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- W2782708553 abstract "Abstract The specification of the dynamics of the air-sea boundary layer is of fundamental importance to oceanography. There is a voluminous literature on the subject, however a strong link between the velocity profile due to waves and that due to turbulent processes in the wave boundary layer does not appear to have been established. Here we specify the velocity profile due to the wave field using the Toba spectrum, and the velocity profile due to turbulence at the sea surface by the net effect of slip and wave breaking in which slip is the dominant process. Under this specification, the inertial coupling of the two fluids for a constant viscosity Ekman layer yields two independent estimates for the frictional parameter (which is a function of the 10 m drag coefficient and the peak wave period) of the coupled system, one of which is due to the surface Ekman current and the other to the peak wave period. We show that the median values of these two estimates, evaluated from a ROMS simulation over the period 2011–2012 at a station on the Southern Shelf in the South Australian Basin, are similar in strong support of the air-sea boundary layer model. On integrating over the planetary boundary layer we obtain the Ekman transport ( w * 2 f ) and the wave transport due to a truncated Toba spectrum ( w * z B κ ) where w* is the friction velocity in water, f is the Coriolis parameter, κ is von Karman's constant and z B = g T 2 8 π 2 is the depth of wave influence in which g is the acceleration of gravity and T is the peak wave period. A comparison of daily estimates shows that the wave transports from the truncated Toba spectrum and from the SWAN spectral model are highly correlated (r = 0.82) and that on average the Toba estimates are about 86% of the SWAN estimates due to the omission of low frequency tails of the spectra, although for wave transports less than about 0.5 m2 s−1 the estimates are almost equal. In the South Australian Basin the Toba wave transport is on average about 42% of the Ekman transport." @default.
- W2782708553 created "2018-01-26" @default.
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- W2782708553 date "2018-02-01" @default.
- W2782708553 modified "2023-09-27" @default.
- W2782708553 title "Wave transport in the South Australian Basin" @default.
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- W2782708553 doi "https://doi.org/10.1016/j.csr.2017.12.010" @default.
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