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Studies on global gravity changes by means of absolute gravity measurements at the GGP-JAPAN superconducting gravity stations.

通过GGP-JAPAN超导重力站的绝对重力测量研究全球重力变化。

基本信息

批准号：
14340132
负责人：
FUKUDA Yoichi
金额：
$ 10.62万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14340132/
关键词：
Absolute Gravimeter Superconducting Gravimeter GGP Gravity Changes Satellite Gravimetry Gravity Base Station

项目摘要

The goal of this study is to determine calibration factors of superconducting gravimeters of the GGP(Global Geodynamic project)-Japan stations, and to obtain precise gravity data sets, which can be used for the comparison with the satellite gravity data such as GRACE, by means of absolute gravity measurements.For this purpose, we conducted absolute gravity measurements by our own hand at the GGP-Japan sites of Bandung (Indonesia) in 2002, Syowa Station (Antarctica) in 2003 and Canberra (Australia) in 2004, in addition to the GGP-Japan domestic sites of Kyoto, Esashi and Matsushiro. Absolute gravity measurements at Ny-Alesund, the other GGP-Japan site in Arctic area, were also conducted in cooperation with European researchers. Moreover, we conducted additional absolute measurements in Yogyakarta and Tibinon (Indonesia), and in Perth (Australia) for future references of secular gravity changes.As the results of this study, besides the originally intended outcome, namely the determination of the calibration factors of the superconducting gravimeters at the GGP-Japan sites, we established several absolute gravity stations for detecting future gravity changes. Especially the absolute gravity measurement conducted by this research was the first one in the history of Indonesia, and it also played a big role to enhance the gravity reference network in Indonesia.On the other hand, from the viewpoint of the secular gravity changes, we detected the gravity change expected from the postglacial rebound in Syowa Station, and we also succeeded in detecting the gravity change associated with present day ice melting in Ny-Alesund.

本研究的目的是确定GGP -日本站超导重力仪的定标因子，并通过绝对重力测量获得精确的重力数据集，用于与GRACE等卫星重力数据进行比较。为此，我们在2002年位于印度尼西亚万隆的GGP-Japan站点、2003年位于南极洲的Syowa站点和2004年位于澳大利亚堪培拉站点，以及在京都、Esashi和松城的GGP-Japan国内站点，亲自进行了绝对重力测量。在北极地区的另一个GGP-Japan站点新奥勒松，也与欧洲研究人员合作进行了绝对重力测量。此外，我们在日惹和Tibinon（印度尼西亚）以及珀斯（澳大利亚）进行了额外的绝对测量，以供将来参考长期重力变化。根据本研究的结果，除了确定GGP-Japan站点超导重力仪的校准因子外，我们还建立了几个绝对重力站，用于探测未来的重力变化。特别是本研究进行的绝对重力测量，是印度尼西亚历史上首次进行绝对重力测量，对加强印度尼西亚的重力参考网也起到了很大的作用。另一方面，从长期重力变化的角度，我们探测到了Syowa站冰后反弹所预期的重力变化，并成功探测到了新奥勒松现今冰融化相关的重力变化。