Would you please kindly explain the following? (about as much as is carried by the wind in a layer about one wavelength thick), and so the wave-generation process is far from negligible.
(about as much as is carried by the wind in a layer about one wavelength thick), and so the wave-generation process is far from negligible. Translation: About the same amount (of stuff) moves with the air in a layer that is one wavelength (of something) wide. Therefore the process of creating waves (whatever it is) is important and can't be ignored.