2002 Fiscal Year Annual Research Report

極地氷床における物理過程の解明とそれに基づく気候・環境変動史の高分解能解析

Research Project

Project/Area Number	14GS0202
Research Institution	Hokkaido University
Principal Investigator	本堂武夫北海道大学, 低温科学研究所, 教授 (60109494)
Co-Investigator(Kenkyū-buntansha)	白岩孝行北海道大学, 低温科学研究所, 助手 (90235739) 堀彰北海道大学, 低温科学研究所, 助手 (60280856) 成田英器北海道大学, 低温科学研究所, 助教授 (20001662) 藤田秀二国立極地研究所, 助教授 (30250476)
Keywords	氷床 / アイスコア / 気候変動 / 地球環境変動 / 氷床流動 / 結晶組織
Research Abstract	本研究は、氷床における様々な物理過程の解明を行うと共に、各地で採取されたアイスコアの高分解能解析を実施し、種々のシグナルの意味と信頼性を明らかにして、気候変動期に特有な地球環境変動の詳細を明らかにすることを目的とする。本年度の研究実績は、以下の通りである。 (1)アイスコアの微細構造の解析:不純物等の分布と結晶組織の関係を明らかにするために、走査電子顕微鏡と顕微ラマン散乱測定装置を複合したSEM-RAMAN装置を導入し、氷に含まれる微粒子の分布および結晶組織の解析を進めている。今後、次項以下の課題と連携して解析を進める。 (2)アイスコアの高分解能解析とシグナルの形成過程:ドームFuji、ペニー氷帽およびローガン山で掘削されたアイスコアを用いて、(1)X線透過率プロファイル(浅層部)、(2)目視層位観察、(3)光散乱ラインスキャン、(4)気泡・ハイドレート数密度プロファイル、(5)電気伝導度プロファイル、などの連続解析と並行して、(6)主要イオン濃度の高分解能測定、(7)X線極点測定および(8)マイクロ波誘電率プロファイル測定を行い、これまでにない細かい変動の解析が可能になりつつある。 (3)氷床の流動解析とコア年代の推定:上記高分解能解析で、結晶組織の互層構造が明らかになりつつあり、今後これを考慮した流動解析法の開発を進める。また、気泡・ハイドレート数密度の変動から各深度における年層厚の推定が可能になった。

Research Products

(18 results)

All Other

All Publications (18 results)

[Publications] Fuiji, Y.: "Deep ice core drilling to 2503m depth at Dome Fuji, Antarctica"Memoirs of National Institute of Polar Research, Special Issue. 56. 103-116 (2002)
[Publications] Fujita, S.: "Ice core processing at Dome Fuji Station, Antarctica"Memoirs of National Institute of Polar Research, Special Issue. 56. 275-286 (2002)
[Publications] Fujita, S.: "Electrical measurements on the 2503m Dome F Antarctic ice core"Annals of glaciology. 35. 313-320 (2002)
[Publications] Fujita, S.: "Linear and non-linear relations between high-freguency-limit conductivity, AC-ECM signals and ECM signals of Dome F Antarctic ice core from a labolatory experiment"Annals of glaciology. 35. 321-328 (2002)
[Publications] Fujita, S.: "Scattering of VHF radio waves from within the top 700m of the Antarctic ice sheet and its relation to the depositional environment : a case study along the Syowa-Mizuho-Dome F traverse"Annals of glaciology. 34. 157-164 (2002)
[Publications] Hondoh, T.: "Depth-age and temperature prediction at Dome Fuji Station, East Antarctica"Annals of glaciology. 35. 384-390 (2002)
[Publications] Iizuka, Y.: "Formation processes of a pocket consisting of bubble-free ice in Hamna ice cliff, Soya Coast, East Antarctica"Polar meteorology and glaciology. 16. 53-60 (2002)
[Publications] Iizuka, Y.: "Crystal fabrics of basal ice near Hamna Icefall, East Antarctica"Bulletin of Glaciological Research. 19. 59-62 (2002)
[Publications] Ikeda-Fukazawa: "Molecular dynamics studies of molecular diffusion in ice Ih"Journal of Chemical Physics. 117・8. 3886-3896 (2002)
[Publications] Kohshima, S.: "Ice core drilling on Southern Patagonia Icefield -Development of a new portable drill and the field expedition in 1999-"Memoirs of National Institute of Polar Research, Special Issue. 56. 49-58 (2002)
[Publications] Matsuoka, K.: "A ground-based, multi-frequecy ice-penetrating radar system"Annals of glaciology. 34. 171-176 (2002)
[Publications] Shiraiwa, T.: "Mountain Environment in Kamchatka : Physical Backgrounds and Recent Changes in tha climate and Glaciers"Global Environmental Research. 6・1. 19-30 (2002)
[Publications] Takahashi, A.: "Improvements to the JARE deep ice core drill"Memoirs of National Institute of Polar Research, Special Issue. 56. 117-125 (2002)
[Publications] Takata, M.: "Stratigraphical structure analysis of the NGRIP shallow ice core using laser tomograph technique"Bulletin of Glaciological Research. 19. 19-24 (2002)
[Publications] Takata, M.: "Application of laser induced breakdown spectroscopy for determination of sodium in ice"Bulletin of Glaciological Research. 19. 107-112 (2002)
[Publications] 本堂武夫: "氷床コアの物理解析研究の現状と課題"雪氷. 64・4. 351-363 (2002)
[Publications] 白岩孝行: "カムチャツカ半島の近年の氷河質量収支変動と気候変動"地学雑誌. 111・4. 476-485 (2002)
[Publications] Fujita, S.: "Scattering of VHF radio waves from within an ice sheet containing the vertical-girdle-type ice fabric and anisotropic reflection boundaries"Annals of glaciology. 37(in press). (2003)

