Seafloor Topography Estimation From Gravity Gradients Using Simulated Annealing
文献类型：期刊论文
| 作者 | Liu, Lintao1; Jekeli, Christopher2; Yang, Junjun3 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
 |
| 出版日期 | 2018-08-01 |
| 卷号 | 123期号:8页码:6958-6975 |
| ISSN号 | 2169-9313 |
| DOI | 10.1029/2018JB015883 |
| 英文摘要 | Inferring seafloor topography from gravity anomaly currently is the dominant method to obtain a global view of the oceans. Standard techniques rely on an approximate, linear relationship between topography and gravity, which is valid only if the local topography is smooth compared with the regional topography, so the estimation accuracy in the very rugged areas is low. Current methods can be improved by removing the linear approximation and estimating the topography through simulated annealing and by using gravity gradiometry that is more sensitive to topography at short wavelengths than the gravity anomaly. Simulated annealing is a global optimization technique that can process nonlinear inverse problems. It is developed to estimate the seafloor depths by minimizing the difference between the observed and forward-computed vertical gravity gradients. The method is tested on altimetry-derived gravity gradients in a 2(degrees)x2(degrees) area of rugged seafloor topography in the West Pacific Ocean and results in estimates with a root-mean-square error of +/- 236 m. Compared to estimates from an existing model obtained by standard techniques this represents an accuracy improvement of 22%. |
| 资助项目 | Friend of Orton Hall travel award ; Ohio Supercomputer Center |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000446170700047 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/5896]  |
| 专题 | 中国科学院武汉植物园 |
| 通讯作者 | Jekeli, Christopher; Yang, Junjun |
| 作者单位 | 1.Chinese Acad Sci, Inst Geodesy & Geophys, State Key Lab Geodesy & Earths Dynam, Wuhan, Hubei, Peoples R China 2.Ohio State Univ, Sch Earth Sci, Div Geodet Sci, Columbus, OH 43210 USA 3.Huazhong Univ Sci & Technol, Inst Geophys, Sch Phys, MOE Key Lab Fundamental Phys Quant Measurement, Wuhan, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Lintao,Jekeli, Christopher,Yang, Junjun. Seafloor Topography Estimation From Gravity Gradients Using Simulated Annealing[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2018,123(8):6958-6975. |
| APA | Liu, Lintao,Jekeli, Christopher,&Yang, Junjun.(2018).Seafloor Topography Estimation From Gravity Gradients Using Simulated Annealing.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,123(8),6958-6975. |
| MLA | Liu, Lintao,et al."Seafloor Topography Estimation From Gravity Gradients Using Simulated Annealing".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 123.8(2018):6958-6975. |
入库方式： OAI收割
来源：武汉植物园
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