Measurements of Drag Coefficients and Roughness Length at a Sea-Beach Interface
Open Access
- 1 April 1981
- journal article
- Published by American Meteorological Society in Journal of Applied Meteorology
- Vol. 20 (4) , 335-340
- https://doi.org/10.1175/1520-0450(1981)020<0335:modcar>2.0.co;2
Abstract
During unstable conditions the drag coefficient of the surf zone and the roughness length of a sand beach have been measured. It is concluded from ∼100 half-hour profiles that the drag coefficient under unstable conditions over the surf zone is the same as over the ocean. For wind speeds 8 m s−1 the roughness length of a sand beach is ∼10 times higher than the value measured below 6 m s−1. This jump is related to aeolian sand transport at high wind speeds.Keywords
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