| Detection of the special gravity signals in sub-tidal band by using wavelet technique |
| |
| 作者姓名： | SUN Heping ZHENG Dawei DING Xiaoli CHEN Wu CHEN Xiaodong |
| |
| 作者单位： | [1]Key Laboratory of Dynamic Geodesy, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China [2]Center for Astrogeodynamics Research, Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China [3]Department of Land Surveying and Geo-Informatics, Hong Kong Polytechnic University, Hong Kong, China |
| |
| 摘 要： | With the rapid increase of the requirements to geo-dynamics of the Earth’s deep interior in global basic sciences and space techniques, the theoretical study and experimental detection of the geodynamic phenomena in Earth’s liquid core (ELC) and Earth’…
|
| 关 键 词： | gravity signals in sub-tidal band wavelet time-frequency spectrum Earth’s solid inner core Slichter modes. |
| 收稿时间： | 2005-10-08 |
| 修稿时间： | 2005-10-082005-12-14 |
Detection of the special gravity signals in sub-tidal band by using wavelet technique |
| |
| SUN Heping ZHENG Dawei DING Xiaoli CHEN Wu CHEN Xiaodong.Detection of the special gravity signals in sub-tidal band by using wavelet technique[J].Chinese Science Bulletin,2006,51(6):713-722. |
| |
| Authors: | Heping Sun Dawei Zheng Xiaoli Ding Wu Chen Xiaodong Chen |
| |
| Institution: | (1) Key Laboratory of Dynamic Geodesy, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan, 430077, China;(2) Center for Astrogeodynamics Research, Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai, 200030, China;(3) Department of Land Surveying and Geo-Informatics, Hong Kong Polytechnic University, Hong Kong, China |
| |
| Abstract: | Based on the 5-year length of tidal gravity observations recorded with a superconducting gravimeter at Wuhan International
Tidal Gravity Reference Station, the special gravity signals associated with the possible Earth’s solid inner core translational
oscillations in sub-tidal bands are detected and studied by using for the first time a wavelet transformation technique. The
analysis is conducted on gravity residuals after removing the synthetic tidal gravity signals and air pressure perturbation
from original observations, demonstrating that there exist gravity oscillation signals at 4–6 h bands with amplitude of nGal
level. However, it is found that the frequency and amplitude of such kind of oscillation signals change with time, and the
analysis shows that these oscillation signals are provoked probably by some non-continuous source with very low amplitude. |
| |
| Keywords: | gravity signals in sub-tidal band wavelet time-frequency spectrum Earth’ s solid inner core Slichter modes |
| 本文献已被 维普 万方数据 SpringerLink 等数据库收录！ |
| 点击此处可从《中国科学通报(英文版)》浏览原始摘要信息 |
| 点击此处可从《中国科学通报(英文版)》下载免费的PDF全文 |
