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Vertical displacement loading tides and self-attraction and loading tides in the Bohai, Yellow, and East China Seas

Science China Earth Sciences 2013年第2期56卷 63-70页

作者： FANG GuoHong XU XiaoQing WEI ZeXun WANG YongGang WANG XinYi Key Laboratory of Marine Sciences and Numerical Modeling First Institute of Oceanography State Oceanic Administration

The loading tides are calculated by means of the Green's function method based on a high-resolution regional ocean tide model, the TOPO7.0 global ocean tide model, and the Gutenberg-Bullen A Earth model. The results show that the maximal amplitude of M2 vertical displacement loading (VDL) tide in the Bohai, Yellow, and East China Seas exceeding 28mm appears 150km off the Zhejiang coast; the second maximum exceeding 20mm appears in Inchon Bay; and the third maximum exceeding 14mm is located in the northeast of the North Yellow Sea. The maximal amplitudes of S2 VDL tide at the above three locations exceed 10, 8, and 4mm, respectively. The maximal amplitudes of the K1 and O1 VDL tides, exceeding 13 and 10 mm respectively, appear near the central and north Ryukyu Islands; the amplitudes tend to decease toward the inward areas. The phases of semidiurnal VDL tides are basically opposite to those of corresponding ocean tides. The phases of diurnal VDL tides are basically opposite to those of corresponding ocean tides in the most part of the East China Sea and the eastern part of the South Yellow Sea. This anti-phase relationship generally does not hold in the rest parts of the Bohai and Yellow Seas. The distribution patterns of self-attraction and loading (SAL) tides are very similar to those of VDL tides. The SAL tides have amplitudes about 1.2-1.7 times of the corresponding VDL tides and their phases are basically opposite to the corresponding VDL tides. The maximal amplitude of M2 SAL tide also appears off the Zhejiang coast, with a magnitude exceeding 42mm.

关键词： Bohai Sea Yellow Sea East China Sea ocean tides loading tides self-attraction and loading tides

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Geoid Deformation and Elevation Influence Caused by Building loading

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Geo-Spatial Information Science 2009年第2期12卷 154-156页

作者：王解先季善标曹月玲余美义 Department of Surveying and Geo-informatics Tongji University

The paper studies the ground vertical deformation and the geoid undulation caused by loading of neighboring buildings, based on the loading tides theory. The influence on elevation is also considered. The results show that the ground vertical deformation and the geoid undulation both reach millimeter magnitude. Therefore, it is obvious that the building loading significantly affects the precise engineering surveying, and it must be seriously considered in application.

关键词： loading tides building loading ground deformation geoid undulation

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