Geomorphological and glaciological aspects around the highest dome in Queen Maud Land, East Antarctica
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概要
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The oversnow traverse party of the Japanese Antarctic Research Expedition in 1985 found the location of the top of the second highest dome in the Antarctic Ice Sheet at 77°22'S, 39°37'E with an elevation of 3807 m, and surveyed the dome. A ridge of the ice divide runs from the dome top in a west-northwest direction, and a narrow subsurface basin lower than 500 m above the sea-level extends in a scale of 100 km long below the dome top in a similar direction to that of the surface ridge. In view of the larger scale of 100 km order on the subsurface topography, this dome is classified into "the subglacial basin type" in contrast with "the subglacial mountain type" such as Dome A, the highest dome in the Antarctic Ice Sheet. Comparative study between such types is important for discussions on the formation, development and variation of the ice sheet in the geological time scale, as well as their dynamics. From climatological and glaciological observations around the dome, the directions of prevailing winds and the lapse rates of snow temperature at 10 m depth (annual mean air temperature) are described, and the effect of the surface slope on such surface environments is discussed briefly. Annual mean air temperature at the dome top is estimated to be -58.0℃. By the use of mean annual net accumulation of 3.2 cm in water equivalent which was abtained from the 5 m-pit profile of tritium content near the dome top, age of the dome ice with depth is simply estimated.
- 国立極地研究所の論文
著者
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Fujii Yoshiyuki
National Institute of Polar Research, Research Organization of Information and Systems
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Ageta Yutaka
Water Research Laboratory Nagoya University
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Ageta Yutaka
Water Research Institute Nagoya University
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Fujii Yoshiyuki
National Institute Of Polar Research
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Okuhira Fumio
Gifu Prefectural Institute for Environmental Pollution
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Okuhira Fumio
Gifu Prefectural Research Institute For Environmental Pollution
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Kaminuma Kokichi
Geophysical Research Station, Kyoto University
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Kaminuma Kokichi
Geophysical Research Station Kyoto University
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- Preface
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- 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)
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- VII. Net Accumulation of Snow with a 100-stake Row(GLACIOLOGICAL RESEARCH PROGRAM IN EAST QUEEN MAUD LAND, EAST ANTARCTICA PART 6 ADVANCE CAMP, 1985)
- V. Wind Velocity of the Upper Atmosphere(GLACIOLOGICAL RESEARCH PROGRAM IN EAST QUEEN MAUD LAND, EAST ANTARCTICA PART 6 ADVANCE CAMP, 1985)
- I. Introduction(GLACIOLOGICAL RESEARCH PROGRAM IN EAST QUEEN MAUD LAND, EAST ANTARCTICA PART 6 ADVANCE CAMP, 1985)
- Glaciological research program in East Queen Maud Land, East Antarctica, Part 6, Advance Camp, 1985(Glaciology 15)
- II. Surface Meteorological Data during the Stay at AC(GLACIOLOGICAL RESEARCH PROGRAM IN EAST QUEEN MAUD LAND, EAST ANTARCTICA PART 6 ADVANCE CAMP, 1985)
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