Regional study of mode-2 internal solitary waves at the Pacific coast of Central America using marine seismic survey data

Fan, Wenhao; Song, Haibin; Gong, Yi; Yang, Shun; Zhang, Kun

doi:https://doi.org/10.5194/npg-29-141-2022

Articles | Volume 29, issue 2

https://doi.org/10.5194/npg-29-141-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Nonlinear internal waves

https://doi.org/10.5194/npg-29-141-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 29, issue 2

Research article

|

04 Apr 2022

Research article |

| 04 Apr 2022

Regional study of mode-2 internal solitary waves at the Pacific coast of Central America using marine seismic survey data

Wenhao Fan, Haibin Song, Yi Gong, Shun Yang, and Kun Zhang

Data sets

Raw Multi-Channel Seismic Shot Data from the Sandino Basin, offshore Nicaragua, acquired during R/V Maurice Ewing expedition EW0412 (2004) MGDS http://www.marine-geo.org/tools/search/entry.php?id=EW0412

Short summary

Compared with mode-1 internal solitary waves (ISWs), mode-2 ISWs in the ocean require further study. A mass of mode-2 ISWs developing at the Pacific coast of Central America have been imaged using seismic reflection data. We find that the relationship between the mode-2 ISW propagation speed and amplitude is diverse. It is affected by seawater depth, pycnocline depth, and pycnocline thickness. The ISW vertical amplitude structure is affected by the ISW nonlinearity and the pycnocline deviation.