が正確に推定されている火山と関連づけられる9つの顕著なnssSO42-スパイクを検出した。年代を正確に同定したこれら12箇所のnssSO42-スパイクを用いて、AD1260からAD2001年までに相当するコアの年代軸を推定した。本研究で作成した氷の堆積年代は、先行研究で報告された値を最大約20 年修正した。加えてAD1260からAD2001年までの年平均涵養量を25.5 mm、時代毎の振れ幅は±~15%と推定した。}, pages = {411--420}, title = {Dating of the Dome Fuji shallow ice core based on a record of volcanic eruptions from AD 1260 to AD 2001}, volume = {5}, year = {2011} }