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A wavelet transformation approach for multi-source gravity fusion: Applications and uncertainty tests
Bai, Yongliang1,2; Dong, Dongdong3; Wu, Shiguo4; Liu, Zhan1; Zhang, Guangxu3; Xu, Kaijun1
2016-05-01
发表期刊JOURNAL OF APPLIED GEOPHYSICS
卷号128页码:18-30
文章类型Article
摘要Gravity anomalies detected by different measurement platforms have different characteristics and advantages. There are different kinds of gravity data fusion methods for generating single gravity anomaly map with a rich and accurate spectral content. Former studies using wavelet based gravity fusion method which is a newly developed approach did not pay more attention to the fusion uncertainties. In this paper, we firstly introduce the wavelet based gravity fusion method, and then apply this method to one synthetic model and also to the northern margin of the South China Sea. Wavelet type and the decomposition level are two input parameters for this fusion method, and the uncertainty tests show that fusion results are more sensitive to wavelet type than the decomposition level. The optimal application result of the fusion methodology on the synthetic model is closer to the true anomaly field than either of the simulated shipborne anomaly and altimetry-based anomaly grid. The best fusion result on the northern margin of the South China Sea is based on the 'rbio1.3' wavelet and four-level decomposition. The fusion result contains more accurate short-wavelength anomalies than the altimetry-based gravity anomalies along ship tracks, and it also has more accurate long wavelength characteristics than the shipborne gravity anomalies between ship tracks. The real application case shows that the fusion result has better correspondences to the seafloor topography variations and sub-surface structures than each of the two input gravity anomaly maps (shipborne based gravity anomaly map and altimetry based gravity anomaly map). Therefore, it is possible to map and detect more precise seafloor topography and geologic structures by the new gravity anomaly map. (C) 2016 Elsevier B.V. All rights reserved.
关键词Multi-source Gravity Fusion Wavelet Transformation South China Sea Wavelet Type Decomposition Level Uncertainty Tests
DOI10.1016/j.jappgeo.2016.03.003
收录类别SCI
语种英语
WOS记录号WOS:000375499400003
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/131060
专题海洋地质与环境重点实验室
作者单位1.China Univ Petr, Sch Geosci, 66 Changjiang West Rd, Qingdao 266580, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266071, Peoples R China
3.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, 7 Nanhai Rd, Qingdao 266071, Peoples R China
4.Chinese Acad Sci, Sanya Inst Deep Sea Sci & Engn, 62Fenghuang Rd, Sanya 572000, Peoples R China
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Bai, Yongliang,Dong, Dongdong,Wu, Shiguo,et al. A wavelet transformation approach for multi-source gravity fusion: Applications and uncertainty tests[J]. JOURNAL OF APPLIED GEOPHYSICS,2016,128:18-30.
APA Bai, Yongliang,Dong, Dongdong,Wu, Shiguo,Liu, Zhan,Zhang, Guangxu,&Xu, Kaijun.(2016).A wavelet transformation approach for multi-source gravity fusion: Applications and uncertainty tests.JOURNAL OF APPLIED GEOPHYSICS,128,18-30.
MLA Bai, Yongliang,et al."A wavelet transformation approach for multi-source gravity fusion: Applications and uncertainty tests".JOURNAL OF APPLIED GEOPHYSICS 128(2016):18-30.
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