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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
Source PublicationJOURNAL OF APPLIED GEOPHYSICS
Volume128Pages:18-30
AbstractGravity 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.
SubtypeArticle
KeywordMulti-source Gravity Fusion Wavelet Transformation South China Sea Wavelet Type Decomposition Level Uncertainty Tests
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.jappgeo.2016.03.003
Indexed BySCI
Language英语
WOS KeywordSOUTH CHINA SEA ; MARINE GRAVITY ; SATELLITE ALTIMETRY ; TECTONIC STRUCTURE ; ANOMALIES ; SHIPBOARD ; SURFACE ; GEOSAT ; MARGIN ; RIDGE
WOS SubjectGeosciences, Multidisciplinary ; Mining & Mineral Processing
WOS IDWOS:000375499400003
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.idsse.ac.cn/handle/183446/1569
Collection深海科学研究部_深海地球物理与资源研究室
Affiliation1.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
Recommended Citation
GB/T 7714
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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