East Asia and Western Pacific METEOROLOGY AND CLIMATE

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phase velocity; both ratios, therefore, have smaller values. We see,
in Fig. 3, for those short but choppy waves at smaller wave ages, or
short-fetches, the wind-stress coefficient is greater. These aspects
have yet to be incorporated into the models; but you must, as its
effects are seen very significant.
T I I
4 6 8 tO
Wav* A$«. c/u.
Figure 3. Variations of Wind-Stress Coefficient with Wave Age. This
is reproduced from Wu (1985a).
Ul0(mf 1 ):
10
0.2
to 1 id 2 to 3
Nondimwisionai
10* to* 10*
Figure 4,
Ratios Between Wave-Drag and Wind-Stress Coefficients at
Various Nondimensional Fetches. This is reproduced from
Wu (1988).
To oceanographers, the important thing is the wind-driven ocean
circulation, but the energy comes from the wind is partitioned between
currents and waves (Wu 1975) . We have studied this partition in the