Analysis of the Differences in Internal Solitary Wave Characteristics Retrieved from Synthetic Aperture Radar Images under Different Background Environments in the Northern South China Sea
Two internal solitary waves (ISWs) with very long fronts observed by synthetic aperture radar (SAR) images in the northern South China Sea (NSCS) are comparatively analyzed based on oceanic reanalysis data and the Korteweg–de Vries (KdV) theory. The differences in the environmental parameters, wave...
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| Format: | Article |
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MDPI AG
2023-07-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/15/14/3624 |
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| author | Pai Peng Jieshuo Xie Hui Du Shaodong Wang Pu Xuan Guanjing Wang Gang Wei Shuqun Cai |
| author_facet | Pai Peng Jieshuo Xie Hui Du Shaodong Wang Pu Xuan Guanjing Wang Gang Wei Shuqun Cai |
| author_sort | Pai Peng |
| collection | DOAJ |
| description | Two internal solitary waves (ISWs) with very long fronts observed by synthetic aperture radar (SAR) images in the northern South China Sea (NSCS) are comparatively analyzed based on oceanic reanalysis data and the Korteweg–de Vries (KdV) theory. The differences in the environmental parameters, wave half-width, and amplitude of the two ISW fronts in the two distinct oceanic environments are studied. In the presence of a weak westward surface current of approximately 0.05 m/s, the values of the linear wave speed increase by up to 0.056 m/s, and the retrieved ISW amplitudes decrease by up to 14 m. On the contrary, for another background oceanic environment considering a relatively strong eastward surface current of approximately 0.2 m/s, there are decreases of up to 0.17 m/s in the linear wave speed and increases of up to 32 m in the retrieved amplitudes. However, the results retrieved from both the SAR observations commonly show that the ISW amplitudes along the fronts reach their maximums at roughly 21°N and decrease toward the southern and northern sides, in spite of their distinct background environments. |
| first_indexed | 2024-03-11T00:41:35Z |
| format | Article |
| id | doaj.art-fb398fd12df440f7a2ddd3360c07b77d |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-11T00:41:35Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-fb398fd12df440f7a2ddd3360c07b77d2023-11-18T21:13:24ZengMDPI AGRemote Sensing2072-42922023-07-011514362410.3390/rs15143624Analysis of the Differences in Internal Solitary Wave Characteristics Retrieved from Synthetic Aperture Radar Images under Different Background Environments in the Northern South China SeaPai Peng0Jieshuo Xie1Hui Du2Shaodong Wang3Pu Xuan4Guanjing Wang5Gang Wei6Shuqun Cai7College of Meteorology and Oceanography, National University of Defense Technology, Changsha 410005, ChinaState Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, ChinaCollege of Meteorology and Oceanography, National University of Defense Technology, Changsha 410005, ChinaCollege of Meteorology and Oceanography, National University of Defense Technology, Changsha 410005, ChinaCollege of Meteorology and Oceanography, National University of Defense Technology, Changsha 410005, ChinaCollege of Meteorology and Oceanography, National University of Defense Technology, Changsha 410005, ChinaCollege of Meteorology and Oceanography, National University of Defense Technology, Changsha 410005, ChinaState Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, ChinaTwo internal solitary waves (ISWs) with very long fronts observed by synthetic aperture radar (SAR) images in the northern South China Sea (NSCS) are comparatively analyzed based on oceanic reanalysis data and the Korteweg–de Vries (KdV) theory. The differences in the environmental parameters, wave half-width, and amplitude of the two ISW fronts in the two distinct oceanic environments are studied. In the presence of a weak westward surface current of approximately 0.05 m/s, the values of the linear wave speed increase by up to 0.056 m/s, and the retrieved ISW amplitudes decrease by up to 14 m. On the contrary, for another background oceanic environment considering a relatively strong eastward surface current of approximately 0.2 m/s, there are decreases of up to 0.17 m/s in the linear wave speed and increases of up to 32 m in the retrieved amplitudes. However, the results retrieved from both the SAR observations commonly show that the ISW amplitudes along the fronts reach their maximums at roughly 21°N and decrease toward the southern and northern sides, in spite of their distinct background environments.https://www.mdpi.com/2072-4292/15/14/3624internal solitary wave (ISW)synthetic aperture radar (SAR)ambient shearamplitude retrieval |
| spellingShingle | Pai Peng Jieshuo Xie Hui Du Shaodong Wang Pu Xuan Guanjing Wang Gang Wei Shuqun Cai Analysis of the Differences in Internal Solitary Wave Characteristics Retrieved from Synthetic Aperture Radar Images under Different Background Environments in the Northern South China Sea Remote Sensing internal solitary wave (ISW) synthetic aperture radar (SAR) ambient shear amplitude retrieval |
| title | Analysis of the Differences in Internal Solitary Wave Characteristics Retrieved from Synthetic Aperture Radar Images under Different Background Environments in the Northern South China Sea |
| title_full | Analysis of the Differences in Internal Solitary Wave Characteristics Retrieved from Synthetic Aperture Radar Images under Different Background Environments in the Northern South China Sea |
| title_fullStr | Analysis of the Differences in Internal Solitary Wave Characteristics Retrieved from Synthetic Aperture Radar Images under Different Background Environments in the Northern South China Sea |
| title_full_unstemmed | Analysis of the Differences in Internal Solitary Wave Characteristics Retrieved from Synthetic Aperture Radar Images under Different Background Environments in the Northern South China Sea |
| title_short | Analysis of the Differences in Internal Solitary Wave Characteristics Retrieved from Synthetic Aperture Radar Images under Different Background Environments in the Northern South China Sea |
| title_sort | analysis of the differences in internal solitary wave characteristics retrieved from synthetic aperture radar images under different background environments in the northern south china sea |
| topic | internal solitary wave (ISW) synthetic aperture radar (SAR) ambient shear amplitude retrieval |
| url | https://www.mdpi.com/2072-4292/15/14/3624 |
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