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Figure 5.23 Combined log-log plot of the observed dominant-wave breaking probability
b
T
versus
the modified significant peak steepness adjusted for the water-depth, wind-forcing and shear-current
influences. Four diverse field sites are shown: Black Sea (BS), Southern Ocean (SO), Lake Washing-
ton (LW) (all deep water), and Lake George (LG) (finite depth). The legend shows the correlation
coefficient based on a linear best fit in the log-log domain together with the parameterisation
(5.24)
and the
90% confidence limits. Figure is reproduced from
Babanin
et al.
(
2001
) by permission of
American Geophysical Union
±
Values of
b
T
,
,
γ
, and
H
s
/
d
are shown in
Table 5.1
for the Black Sea and
Table 5.2
for
Lake George, respectively.
For the data sets, combined from the Black Sea, Lake Washington and Southern Ocean
data points (deep water) and Lake George measurements (finite depth), dependence of the
spectral peak breaking probability
b
T
on the composite parameter is shown in
Figure 5.23
.
The data sets agree very well, and the correlation coefficient of 0.89 is very high, particu-
larly if we take into account the diversity of the data used. The exponent is approximately
quadratic in the final proposed parameterisation of
94
+
0
.
15
−
0
.
12
16
+
1
.
91
−
1
.
b
T
=
6
.
46
[
(
peak
−
0
.
055
)(
1
+
H
s
/
d
)(
1
+
)(
1
+
γ)
]
,
(5.24)
1
.
where 90% confidence limits are shown.
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