极地研究

极地研究

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Field measurements of absolute gravity in East Antarctica

Koichiro Doi1,2*, Hideaki Hayakawa3, Takahito Kazama4, Toshihiro Higashi5, Shingo Osono6, Yoichi Fukuda4, Jun Nishijima7, Yuichi Aoyama1,2 & Junichi Ueda8   

  1.  
    1 National Institute of Polar Research, Tokyo 190-8518, Japan;
    2 The Graduate University for Advanced Studies (SOKENDAI), Tokyo 190-8518, Japan;
    3 Aso Volcanological Laboratory, Kyoto University, Kumamoto 869-1404. Japan;
    4 Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan;
    5 TerraGrav LLC., Kyoto 612-8017, Japan;
    6 GNSS Technologies Inc., Tokyo 160-0022, Japan;
    7 Graduate School of Engineering, Kyushu University, Fukuoka 819-0395, Japan;
    8 Japan Association of Surveyors, Osaka 545-0051, Japan
  • 出版日期:1963-12-30 发布日期:1963-12-30

Field measurements of absolute gravity in East Antarctica

Koichiro Doi1,2*, Hideaki Hayakawa3, Takahito Kazama4, Toshihiro Higashi5, Shingo Osono6, Yoichi Fukuda4, Jun Nishijima7, Yuichi Aoyama1,2 & Junichi Ueda8   

  1.  
    1 National Institute of Polar Research, Tokyo 190-8518, Japan;
    2 The Graduate University for Advanced Studies (SOKENDAI), Tokyo 190-8518, Japan;
    3 Aso Volcanological Laboratory, Kyoto University, Kumamoto 869-1404. Japan;
    4 Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan;
    5 TerraGrav LLC., Kyoto 612-8017, Japan;
    6 GNSS Technologies Inc., Tokyo 160-0022, Japan;
    7 Graduate School of Engineering, Kyushu University, Fukuoka 819-0395, Japan;
    8 Japan Association of Surveyors, Osaka 545-0051, Japan
  • Online:1963-12-30 Published:1963-12-30

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摘要： This paper reports the results of field-based absolute gravity measurements aimed at detecting gravity change and crustal displacement caused by glacial isostatic adjustment. The project was initiated within the framework of the 53rd Japanese Antarctic Research Expedition (JARE53). Absolute gravity measurements, together with GPS measurements, were planned at several outcrops along the Prince Olav Coast and Sôya Coast of East Antarctica, including at Syowa Station. Since the icebreaker Shirase (AGB 5003) was unable to moor alongside Syowa Station, operations were somewhat restricted during JARE53. However, despite this setback, we were able to complete measurements at two sites: Syowa Station and Langhovde. The absolute gravity value at the Syowa Station IAGBN (A) site, observed using an FG-5 absolute gravimeter (serial number 210; FG-5 #210), was  982 524 322.7±0.1 µGal, and the gravity change rate at the beginning of 2012 was –0.26 µGal?a-1. An absolute gravity value of 982 535 584.2±0.7 µGal was obtained using a portable A-10 absolute gravimeter (serial number 017; A-10 #017) at the newly located site AGS01 in Langhovde.

关键词: absolute gravity, field measurement, Antarctica, A-10 and FG-5 absolute gravimeters, GPS, JARE

Abstract: This paper reports the results of field-based absolute gravity measurements aimed at detecting gravity change and crustal displacement caused by glacial isostatic adjustment. The project was initiated within the framework of the 53rd Japanese Antarctic Research Expedition (JARE53). Absolute gravity measurements, together with GPS measurements, were planned at several outcrops along the Prince Olav Coast and Sôya Coast of East Antarctica, including at Syowa Station. Since the icebreaker Shirase (AGB 5003) was unable to moor alongside Syowa Station, operations were somewhat restricted during JARE53. However, despite this setback, we were able to complete measurements at two sites: Syowa Station and Langhovde. The absolute gravity value at the Syowa Station IAGBN (A) site, observed using an FG-5 absolute gravimeter (serial number 210; FG-5 #210), was  982 524 322.7±0.1 µGal, and the gravity change rate at the beginning of 2012 was –0.26 µGal?a-1. An absolute gravity value of 982 535 584.2±0.7 µGal was obtained using a portable A-10 absolute gravimeter (serial number 017; A-10 #017) at the newly located site AGS01 in Langhovde.

Key words: absolute gravity, field measurement, Antarctica, A-10 and FG-5 absolute gravimeters, GPS, JARE