Internal dissipative boundary layers in the cross-equatorial flow of a grounded deep western boundary current
| Autor: | Gordon E. Swaters |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010504 meteorology & atmospheric sciences
Meteorology Equator Computational Mechanics Astronomy and Astrophysics Geophysics 01 natural sciences 010305 fluids & plasmas Boundary current Boundary layer Nonlinear system Geochemistry and Petrology Mechanics of Materials Inviscid flow Physics::Space Physics 0103 physical sciences Dissipative system Crest Astrophysics::Earth and Planetary Astrophysics Trough (meteorology) Physics::Atmospheric and Oceanic Physics Geology 0105 earth and related environmental sciences |
| Zdroj: | Geophysical & Astrophysical Fluid Dynamics. 111:91-114 |
| ISSN: | 1029-0419 0309-1929 |
| Popis: | It is known that dissipative adjustment must occur in the cross-equatorial dynamics of a deep western boundary current (DWBC) that is in planetary-geostrophic balance away from the equator. Theoretical modelling and numerical simulations suggest that the dissipative zones correspond to “small” isolated zonally-elongated regions within the trough and crest of a nonlinear stationary equatorial planetary wave that is formed as the DWBC flows eastward along the equator. An internal frictional boundary layer theory is advanced to describe the leading order structure of the DWBC in the dissipative regions, which asymptotically matches with the large scale inviscid flow characteristics in the equatorial region. |
| Databáze: | OpenAIRE |
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