Microseisms Generated by Super Typhoon Megi in the Western Pacific Ocean

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 中科院边缘海地质重点实验室

	Microseisms Generated by Super Typhoon Megi in the Western Pacific Ocean
	Lin, JM; Lin, J; Xu, M; jlin@whoi.edu; mxu@scsio.ac.cn
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
	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
资助项目	MSG
WOS关键词	microseisms ; typhoon ; ocean wave ; source region ; generation mechanism
内容类型	期刊论文
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.