Japan Geoscience Union Meeting 2022

Presentation information

[J] Poster

S (Solid Earth Sciences ) » S-GD Geodesy

[S-GD02] Geodesy and Global Geodetic Observing System

Wed. Jun 1, 2022 11:00 AM - 1:00 PM Online Poster Zoom Room (20) (Ch.20)

convener:Yusuke Yokota(Institute of Industrial Science, The University of Tokyo), convener:Yuta Mitsui(Department of Geosciences, Shizuoka University), Koji Matsuo(Geospatial Information Authority of Japan), Chairperson:Yusuke Yokota(Institute of Industrial Science, The University of Tokyo), Koji Matsuo(Geospatial Information Authority of Japan), Yuta Mitsui(Department of Geosciences, Shizuoka University)

11:00 AM - 1:00 PM

[SGD02-P03] Absolute gravity measurements conducted in the 63rd Japanese Antarctic Research Expedition

Akito Araya2, Daisuke Oka3, Yoichi Fukuda1, Yuichi Aoyama1, Akihisa Hattori4, Jun Nishijima5, Jun'ichi Okuno1, *Koichiro Doi1 (1.National Institute of Polar Research, 2.Earthquake Research Institute, University of Tokyo, 3.Hokkaido Research Organization, 4.The Graduate University for Advanced Studies, SOKENDAI, 5.Faculty of Engineering, Kyushu University)

Keywords:Absolute gravity measurement, Antarctic research, Measurement in the field

The absolute gravity measurements were carried out at Syowa Station and its surrounding outcrop rock areas during summer season in the 63rd Japanese Antarctic Research Expedition (JARE63) (December 2021 - January 2022) to establish the absolute gravity reference network in Antarctica and to detect the crustal movement caused by the ice sheet change. This is the first time to conduct the absolute gravity measurement in the field since summer season in the JARE59 (December 2017 - January 2018).
We used four absolute gravimeters, FG-5#201, A10#017, TAG-1, and TAG-2 for the measurements. Among them, A10 and TAG were also used in the field. In addition, two absolute gravimeters, FG-5 and AQG, were also brought in by the Geospatial Information Authority of Japan (GSI) for measurement.
At Syowa Station, the measurements by each gravimeter were carried out on the basement of the International Absolute Gravity Basement Network (IAGBN) in the Gravity Observation Hut (GOH), and the results were obtained for intercomparison. In addition, measurements by the A10 and TAG were carried out at the benchmark near the GOH. In the coastal outcrop areas, measurements were carried out at Langhovde, Skarvsnes, and Rundvågshetta. In preparation for future measurements, a survey of the surrounding environment and vibrations was carried out at S16 on the ice sheet.
In this presentation, we will show the details of the measurements and some preliminary results.