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Inversion of seafloor topography in Emperor Seamount sea area by combined gravity anomalies and vertical gravity gradient anomalies data
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Fanlin Yang1, 2, Ruijie Shen1, 2, Sai Mei3, *, Zejie Tu1, 2, Mingzhen Xin1, 2
Haiyang Xuebao | 2022, 44(12) : 126 - 135
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Haiyang Xuebao | 2022, 44(12): 126-135
• Article •
Inversion of seafloor topography in Emperor Seamount sea area by combined gravity anomalies and vertical gravity gradient anomalies data
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Fanlin Yang1, 2, Ruijie Shen1, 2, Sai Mei3, *, Zejie Tu1, 2, Mingzhen Xin1, 2
Affiliations
  • 1. College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao 266590, China
  • 2. Key Laboratory of Oceanic Surveying and Mapping, Ministry of Natural Resources, Qingdao 266590, China
  • 3. Qingdao Institute of Marine Geology, China Geological Survey, Ministry of Natural Resources, Qingdao 266237, China
Published: 2022-12-01 doi: 10.12284/hyxb2022145
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The topography of the seafloor is extremely important for marine scientific surveys and research. Echo-sounding technology, represented by multi-beam sounding, is costly and inefficient, and has only achieved about 20% of the world’s seabed mapping for decades. For the remaining void area, especially the deep ocean, it can be obtained by regression analysis using gravity anomalies and vertical gravity gradient anomalies, but the robustness of scale factor is poor. To address this issue, and considering the different advantages of the two kinds of gravity data in the characterization of the long and short wavelengths of the seafloor topography, a method which combining sliding window weighting and robust regression analysis was introduced in this paper. The experimental results in the Emperor Seamount in the Pacific Ocean (35°−45°N, 165°−175°E) indicate that: taking the ship test data as the checking condition, the standard deviation of the constructed model is 61.02 m, compared with the single gravity data inversion model, the accuracy was improved 14.92% (gravity anomalies) and 2.08% (vertical gravity gradient anomalies), which can better reflect the topographic trend of the Emperor Seamount Chain.

gravity anomalies  /  vertical gravity gradient anomalies  /  seafloor topography  /  robust regression analysis  /  sliding window
Fanlin Yang, Ruijie Shen, Sai Mei, Zejie Tu, Mingzhen Xin. Inversion of seafloor topography in Emperor Seamount sea area by combined gravity anomalies and vertical gravity gradient anomalies data[J]. Haiyang Xuebao, 2022 , 44 (12) : 126 -135 . DOI: 10.12284/hyxb2022145
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Article Info
doi: 10.12284/hyxb2022145
  • Receive Date：2022-04-19
  • Online Date：2026-02-01
  • Published：2022-12-01
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History
  • Received：2022-04-19
  • Revised：2022-06-07
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Affiliations
    1. College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao 266590, China
    2. Key Laboratory of Oceanic Surveying and Mapping, Ministry of Natural Resources, Qingdao 266590, China
    3. Qingdao Institute of Marine Geology, China Geological Survey, Ministry of Natural Resources, Qingdao 266237, China
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表12种不同金属材料的力学参数
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Family		 属数
Number of
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Number of
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Percentage of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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