Sea-Breeze Modification Of The Growth Of A Marine Internal Boundary Layer
| Autor: | Robert S. Plant, B. W. Atkinson |
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| Rok vydání: | 2002 |
| Předmět: | |
| Zdroj: | Boundary-Layer Meteorology. 104:201-228 |
| ISSN: | 1573-1472 0006-8314 |
| DOI: | 10.1023/a:1016045229957 |
| Popis: | A numerical mesoscale model is used to make a high-resolution simulation of the marine boundary layer in the Persian Gulf, during conditions of offshore flow from Saudi Arabia. A marine internal boundary layer (MIBL) and a sea-breeze circulation (SBC) are found to co-exist. The sea breeze develops in the mid-afternoon, at which time its front is displaced several tens of kilometres offshore. Between the coast and the sea-breeze system, the MIBL that occurs is consistent with a picture described in the existing literature. However, the MIBL is perturbed by the SBC, the boundary layer deepening significantly seaward of the sea-breeze front. Our analysis suggests that this strong, localized deepening is not a direct consequence of frontal uplift, but rather that the immediate cause is the retardation of the prevailing, low-level offshore wind by the SBC. The simulated boundary-layer development can be accounted for by using a simple 1D Lagrangian model of growth driven by the surface heat flux. This model is obtained as a straightforward modification of an established MIBL analytic growth model. |
| Databáze: | OpenAIRE |
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