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Open AccessArticle

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

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Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455, USA
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St. Anthony Falls Laboratory, University of Minnesota, Minneapolis, MN 55414, USA
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Department of Civil Engineering, Stony Brook University, Stony Brook, NY 11794-2200, USA
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Naval Research Laboratory, Monterey, CA 93943-5502, USA
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Oceanography Department, Naval Postgraduate School, Monterey, CA 93943, USA
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Department of Meteorology, Naval Postgraduate School, Monterey, CA 93943, USA
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Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL 33149, USA
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Department of Ocean Sciences, University of Miami, Miami, FL 33149, USA
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Author to whom correspondence should be addressed.
Atmosphere 2018, 9(2), 51; https://doi.org/10.3390/atmos9020051
Received: 31 October 2017 / Revised: 13 January 2018 / Accepted: 30 January 2018 / Published: 5 February 2018
(This article belongs to the Special Issue Air-Sea Coupling)
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. View Full-Text
Keywords: atmospheric boundary layer; coastal area; large-eddy simulation; immersed-boundary method; surface roughness; land topography atmospheric boundary layer; coastal area; large-eddy simulation; immersed-boundary method; surface roughness; land topography
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Yang, Z.; Calderer, A.; He, S.; Sotiropoulos, F.; Doyle, J.D.; Flagg, D.D.; MacMahan, J.; Wang, Q.; Haus, B.K.; Graber, H.C.; Shen, L. Numerical Study on the Effect of Air–Sea–Land Interaction on the Atmospheric Boundary Layer in Coastal Area. Atmosphere 2018, 9, 51.

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