| 日本东北大地震引起的洋底地壳和海水质量重分布效应分析 |
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| 引用本文： | 龚正,许才军.日本东北大地震引起的洋底地壳和海水质量重分布效应分析[J].大地测量与地球动力学,2016,36(5):377. |
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| 作者姓名： | 龚正 许才军 |
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| 摘 要： | 采用两种方式得到2011年日本东北大地震引起的洋底垂直形变数据，通过傅里叶变换和傅里叶逆变换计算得到洋底地壳垂直运动产生的洋底地壳与海水物质交换导致的重力效应。分析这两种方式得到的重力变化并与利用GRACE提取的重力变化对比，结果发现此效应显著，在提取同震重力变化时不可忽略。
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| 关 键 词： | 日本东北大地震 重力变化 质量重分布 傅里叶变换 卫星重力 |
The Gravity Effect Due to the Redistribution of Ocean Floor Mass Caused by 2011 Tohoku-Oki Earthquake |
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| GONG Zheng,XU Caijun.The Gravity Effect Due to the Redistribution of Ocean Floor Mass Caused by 2011 Tohoku-Oki Earthquake[J].Journal of Geodesy and Geodynamics,2016,36(5):377. |
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| Authors: | GONG Zheng XU Caijun |
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| Abstract: | We use two methodsto get the ocean floor deformation data caused by the 2011 Tohoku-Oki earthquake. Then the gravity effects due to the redistribution of ocean floor mass can be calculated through Fourier transformation and Fourier inverse transformation. These gravity effects are analyzed and compared to the gravity data observed by GRACE satellite. The results show that these gravity effects are notable, and should be of concern during extracting coseismic gravity changes. |
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| Keywords: | Tohoku-Oki earthquake gravity change mass redistribution Fourier transformation satellite gravity |
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