The impact of seasonal changes in stratification on the dynamics of internal waves in the Sea of Okhotsk
| Autor: | Andrey Kurkin, T. G. Talipova, O. E. Kurkina, Artem Rybin, Tarmo Soomere |
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| Rok vydání: | 2017 |
| Předmět: |
010504 meteorology & atmospheric sciences
lcsh:QE1-996.5 Stratification (water) internal solitons Internal wave 01 natural sciences 010305 fluids & plasmas lcsh:Geology stratification Oceanography internal waves 0103 physical sciences General Earth and Planetary Sciences Gardner’s equation Physics::Atmospheric and Oceanic Physics Geology Sea of Okhotsk 0105 earth and related environmental sciences Water Science and Technology |
| Zdroj: | Estonian Journal of Earth Sciences, Vol 66, Iss 4, Pp 238-255 (2017) |
| ISSN: | 1736-4728 |
| Popis: | The properties and dynamics of internal waves in the ocean crucially depend on the vertical structure of water masses. We present detailed analysis of the impact of spatial and seasonal variations in the density-driven stratification in the Sea of Okhotsk on the properties of the classic kinematic and nonlinear parameters of internal waves in this water body. The resulting maps of the phase speed of long internal waves and coefficients at various terms of the underlying Gardner’s equation make it possible to rapidly determine the main properties of internal solitary waves in the region and to choose an adequate set of parameters of the relevant numerical models. It is shown that the phase speed of long internal waves almost does not depend on the particular season. The coefficient at the quadratic term of the underlying evolution equation is predominantly negative in summer and winter and therefore internal solitons usually have negative polarity. Numerical simulations of the formation of internal solitons and solibores indicate that seasonal variations in the coefficient at the cubic term of Gardner’s equation lead to substantial variations in the shape of solibores. |
| Databáze: | OpenAIRE |
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