Wavelet filter analysis of local atmospheric pressure effects in the long-period tidal bands
文献类型：期刊论文
| 作者 | Hu, X. -G.; Liu, L. T.; Ducarme, B.; Hsu, H. T.; Sun, H. -P. |
| 刊名 | Physics of the earth and planetary interiors
 |
| 出版日期 | 2006-11-01 |
| 卷号 | 159期号:1-2页码:59-70 |
| 关键词 | Long-period earth tide Pressure Superconducting gravimeter Wavelet filter |
| ISSN号 | 0031-9201 |
| DOI | 10.1016/j.pepi.2006.06.001 |
| 通讯作者 | Hu, x. -g.(hxg432@sohu.com) |
| 英文摘要 | It is well known that local atmospheric pressure variations obviously affect the observation of short-period earth tides, such as diurnal tides, semi-diurnal tides and ter-diurnal tides, but local atmospheric pressure effects on the long-period earth tides have not been studied in detail. this is because the local atmospheric pressure is believed not to be sufficient for an effective pressure correction in long-period tidal bands, and there are no efficient methods to investigate local atmospheric effects in these bands. the usual tidal analysis software package, such as eterna, baytap-g and vav, cannot provide detailed pressure admittances for long-period tidal bands. we propose a wavelet method to investigate local atmospheric effects on gravity variations in long-period tidal bands. this method constructs efficient orthogonal filter bank with daubechies wavelets of high vanishing moments. the main advantage of the wavelet filter bank is that it has excellent low frequency response and efficiently suppresses instrumental drift of superconducting gravimeters (sgs) without using any mathematical model. applying the wavelet method to the 13-year continuous gravity observations from sg t003 in brussels, belgium, we filtered 12 long-period tidal groups into eight narrow frequency bands. wavelet method demonstrates that local atmospheric pressure fluctuations are highly correlated with the noise of sg measurements in the period band 4-40 days with correlation coefficients higher than 0.95 and local atmospheric pressure variations are the main error source for the determination of the tidal parameters in these bands. we show the significant improvement of long-period tidal parameters provided by wavelet method in term of precision. (c) 2006 elsevier b.v. all rights reserved. |
| WOS关键词 | GRAVITY-DATA ; TIDES |
| WOS研究方向 | Geochemistry & Geophysics |
| WOS类目 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000241327000005 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2379070 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Hu, X. -G. |
| 作者单位 | 1.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Geodesy & Geophys, Wuhan, Peoples R China 3.Observ Royal Belgique, Res Associate NFSR, B-1180 Brussels, Belgium |
| 推荐引用方式 GB/T 7714 | Hu, X. -G.,Liu, L. T.,Ducarme, B.,et al. Wavelet filter analysis of local atmospheric pressure effects in the long-period tidal bands[J]. Physics of the earth and planetary interiors,2006,159(1-2):59-70. |
| APA | Hu, X. -G.,Liu, L. T.,Ducarme, B.,Hsu, H. T.,&Sun, H. -P..(2006).Wavelet filter analysis of local atmospheric pressure effects in the long-period tidal bands.Physics of the earth and planetary interiors,159(1-2),59-70. |
| MLA | Hu, X. -G.,et al."Wavelet filter analysis of local atmospheric pressure effects in the long-period tidal bands".Physics of the earth and planetary interiors 159.1-2(2006):59-70. |
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来源：中国科学院大学
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