Gravity measurements with a portable absolute gravimeter A10 in Syowa Station and Langhovde,East Antarctica |
| |
| Authors: | Takahito Kazama Hideaki Hayakawa Toshihiro Higashi Shingo Ohsono Shunsuke Iwanami Tomoko Hanyu Harumi Ohta Koichiro Doi Yuichi Aoyama Yoichi Fukuda Jun Nishijima Kazuo Shibuya |
| |
| Institution: | 1. Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan;2. National Institute of Polar Research, Tokyo 190-8518, Japan;3. TerraGrav LLC, Kyoto 612-8017, Japan;4. GNSS Technologies Inc., Tokyo 160-0022, Japan;5. Tomakomai National College of Technology, Hokkaido 059-1275, Japan;6. Global Ocean Development Inc., Kanagawa 233-0002, Japan;7. Graduate School of Engineering, Kyushu University, Fukuoka 819-0395, Japan |
| |
| Abstract: | 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. |
| |
| Keywords: | Absolute gravity Antarctica A10 gravimeter Ice mass balance Glacial isostatic adjustment |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
