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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超导重力仪的刻度因子（全球地球动力学项目）-日本台站，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。我们在位于万隆的GGP-日本站点亲自进行了绝对重力测量除了全球地球观测计划-日本国内的京都、江ashi和松代站点外，还分别于2002年、2003年和2004年在印度尼西亚的昭和站（南极洲）和堪培拉（澳大利亚）进行了考察。还与欧洲研究人员合作，在北极地区的另一个GGP-日本站点-Ny-Alesund进行了绝对重力测量。此外，我们在日惹和Tibinon（印度尼西亚），并在珀斯（澳大利亚）进行了额外的绝对测量，为未来的长期重力变化的参考。作为这项研究的结果，除了最初的预期结果，即在GGP-日本网站的超导重力仪的校准因子的确定，我们建立了几个绝对重力站，用于检测未来的重力变化。特别是本次研究进行的绝对重力测量在印尼历史上尚属首次，对印尼重力基准网的完善也起到了很大的作用;另一方面，从长期重力变化的角度，我们探测到了雪瓦站冰后期反弹所预期的重力变化，我们还成功地探测到了与新奥勒松现今冰层融化有关的重力变化。