Study on the dynamics of the englacial and subglacial environment of the ice sheet in East Antarctica using ice sounding radars

• Project/Area Number: 16310016
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Environmental dynamic analysis
• Research Institution: National Institute of Polar Research
• Principal Investigator: FUJITA Shuji National Institute of Polar Research, Division for Research and Education, Associate Professor, 研究教育系, 助教授 (30250476)
• Co-Investigator(Kenkyū-buntansha): FUJI Yoshiyuki National Institute of Polar Research, Director General, 所長 (20125214) ; FURUKAWA Teruo National Institute of Polar Research, Division for Research and Education, Research Associate, 研究教育系, 助手 (70261120) ; MOTOYAMA Hideaki National Institute of Polar Research, Division for Research and Education, Professor, 研究教育系, 教授 (20210099)
• Project Period (FY): 2004 – 2006
• Project Status: Completed (Fiscal Year 2006)
• Budget Amount: ¥8,000,000 (Direct Cost: ¥8,000,000); Fiscal Year 2006: ¥1,300,000 (Direct Cost: ¥1,300,000); Fiscal Year 2005: ¥2,900,000 (Direct Cost: ¥2,900,000); Fiscal Year 2004: ¥3,800,000 (Direct Cost: ¥3,800,000)
• Keywords: Antarctica / ice sheet / radar / ice core / remote sensing / Dome Fuji / wave propagation / birefringence

Research Abstract

We analyzed data from deep radar sounding of the Antarctic ice sheet. By analysis of the radar data, we first investigated wave propagation in wide area in Antarctica. Subsequently, we studied effects from crystal orientation fabrics, dynamical condition of the ice sheet, bottom environment and impurity. Outline of the result is as follows.
1.In the first fiscal year, we made numerical experiments using a wave propagation model.
2.We compared the simulated results with the observational data.
3.We assessed internal structure of the Antarctic ice sheet. We put special emphasis on the following points.
(1)I identified and analyzed distribution of the isochrones (constant time horizon).
(2)We investigated three dimensional distribution of the wave scattering mechanisms within the ice sheet.
(3)We identified echo free zone within the Antarctic ice sheet.
4,We made a computer program to archive old data of ice radar. Old data is recorded as video image, which we needed to digitize as numerical data.
Overall, we made better archiving the old data and studied in detail potential of the ice radar data for the ice dynamics study in Antarctica.

