Gravity measurements with a portable absolute gravimeter A10 in Syowa Station and Langhovde, East Antarctica
スポンサーリンク
概要
- 論文の詳細を見る
Absolute gravity values were measured with a portable absolute gravimeter A10 in East Antarctica, for the first time by the Japanese Antarctic Research Expedition. This study aims to investigate regional spatiotemporal variations of ice mass distributions and associated crustal deformations around Syowa Station by means of repeated absolute gravity measurements, and we obtained the first absolute gravity value in Southern Langhovde on the Antarctic Continent. The average absolute gravity value at the newly installed benchmark AGS01 in Langhovde (obtained on 3 February 2012) was 982535584.2 ± 0.7 μgal (1 [μgal] = 1 × 10−8 [m/s2]), which was in agreement with the gravity values obtained by the past relative gravity measurements within 1 mgal. In addition, the average absolute gravity value obtained at AGSaux in Syowa Station was consistent with both previous absolute gravity values and those obtained by simultaneous measurements using an FG5 gravimeter, owing to adequate data corrections associated with tidal effects and time variations in atomic clock frequencies. In order to detect the gravity changes associated with the ice mass changes and other tectonic phenomena, we plan to conduct absolute gravity measurements at AGS01 again and at other campaign sites around Syowa Station as well in the near future, with careful attention paid to the impacts of severe environmental conditions in Antarctica on gravity data collection.
- 2013-09-12
著者
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Shibuya Kazuo
National Inst. Of Polar Res. And Graduate Univ. For Advanced Studies (sokendai) 1-9-10 Kaga Itabashi
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Doi Koichiro
National Institute Of Polar Research
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Aoyama Yuichi
National Institute Of Polar Research
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Nishijima Jun
Graduate School Of Science And Engineering Waseda University
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Hayakawa Hideaki
National Institute Of Polar Research 10-3 Midori-cho Tachikawa Tokyo Japan
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Fukuda Yoichi
Graduate School Of Science Kyoto University
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Kazama Takahito
Graduate School Of Science Kyoto University
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IWANAMI Shunsuke
Tomakomai National College of Technology, 443, Nishikioka,Tomakomai,Hokkaido,059-1275.
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Hanyu Tomoko
National Institute of Polar Research, Tokyo 190-8518, Japan
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Higashi Toshihiro
TerraGrav LLC, Kyoto 612-8017, Japan
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Ohsono Shingo
GNSS Technologies Inc., Tokyo 160-0022, Japan
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Ohta Harumi
Global Ocean Development Inc., Kanagawa 233-0002, Japan
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Fukuda Yoichi
Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
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Shibuya Kazuo
National Institute of Polar Research, Tokyo 190-8518, Japan
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Nishijima Jun
Graduate School of Engineering, Kyushu University, Fukuoka 819-0395, Japan
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Doi Koichiro
National Institute of Polar Research, Tokyo 190-8518, Japan
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Iwanami Shunsuke
Tomakomai National College of Technology, Hokkaido 059-1275, Japan
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