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Inicio  /  Atmosphere  /  Vol: 9 Núm: 2 Par: Februar (2018)  /  Artículo
ARTÍCULO
TITULO

Numerical Study on the Effect of Air?Sea?Land Interaction on the Atmospheric Boundary Layer in Coastal Area

Zixuan Yang    
Antoni Calderer    
Sida He    
Fotis Sotiropoulos    
James D. Doyle    
David D. Flagg    
Jamie MacMahan    
Qing Wang    
Brian K. Haus    
Hans C. Graber and Lian Shen    

Resumen

We have performed large-eddy simulations (LES) to study the effect of complex land topography on the atmospheric boundary layer (ABL) in coastal areas. The areas under investigation are located at three beaches in Monterey Bay, CA, USA. The sharp-interface immersed boundary method is employed to resolve the land topography down to grid scale. We have considered real-time and what-if cases. In the real-time cases, measurement data and realistic land topographies are directly incorporated. In the what-if cases, the effects of different scenarios of wind speed, wind direction, and terrain pattern on the momentum flux at the beach are studied. The LES results are compared with simulations using the Coupled Ocean/Atmosphere Mesoscale Prediction System (COAMPS) and field measurement data. We find that the land topography imposes a critical influence on the ABL in the coastal area. The momentum fluxes obtained from our LES agree with measurement data. Our results indicate the importance of capturing the effects of land topographies in simulations.