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Doyle, James D. (2011)
Publisher: Co-Action Publishing
Journal: Tellus A
Languages: English
Types: Article
Subjects:
The impact of wind-generated ocean waves upon the structure and evolution of an idealized cyclone is investigated. High-resolution numerical experiments were performed with a constant surface roughness, roughness length from Charnock's formula, and from a coupled ocean-wave/atmosphere mesoscale model. Results indicate that young ocean waves increase the effective surface roughness, increase the surface stress, significantly decrease the 10-m wind speeds and modulate the heat and moisture transport between the atmosphere and ocean. These effects are maximized along the warm front and to the rear of the cyclone near the southwestern quadrant. As a result of this boundary layer modification, the mesoscale structures associated with the cyclone are perturbed. Regions of young windsea act to locally enhance the low-level frontogenesis, convergence and rainfall. Roughness effects associated with ocean waves modulate the deepening rate during rapid cyclogenesis and enhance the cyclone filling process. Kinetic energy of the entire cyclone system is reduced significantly near the surface and by 3–8% above the boundary layer as a result of enhanced roughness associated with young ocean waves.DOI: 10.1034/j.1600-0870.1995.00119.x
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