Sea-breeze scaling from numerical model simulations, part II: Interaction between the sea breeze and slope flows

Porson, Aurore;Steyn, Douw G.;Schayes, Guy
(2007) Boundary-Layer Meteorology : an international journal of physical and biological processes in the atmospheric boundary layer — Vol. 122, n° 1, p. 31-41 (2007)

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Authors
  • Porson, Aurore
    Author
  • Steyn, Douw G.
    Author
  • Schayes, GuyUCLouvain
    Author
Abstract
Numerical model simulations of sea-breeze circulations in the presence of idealized topography are subjected to dimensional analysis in order to capture the dynamics of the sea-breeze circulation combined with an upslope-flow circulation. A secondary objective is to reconcile previous results based on observations. The analysis is based on a scaling analysis of sea-breeze speed, depth and volume flux. This study is motivated by the fact that the literature of sea breezes interacting with upslope flows is generally qualitative. Results show clear scaling regimes and strong interaction between the two thermally driven circulations. We distinguish three regimes, depending on slope length, slope angle, stability and surface heat flux. The first and third regimes obey the scaling laws of pure sea-breeze scaling. The second regime shows a significant decrease in the scaled volume flux relative to pure sea-breeze scaling. Dynamical relations in the second regime show a strong influence on the circulation of upslope stable air advection.
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Porson, A., Steyn, D. G., & Schayes, G. (2007). Sea-breeze scaling from numerical model simulations, part II: Interaction between the sea breeze and slope flows. Boundary-Layer Meteorology : an international journal of physical and biological processes in the atmospheric boundary layer, 122(1), 31-41. https://doi.org/10.1007/s10546-006-9092-2 (Original work published 2007)