Research Products

• [Journal Article] 1-D-ice flow modelling at EPICA Dome C and Dome Fuji, East Antarctica (2007)
  • Author(s): Parrenin, F., Dreyfus, G., Durand, G., Fujita, S., Gagliardini, O., Gillet, F., Jouzel, J., Kawamura, K., Lhomme, N., Masson-Delmotte, V., Ritz, C., Schwander, J., Shoji, H., Uemura, R., Watanabe, O., Yoshida, N.
  • Journal Title: Climate of the Past 3 Pages: 243-259
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] 1-Dice flow modelling at EPICA Dome C and Dome Fuji, East Antarctica (2007)
  • Author(s): Parrenin, F., Dreyfus, G., Durand, G., Fujita, S., Gagliardini, O., Gillet, F., Jouzel, J., Kawamura, K., Lhomme, N., Masson-Delmotte, V., Ritz, C., Schwander, J., Shoji, H., Uemura, R., Watanabe, 0., Yoshida, N.
  • Journal Title: Climate of the Past 3 Pages: 243-259
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Radio-wave depolarization and scattering within ice sheets : a matrix-based model to link radar and ice-core measurements and its application (2006)
  • Author(s): Fujita, S., Maeno, H., Matsuoka, K.
  • Journal Title: Journal of Glaciology 52(178) Pages: 407-424
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Interpreting ancient ice in a shallow ice core from the South Yamato (Antarctica) blue ice area using flow modeling and compositional matching to deep ice cores (2006)
  • Author(s): Moore, J.C., Nishio, F., Fujita, S., Narita, H., Pasteur, E., Grinsted, A., Sinisalo, A., Maeno, N
  • Journal Title: Journal of Geophysical Research D16302
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Interpreting ancient ice in a shallow ice core from the South Yamato (Antarctica) blue ice area using flow modeling and compositional matching to deep ice cores. (2006)
  • Author(s): Moore, J.C., Nishio, F., Fujita, S., Narita, H., Pasteur, E., Grinsted, A., Sinisalo, A., Maeno, N.
  • Journal Title: Journal of Geophysical Research
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Seasonal variations in oxygen isotope ratios of daily collected precipitation and wind drift samples and in the final snow cover at Dome Fuji Station, Antarctica (2005)
  • Author(s): Motoyama, H., Hirasawa, N., Satow, K., Watanabe, O.
  • Journal Title: Journal of Geophysical Research 110(D11106)
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Seasonal variations in oxygen isotope ratios of daily collected precipitation and wind drift samples and in the final snow cover at Dome Fuji Station, Antarctica (2005)
  • Author(s): Motoyama, H., Hirasawa, N.Satow, K., Watanabe, O.
  • Journal Title: Journal of Geophysical Research Vol.110
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Stratigraphy analysis of Dome Fuji Antarctic ice core using an optical scanner (2005)
  • Author(s): Takata, M., Iizuka, Y., Hondoh, T., Fujita, S., Fujii, Y., Shoji, H.
  • Journal Title: Annals of Glaciology 39(印刷中)
• [Journal Article] Ice-flow-induced scattering zone within the Antarctic ice sheet revealed by high-frequency airborne radar (2004)
  • Author(s): Matsuoka, K., Uratsuka, S., Fujita, S., Nishio, F.
  • Journal Title: Journal of Glaciology 50(170) Pages: 382-388
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Stratigraphy analysis of Dome Fuji Antarctic ice core using an optical scanner (2004)
  • Author(s): Takata, M., Iizuka, Y., Hondoh, T., Fujita, S., Fujii, Y., Shoji, H.
  • Journal Title: Annals of Glaciology 39 Pages: 467-472
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] <SO_4>^<2-> minimum in the summer snow layer at Dome Fuji station, Antarctica and its probable mechanism. (2004)
  • Author(s): Iizuka, Y., Fujii, Y., Hirasawa, N., Suzuki, T., Motoyama, H., Furukawa他 T., Hondho, T.
  • Journal Title: Journal of Geophysical Research 109
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Ice-flow-induced scattering zone within the Antarctic ice sheet revealed by high-frequency airborne radar (2004)
  • Author(s): Matsuoka K., Uratsuka S., Fujita S., Nishio F.
  • Journal Title: Journal of Glaciology 50(170) Pages: 382-388
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Stratigraphy analysis of Dome Fuji Antarctic ice core using an optical scanner. (2004)
  • Author(s): Takata, M., Iizuka, Y., Hondoh, T., Fujita, S.Fujii, Y.Shoji, H.
  • Journal Title: Annals of Glaciology 39 Pages: 467-472
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] SO42-minimum in the summer snow layer at Dome Fuji station, Antarctica and its probable mechanism. (2004)
  • Author(s): Iizuka, Y., Fujii, Y., Hirasawa, N., Suzuki, T., Motoyama, H., Furukawa, T., Hondho, T.
  • Journal Title: Journal of Geophysical Research 109(D4)
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] SO42-minimum in the summer snow layer at Dome Fuji station, Antarctica and its probable mechanism. (2004)
  • Author(s): Iizuka, Y., Fujii, Y., Hirasawa, N., Suzuki, T., Motoyama, H., Furukawa他
  • Journal Title: Journal of Geophysical Research 109
• [Journal Article] Ice-flow-induced scattering zone within the Antarctic ice sheet revealed by high-frequency airborne radar
  • Author(s): Matsuoka, K., Uratsuka, S., Fujita.S., Nishio, F.
  • Journal Title: Journal of Glaciology (印刷中)
• [Journal Article] Seasonal variations in oxygen isotope ratios of daily collected precipitation and wind drift samples and in the final snow cover at Dome Fuji Station, Antarctica
  • Author(s): Motoyama, H., Hirasawa, N., Satow, K., Watanabe, O.
  • Journal Title: Journal of Geophysical Research (印刷中)
• [Book] 「雪と氷の事典」中の3つの項目「アイスレーダー観測(16_3)」、「電気的光学的性質(7_2_4)」、「氷床内部構造と基盤地形(9_2_1_2)」を担当執筆 (2005)
  • Author(s): 藤田秀二
  • Total Pages: 720
  • Publisher: 朝倉書店
  • Description: 「研究成果報告書概要(和文)」より