Periodicities of palaeo-climatic records extracted from the Dome Fuji deep core

元データ 国立極地研究所

概要

The Antarctic ice sheet preserves palaeo-climate information in the form of physical and chemical stratigraphy. A deep ice core was continuously drilled down to a depth of 2503m at Dome Fuji Station, East Dronning Maud Land, Antarctica, during the 1993-97 JARE inland operations. A time scale for the Dome Fuji core is calculated from past accumulation rates and an ice flow model. A depth-age profile was obtained for the past 320kyr back in time. The obtained palaeo-temperature profile shows the past three glacial and interglacial periods. The power spectrum for oxygen isotope variation for 320kyr shows three dominant cycles of 107kyr, 40kyr and 21kyr. Each of these three cycles is similar to Milankovitch cycles. Moving-window spectrum analysis, using a 130kyr window stepped by 10kyr over the past 320kyr, found these main cycles in every age. Variations of other chemical concentrations were also recovered from the Dome Fuji ice core, and are inversely correlated to the temperature profile. Concentrations of terrestrial and marine origin substances are high in glacial periods, and low in interglacial periods. Over the past 320kyr, the dominant periodicities of temperature were also detected in almost all chemical records.

著者

藤井 理行 国立極地研究所
Motoyama Hideaki National Institute of Polar Research, Research Organization of Information and Systems
Watanabe Okitsugu National Institute of Polar Research, Research Organization of Information and Systems
Fujii Yoshiyuki National Institute of Polar Research, Research Organization of Information and Systems
Kamiyama Kokichi National Institute of Polar Research, Research Organization of Information and Systems
Igarashi Makoto National Institute of Polar Research, Research Organization of Information and Systems
Satow Kazuhide Nagaoka National College of Technology
Furukawa Teruo National Institute of Polar Research
Kanamori Satoru Atmospheric and Hydrospheric Research Institute(emeritus), Nagoya University
Kawada Kunio Center For Atmospheric And Oceanic Studies Graduate School Of Science Tohoku University
Kawamura Kenji Center For Atmospheric And Oceanic Studies Graduate School Of Science Tohoku University
古川 晶雄 National Institute Of Polar Research Research Organization Of Information And Systems
本山 秀明 極地研
Watanabe O National Institute Of Polar Research Research Organization Of Information And Systems
Watanabe Okitsugu National Institute Of Polar Research
Kamiyama K National Institute Of Polar Research Research Organization Of Information And Systems
Kamiyama Kokichi National Institute Of Polar Research
Kawaguchi Sadao Nagaoka National College Of Technology
Shimohara Kimiko Kitami Institute of Technology
本山 秀明 情報・システム研究機構 国立極地研究所
Motoyama Hideaki National Institute Of Polar Research
本山 秀明 National Institute of Polar Research
Kanamori Satoru Institute For Hydrospheric And Atmospheric Sciences Nagoya University
Kawamura K Center For Atmospheric And Oceanic Studies Tohoku University
Kawada K Toyama Univ. Toyama
Satow Kazuhide Nagaoka College Of Technology
Fujii Yoshiyuki National Institute Of Polar Research
Watanabe Okitsusgu National Institute of Polar Research
Kanamori Satoru National Institute of Polar Research
Satow Kazuhide Nagoya Technical College
Kawada Kunio Department Earth Science Toyama University
Kamiyama Kokichi National Institute Of Polar Research Research Organization Of Information And Systems
Watanabe Okitsugu National Institute Of Polar Research Research Organization Of Information And Systems
Fujii Y National Inst. Polar Res. Tokyo
Shinbori K Hokkaido Univ. Sapporo
Koga S National Inst. Resources And Environment Tsukuba
Igarashi Makoto National Institute Of Polar Research
Motoyama Hideaki National Inst. Of Polar Res. 10-3 Midori-cho Tachikawa-shi Tokyo 190-8518 Jpn
Kanamori Satoru Atmospheric And Hydrospheric Research Institute(emeritus) Nagoya University
Igarashi Makoto National Inst. Of Polar Res. 10-3 Midori-cho Tachikawa-shi Tokyo 190-8518 Jpn
Igarashi M National Institute Of Polar Research

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