详细信息
- 责任者：Song Haibin (Key Laboratory of Petroleum Resources Research ; Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Beijing 100029 ; China) ; Bai Yang
- 刊名：Chinese Journal of Geophysics
- 出版年：2010
- 卷期：53(2)
- 关键词：内波 ; internal waves ; 地震勘探 ; seismic exploration ; 海洋物探 ; marine geophysical exploration
- 页码：p.393-400
- 图表：7 illus., 21 refs.
- 分类号：0200
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
摘要
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">pt; FONT-FAMILY: Verdana">Research on ocean internal waves by seismic oceanography is a frontier issue concerned by marine geophysicists and physical oceanographers. The paper applied Empirical Mode Decomposition (EMD) method of a new time-frequency analysis tool- Hilbert-Huang transform for studying vertical displacement data of internal waves in the northeastern pace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />place w:st="on">South China Sea place> from seismic data and obtained new results. It showed that the internal waves above the central place w:st="on">pe w:st="on">basin pe> of South China Sea place> consist of components of different wavelength of around 1.2, 2.5, 4, pace="True" Negative="False" NumberType="1" TCSC="0">12.5 km . The internal waves of the wavelength of 1.2 and pace="True" Negative="False" NumberType="1" TCSC="0">2.5 km are coupled between the upper and the lower part within the depth range of 200~pace="True" Negative="False" NumberType="1" TCSC="0">1050 m , while the separated interface located at 600~pace="True" Negative="False" NumberType="1" TCSC="0">700 m exists for the internal waves of the wavelength of around 4 and pace="True" Negative="False" NumberType="1" TCSC="0">12.5 km and the phase change is about 90° between the upper and the lower part, which infers oblique propagation of low wave-number internal waves energy. It inferred there is nice potential application of EMD method in seismic oceanography research.pt">pace prefix = o ns = "urn:schemas-microsoft-com:office:office" />p> p>