THE NEAR-SURFACE LAYER OF THE OCEAN
3
0
0
0
0
0
4
3
c
r
dF
B g
r
dr
dr
S
³
,
(6.44)
0
s
-1
and
(6.21)
integrated from 10 Pm to 70 Pm results in the vertical length scale
estimate from (6.43) far exceeding the thickness of the atmospheric
boundary layer. Since
0
/
dF dr defined from (6.20)-(6.21) increases with
friction velocity as
3
a
u , which is the same dependence on friction velocity as
in the denominator of equation (6.43), the estimate for *
L should not change
with wind speed.
Figure 6-19. Vertical profiles of velocity and concentration in the suspension-limited flow
according to the Barenblatt and Golitsyn (1974) model.
Theoretically, the sea spray concentration in the marine boundary layer
can reach the level at which its associated stratification may suppress
turbulent fluctuations, reducing wind stress at the ocean surface. However, if
the spray generation function (6.20) holds for very high wind speed
conditions, then the influence of the sea spray on the atmospheric boundary
layer dynamics is relatively small even during hurricanes.
434
the sea spray generation function. Rough estimates for 15 m
dF / dr
where is
wind speed using the spray generation function determined from (6.20)-