Ice core analyses and borehole temperature measurements at the drilling site on Asgardfonna, Svalbard, in 1993 (scientific paper)

元データ 国立極地研究所

概要

Two ice cores (184.62m and 49.21m depth) were drilled in the middle area of Åsgardfonna, northeastern part of Svalbard, by the Japanese Arctic Glaciological Expedition, 1993 (JAGE '93). None of them reached to the bedrock. Stratigraphic observation and bulk density measurement were carried out for each ice core at the drilling site. The depth of the firn-ice transition was about 6m. Transparent layers and low density layers indicated the occurrence of several warm and cold climatic conditions in this region. In order to find the cause of the time gap observed in the ice core from Hoghetta, on top of Åsgardfonna, the stratigraphy of both ice cores was compared with each other. Temperature measurements in the boreholes showed a unique profile, that is, it had negative temperature gradient at depths from about 30m to 130m. Numerical calculation using a steady state model was applied to reconstruct the unique profile of ice temperature.

著者

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
Kawamura Kenji Center For Atmospheric And Oceanic Studies Graduate School Of Science Tohoku University
Shiraiwa T Disaster Prevention Research Institute Kyoto University
Takahashi Akiyoshi Geo Tecs Co. Ltd.
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
Saito T Institute Of Low Temperature Science Hokkaido University
Kawada K Toyama Univ. Toyama
Fujii Yoshiyuki National Institute Of Polar Research
SUZUKI Toshitaka Department of Earth and Environmental Sciences, Faculty of Science, Yamagata University
Fujii Yoshiuki National Institute of Polar Research
Watanabe Okitsusgu National Institute of Polar Research
IGARASHI Makoto Department of Agricultural Chemistry, The University of Tokyo
Takahashi Shuhei Department Of Civil Engineering Kitami Institute Of Technology
UCHIDA Tsutomu Hokkaido National Industrial Research Institute
Takahashi Akiyoshi Geo. Tec. Co. Ltd.
Yoshimura Yoshitaka Biological Laboratory, Faculty of Science, Tokyo Institute of Technology
Kawada Kunio Department Earth Science Toyama University
Kamiyama Kokichi National Institute Of Polar Research Research Organization Of Information And Systems
Suzuki Toshitaka Department Of Chemistry Faculty Of Science Yamagata University
Yoshimura Yoshitaka Biological Laboratory Faculty Of Science Tokyo Institute Of Technology
Suzuki Toshitaka Faculty Of Science Yamagata University
Igarashi M National Institute Of Polar Research

関連論文

▼もっと見る