Pierson-Moskowitz - Peak Period vs Wind
Peak spectral period T_p of the Pierson-Moskowitz fully-developed sea given 19.5 m wind speed - the fundamental fully-developed-sea relationship.
Peak period T_p
14.6s
H_s
8.56m
Formula, assumptions, and limits
$$T_p = 7.14\,U_{19.5}/g, \quad H_s = 0.21\,U_{19.5}^2/g$$
Pierson-Moskowitz (1964) assumes infinite fetch and steady wind for > 6 hours. For fetch-limited seas use JONSWAP scaling.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $U_{19.5}$ | Wind speed at 19.5 m above sea | m/s | metocean data |
| $g$ | Gravitational acceleration | m/s² | 9.81 |
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