2002 Fiscal Year Annual Research Report

極地氷床における物理過程の解明とそれに基づく気候・環境変動史の高分解能解析

Principal Investigator

本堂 武夫 北海道大学, 低温科学研究所, 教授 (60109494)

Research Products

[Publications] Fuiji, Y.: "Deep ice core drilling to 2503m depth at Dome Fuji, Antarctica"Memoirs of National Institute of Polar Research, Special Issue. 56. 103-116 (2002)

[Publications] Fujita, S.: "Ice core processing at Dome Fuji Station, Antarctica"Memoirs of National Institute of Polar Research, Special Issue. 56. 275-286 (2002)

[Publications] Fujita, S.: "Electrical measurements on the 2503m Dome F Antarctic ice core"Annals of glaciology. 35. 313-320 (2002)

[Publications] Fujita, S.: "Linear and non-linear relations between high-freguency-limit conductivity, AC-ECM signals and ECM signals of Dome F Antarctic ice core from a labolatory experiment"Annals of glaciology. 35. 321-328 (2002)

[Publications] Fujita, S.: "Scattering of VHF radio waves from within the top 700m of the Antarctic ice sheet and its relation to the depositional environment : a case study along the Syowa-Mizuho-Dome F traverse"Annals of glaciology. 34. 157-164 (2002)

[Publications] Hondoh, T.: "Depth-age and temperature prediction at Dome Fuji Station, East Antarctica"Annals of glaciology. 35. 384-390 (2002)

[Publications] Iizuka, Y.: "Formation processes of a pocket consisting of bubble-free ice in Hamna ice cliff, Soya Coast, East Antarctica"Polar meteorology and glaciology. 16. 53-60 (2002)

[Publications] Iizuka, Y.: "Crystal fabrics of basal ice near Hamna Icefall, East Antarctica"Bulletin of Glaciological Research. 19. 59-62 (2002)

[Publications] Ikeda-Fukazawa: "Molecular dynamics studies of molecular diffusion in ice Ih"Journal of Chemical Physics. 117・8. 3886-3896 (2002)

[Publications] Kohshima, S.: "Ice core drilling on Southern Patagonia Icefield -Development of a new portable drill and the field expedition in 1999-"Memoirs of National Institute of Polar Research, Special Issue. 56. 49-58 (2002)

[Publications] Matsuoka, K.: "A ground-based, multi-frequecy ice-penetrating radar system"Annals of glaciology. 34. 171-176 (2002)

[Publications] Shiraiwa, T.: "Mountain Environment in Kamchatka : Physical Backgrounds and Recent Changes in tha climate and Glaciers"Global Environmental Research. 6・1. 19-30 (2002)

[Publications] Takahashi, A.: "Improvements to the JARE deep ice core drill"Memoirs of National Institute of Polar Research, Special Issue. 56. 117-125 (2002)

[Publications] Takata, M.: "Stratigraphical structure analysis of the NGRIP shallow ice core using laser tomograph technique"Bulletin of Glaciological Research. 19. 19-24 (2002)

[Publications] Takata, M.: "Application of laser induced breakdown spectroscopy for determination of sodium in ice"Bulletin of Glaciological Research. 19. 107-112 (2002)

[Publications] 本堂武夫: "氷床コアの物理解析研究の現状と課題"雪氷. 64・4. 351-363 (2002)

[Publications] 白岩孝行: "カムチャツカ半島の近年の氷河質量収支変動と気候変動"地学雑誌. 111・4. 476-485 (2002)

[Publications] Fujita, S.: "Scattering of VHF radio waves from within an ice sheet containing the vertical-girdle-type ice fabric and anisotropic reflection boundaries"Annals of glaciology. 37(in press). (2003)

本堂武夫北海道大学, 低温科学研究所, 教授 (60109494)