Microseisms Generated by Super Typhoon Megi in the Western Pacific Ocean
文献类型：期刊论文
| 作者 | Lin, JM; Lin, J; Xu, M; jlin@whoi.edu; mxu@scsio.ac.cn |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
 |
| 出版日期 | 2018 |
| 卷号 | 122期号:12页码:9518-9529 |
| 英文摘要 | Microseisms generated by the super typhoon Megi (13-24 October 2010) were detected on both land-based and island-based seismic stations. We applied temporal frequency spectrum analysis to investigate the temporal evolution of the microseisms. When Megi was over the deep basins of the Philippine Sea, only weak microseisms with short-period double frequency (SPDF, similar to 0.20-0.40 Hz) were observed. However, after Megi traveled into the shallower waters of the South China Sea, microseisms with both long-period double frequency (LPDF, similar to 0.12-0.20 Hz) and SPDF were recorded. The excitation source regions of the microseisms were analyzed using seismic waveform records and synthetic modeling in frequency domain. Results reveal that part of the LPDF microseisms were excited in coastal source regions, while the intensity of both LPDF and SPDF microseisms correlated well with the distance from seismic stations to the typhoon center. Synthetic computations of equivalent surface pressure and corresponding microseisms show that the wave-to-wave interaction induced by coastal reflection has primary effects on microseismic frequency band of similar to 0.10-0.20 Hz. The coastal generation of the dispersive LPDF microseisms is also supported by the observation of ocean swells induced by Megi through the images of C-band ENVISAT-ASAR satellite during its migration process. Two source regions of the microseisms during the life span of Megi are finally distinguished: One was mainly located in the left-rear quadrant of the typhoon center that generated both LPDF and SPDF microseisms at shallow seas, while the other one was near the coasts that generated mostly LPDF microseisms. |
| 学科主题 | Oceanography |
| WOS关键词 | microseisms ; typhoon ; ocean wave ; source region ; generation mechanism |
| 资助项目 | MSG |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/17167]  |
| 专题 | 南海海洋研究所_中科院边缘海地质重点实验室 |
| 通讯作者 | jlin@whoi.edu; mxu@scsio.ac.cn |
| 推荐引用方式 GB/T 7714 | Lin, JM,Lin, J,Xu, M,et al. Microseisms Generated by Super Typhoon Megi in the Western Pacific Ocean[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2018,122(12):9518-9529. |
| APA | Lin, JM,Lin, J,Xu, M,jlin@whoi.edu,&mxu@scsio.ac.cn.(2018).Microseisms Generated by Super Typhoon Megi in the Western Pacific Ocean.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,122(12),9518-9529. |
| MLA | Lin, JM,et al."Microseisms Generated by Super Typhoon Megi in the Western Pacific Ocean".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 122.12(2018):9518-9529. |
入库方式： OAI收割
来源：南海海洋研究所
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