8 Conclusion
349
There is another unsolved problem connected with the investigation of
meso-scale effects in forming the wind wave spectral structure. In particular,
it is revealed that the frequency spectrum quasi-oscillations can essentially
increase the effectiveness of non-linear energy transfer in the wave spectrum.
This calls into question some principal conclusions concerning the balance
and quantitative values of other physical mechanisms forming the wind wave
spectrum.
When solving practical problems of wave calculations in a sea, a spatial
step in tens or hundreds of miles is used and the surface wind speed in a 3 and
more hour temporal step is introduced. But this traditional approach does
not take into account the so-called "sub-grid effects", i.e. describing smallscale details of wind wave field evolution, which can be principally important.
The question of obtaining a detailed spatial and temporal description of the
wind field is connected with the general problem of meteorology, depending
on the state of this science on the whole, and the quality of the initial synoptic
data. As for the problem of calculating the wind waves, there is a series of
specific problems, for example, how to take into account meso-scale velocity
variations, such as wind flows and gusts; how the stratification of boundary
layer is affected; and how to parameterize the meso-scale effects in wind wave
models.
The investigation of these and other problems is continuing.
349
There is another unsolved problem connected with the investigation of
meso-scale effects in forming the wind wave spectral structure. In particular,
it is revealed that the frequency spectrum quasi-oscillations can essentially
increase the effectiveness of non-linear energy transfer in the wave spectrum.
This calls into question some principal conclusions concerning the balance
and quantitative values of other physical mechanisms forming the wind wave
spectrum.
When solving practical problems of wave calculations in a sea, a spatial
step in tens or hundreds of miles is used and the surface wind speed in a 3 and
more hour temporal step is introduced. But this traditional approach does
not take into account the so-called "sub-grid effects", i.e. describing smallscale details of wind wave field evolution, which can be principally important.
The question of obtaining a detailed spatial and temporal description of the
wind field is connected with the general problem of meteorology, depending
on the state of this science on the whole, and the quality of the initial synoptic
data. As for the problem of calculating the wind waves, there is a series of
specific problems, for example, how to take into account meso-scale velocity
variations, such as wind flows and gusts; how the stratification of boundary
layer is affected; and how to parameterize the meso-scale effects in wind wave
models.
The investigation of these and other problems is continuing.