Internal waves include soliton of period 10-20 minutes and tidal frequency waves. Large internal solitons with amplitude over 100 m were observed frequently in the South China Sea (SCS). There were convergence zones of 500-1000 m wide in the wave front of solitons which can be detected by satellite from the space.
The hypothesis of this study is the internal wave signal can be extracted from the sea surface anomalies of satellite altimetry. Data analyzed include TOPEX/Poseidon altimeter from August 2002 to October 2005 in the northern SCS and Kuroshio regions. Methods applied include (1) standard deviation analysis, (2) harmonic analysis and (3) wavenumber spectrum analysis.
The results show that¡]1¡^there is an annual variation in the sea surface height, which is explained due to water temperature changes in different seasons. (2) The results of harmonic analysis show that the amplitude of M2 aliasing is only a few centimeters on the sea surface. The different is small between internal active region and that of without. (3) The absolute values of slope, of internal wave energy and wavenumber spectrum, are 2-3 in the wave active region. This suggests that there are wave motions of scale 100 km or larger, which matches with the length scale of internal waves in the northern SCS.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0710112-152813 |
| Date | 10 July 2012 |
| Creators | Lu, Chung-Wei |
| Contributors | Yu-Huai Wang, Chung-Pan Lee, I-Huan Lee, I-Jiunn Cheng |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0710112-152813 |
| Rights | user_define, Copyright information available at source archive |
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