Ice core drilling at Ushkovsky ice cap, Kamchatka, Russia.

• SHIRAIWA Takayuki

  Institute of Low Temperature Science, Hokkaido University

• NISHIO Fumihiko

  Hokkaido University of Education, Kushiro Campus

• KAMEDA Takao

  Kitami Institute of Technology

• TAKAHASHI Akiyoshi

  Geo Tecs Co. Ltd.

• TOYAMA Yoko

  Hokkaido University of Education, Kushiro Campus

• MURAVYEV Yaroslav D.

  Institute of Volcanology, Russian Academy of Sciences

• OVSYANNIKOV Alexander A.

  Institute of Volcanology, Russian Academy of Sciences

Bibliographic Information

Other Title

• カムチャツカ半島ウシュコフスキー氷冠における雪氷コア掘削
• カムチャツカ ハントウ ウシュコフスキーヒョウカン ニ オケル セッピョウ コア クッサク

Abstract

Ice-core drilling and in situ ice-core analyses were carried out at Ushkovsky ice cap, Kamchatka, Russia. After transporting approximately 2.4 tons of a drilling system and camping equipments to the summit of the ice cap, ice-coring was operated at Site K2 (3, 901 m a.s.l.; ice thickness 240 m) from June 20 to 30, 1998. During 307 drilling runs in 103 hours, ice cores of 211.7 m in total length were recovered and the temperature of borehole-wall was measured down to 211.7 m. Temperatures at 10 m depth and the bottom of the borehole were -15.7°C and -4.2°C, respectively, showing a linear temperature increase with the depth. Ice cores were subjected to stratigraphic observation, bulk density measurements, electrical conductivity measurements (ECM) and imaging the whole length of ice cores with a digital video camera. In-situ ice core analyses of upper 141 m revealed that shallow cores above the pore close-off depth at about 55 m were composed of melt-frozen ice and dry firn, and of melt-frozen ice and compacted ice below that depth. There were 183 volcanic ash layers in the ice cores down to 141 m, and two ash layers were dated as specific erupted ashes by their facies. ECM signals were high at ice layers and reduced at volcanic ash layers. In addition to the glaciological work, the influence of high altitude on the physical conditions of members was studied.

Journal

• Journal of the Japanese Society of Snow and Ice

  Journal of the Japanese Society of Snow and Ice 61 (1), 25-40, 1999

  The Japanese Society of Snow and Ice

Keywords

• paleoclimate
• ice core drilling
• glacier
• volcanic ash
• Kamchatka

Details

• CRID: 1390282681438480896
• NII Article ID: 10002384262
• NII Article ID: 10009482896
• NII Book ID: AN00131221
• DOI: 10.5331/seppyo.61.25
• ISSN: 18836267
• ISSN: 03731006
• NDL BIB ID: 4638616
• Web Site: https://kitami-it.repo.nii.ac.jp/records/7180
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4638616
• Text Lang: ja
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed