Idealized Large-Eddy Simulations of Sea and Lake Breezes: Sensitivity to Lake Diameter, Heat Flux and Stability |
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| Authors: | Erik T Crosman John D Horel |
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| Institution: | (1) Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, NC 27695-8208, USA;(2) Indian Institute of Technology, Kharagpur, India;(3) Indian Institute of Technology, Chennai, India;(4) Indian Institute of Technology, New Delhi, India;(5) India Meteorological Department, Chennai, India;(6) Lawrence Livermore National Laboratory, 7000 East Avenue, L103, Livermore, CA 94551-0808, USA |
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| Abstract: | Idealized large-eddy simulations of lake and sea breezes are conducted to determine the sensitivity of these thermally-driven circulations to variations in the land-surface sensible heat flux and initial atmospheric stability. The lake-breeze and sea-breeze metrics of horizontal wind speed, horizontal extent, and depth are assessed. Modelled asymmetries about the coastline in the horizontal extent of the low-level onshore flow are found to vary as a function of the heat flux and stability. Small lake breezes develop similarly to sea breezes in the morning, but have a significantly weaker horizontal wind-speed component and a smaller horizontal extent than sea breezes in the afternoon. |
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