PRELIMINARY STUDY OF THE G6,ANTARCTIC ICE CORE

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概要

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• A 100m-long ice core was extracted at Site G6,Antarctica (73.1°S, 39.8°E) by members of JARE-27 in 1986. The excellent quality of the core obtained by electro-mechanical drill makes it possible to examine the environmental condition of snow deposition by conducting combined physical and chemical core analyses. Preliminary studies were carried out on visual stratigraphy, bulk density and electric DC conductivity on the core surface. The results obtained show that the average interval of ice layer/crust and DC conductivity cycle are 11 and 10cm of ice respectively. Bulk density data were treated so as to have the best-fit of the firnification equation (M. M. HERRON and C. C. LANGWAY, JR. : J. Glaciol., 25,373,1980) with data points under measured surface density of 0.38g/(cm)^3 and mean annual temperature of -40℃, which resulted in the accumulation rate of 10cm of ice/a. These values are significantly higher than the accumulation rate of 6 to 7cm of ice/a measured by stakes in the field (F. NISHIO et al. : JARE Data Rep., 137,49,1988). Further studies by chemical analysis and stable isotope measurement on the same core are going to be made for investigation of the core chronology which reflects the depositional feature of snow at the surface of the ice sheet.

• 国立極地研究所の論文

著者

• Fujii Yoshiyuki

  National Institute of Polar Research, Research Organization of Information and Systems

• Shoji Hitoshi

  Faculty Of Science Toyama University

• Fujii Yoshiyuki

  National Institute Of Polar Research

関連論文

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• CHEMICAL COMPOSITIONS OF SEA SALT PARTICLES AND PARTICULATE SULFUR COMPONENTS AT SYOWA STATION, ANTARCTICA
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• 2. Net Accumulation of Snow by the Stake Method(Glaciological Data Collected by the 35th Japanese Antarctic Research Expedition during 1994-1995)
• 1. Outline of Field Observations during 1994-1995(Glaciological Data Collected by the 35th Japanese Antarctic Research Expedition during 1994-1995)
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• Glaciological Research at Mizuho Station, Antarctica in 1977
• Glaciological research in Hidden Valley, Mukut Himal in 1994
• VOLCANIC RECORDS AND DATING OF THE UPPER HALF OF THE H15 ICE CORE FROM MIZUHO PLATEAU, EAST ANTARCTICA
• Cosmic spherules in bare ice near the Allan Hills, Victoria Land, Antarctica (extended abstract)
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• METEOROLOGICAL DATA AT MIZUHO STATION, ANTARCTICA IN 1984
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• AIR EXTRACTION SYSTEMS FOR ICE CORE AND CO_2 AND CH_4 CONCENTRATIONS IN THE PAST ATMOSPHERE
• Ice core processing at Dome F, Antarctica
• Preface
• Glaciological Data Collected by the 30th, 31st and 32nd Japanese Antarctic Research Expeditions in 1989-1991
• 5. Surface Meteorological Data during Oversnow Traverses(Glaciological Data Collected by the 37th Japanese Antarctic Research Expedition during 1996-1997)
• 4. Snow Temperature Data at Dome Fuji Station(Glaciological Data Collected by the 37th Japanese Antarctic Research Expedition during 1996-1997)
• 3. Surface Snow Density around Dome Fuji Station(Glaciological Data Collected by the 37th Japanese Antarctic Research Expedition during 1996-1997)
• 2. Net Accumulation of Snow at Dome Fuji Station(Glaciological Data Collected by the 37th Japanese Antarctic Research Expedition during 1996-1997)
• 1. Outline of Field Observations during 1996-1997(Glaciological Data Collected by the 37th Japanese Antarctic Research Expedition during 1996-1997)
• Geomorphological and glaciological aspects around the highest dome in Queen Maud Land, East Antarctica
• Neutron activation analysis of spherules from bare ice near the Allan Hills and an ice core from Mizuho Station (abstract)
• Instrumental neutron activation analyses of the spherules from the Mizuho ice core (abstract)
• Semiannual Variation of Microparticle Concentration in Snow Drift at Mizuho Station, Antarctica in 1977
• Seasonal variation of pH values in snow at Halley Base and Mizuho Station, Antarctica (abstract)
• Seasonal variation of oxygen isotopic composition of drifting snow at Mizuho Station, East Antarctica (abstract)
• Past 30-year pH record in a firm core from the Brust Ice Shelf, Antarctica, and its relationship to volcanic events
• Formation of Surface Snow Layer at Mizuho Station, Antarctica
• Comparison of the Seasonal Meteorological Variations between Mizuho and Syowa Stations, Antarctica in 1977
• Determination of Methane Concentration in Air Extracted from Antarctic Ice Core Samples.
• Observation of Snow Particles at Hidden Valley, Mukut Himal:Glaciological Expedition of Nepal, Contribution No. 50
• Preliminary Investigations of Sediment Core Samples from the Tsola-Tso Lake, Khumbu Himal:Glaciological Expedition of Nepal, Contribution No. 77

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