VOLCANIC RECORDS AND DATING OF THE UPPER HALF OF THE H15 ICE CORE FROM MIZUHO PLATEAU, EAST ANTARCTICA
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概要
- 論文の詳細を見る
Two closely-spaced peaks of electrical conductivity were found at depths between 45 and 50m of the 120-m long ice core drilled at site H 15 in Antarctica by the 32nd Japanese Antarctic Research Expedition in 1991. Chemical analysis of the core containing these peaks revealed that the ice layers were characterized by high acidity and high sulfate concentration suggesting volcanic signals. In order to identify these characteristics, the core was dated using two methods : (1) counting the number of high electrical conductivity peaks resulting from seasonal variations of SO_4^<2-> and NO_3^-, and (2) an empirical model of firn densification. The dating results suggest that the high conductivity is related to deposition of acidic aerosols from the volcanic eruptions of Tambora in 1815 A. D. and of an unknown volcano in 1809 A. D.
- 国立極地研究所の論文
著者
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Fujii Yoshiyuki
National Institute of Polar Research, Research Organization of Information and Systems
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KUSAKABE MINORU
Institute for Study of the Earth's Interior, Okayama University
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Fujii Yoshiyuki
National Institute Of Polar Research
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Fukuoka Takaaki
Department of Environmental Systems, Rissho University
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Kusakabe Minoru
Institute For Study Of The Earth's Interior Okayama University
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KOHNO Mika
Institute for Study of the Earth's Interior, Okayama University
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Kohno Mika
Institute For Study Of The Earth's Interior Okayama University
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Fukuoka Takaaki
Department Of Chemistry Faculty Of Science Gakushuin University
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Kusakabe Minoru
Institute For Study Of The Earth Interior Okayama University
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KUSAKABE Minoru
Institute for Study of the Earth's Interior, Okayama University
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- Preface
- Glaciological Data Collected by the 30th, 31st and 32nd Japanese Antarctic Research Expeditions in 1989-1991
- 5. Surface Meteorological Data during Oversnow Traverses(Glaciological Data Collected by the 37th Japanese Antarctic Research Expedition during 1996-1997)
- 4. Snow Temperature Data at Dome Fuji Station(Glaciological Data Collected by the 37th Japanese Antarctic Research Expedition during 1996-1997)
- 3. Surface Snow Density around Dome Fuji Station(Glaciological Data Collected by the 37th Japanese Antarctic Research Expedition during 1996-1997)
- 2. Net Accumulation of Snow at Dome Fuji Station(Glaciological Data Collected by the 37th Japanese Antarctic Research Expedition during 1996-1997)
- 1. Outline of Field Observations during 1996-1997(Glaciological Data Collected by the 37th Japanese Antarctic Research Expedition during 1996-1997)
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- Geomorphological and glaciological aspects around the highest dome in Queen Maud Land, East Antarctica
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