Nocturnal Meso-Beta Basin and Katabatic Flows on a Midlatitude IslandSource: Monthly Weather Review:;2007:;volume( 135 ):;issue: 003::page 918DOI: 10.1175/MWR3329.1Publisher: American Meteorological Society
Abstract: A mesoscale simulation for the island of Majorca, Spain, in the western Mediterranean Sea is used to study the nocturnal system of winds under weak synoptic pressure gradients. A very high vertical resolution is used in the first 500 m above ground level to characterize with large detail the thin circulations close to ground, namely, basin and katabatic flows. It is found that the island, the basin, and the slope scales interact strongly, especially when a quasi-steady state is reached in the second part of the night. A high mountain range creates a high pressure area upwind where local winds can develop. Katabatic flows converge to the valleys where they interact with a cold pool, which is advected slowly to sea by the land?sea night-breeze effect combined with a topographic forcing. The katabatic flows experience small entrainment at the top and have well-defined characteristics. The results are partially confirmed by the observations and some satellite images.
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contributor author | Cuxart, J. | |
contributor author | Jiménez, M. A. | |
contributor author | Martínez, D. | |
date accessioned | 2017-06-09T17:28:20Z | |
date available | 2017-06-09T17:28:20Z | |
date copyright | 2007/03/01 | |
date issued | 2007 | |
identifier issn | 0027-0644 | |
identifier other | ams-85875.pdf | |
identifier uri | http://onlinelibrary.yabesh.ir/handle/yetl/4229370 | |
description abstract | A mesoscale simulation for the island of Majorca, Spain, in the western Mediterranean Sea is used to study the nocturnal system of winds under weak synoptic pressure gradients. A very high vertical resolution is used in the first 500 m above ground level to characterize with large detail the thin circulations close to ground, namely, basin and katabatic flows. It is found that the island, the basin, and the slope scales interact strongly, especially when a quasi-steady state is reached in the second part of the night. A high mountain range creates a high pressure area upwind where local winds can develop. Katabatic flows converge to the valleys where they interact with a cold pool, which is advected slowly to sea by the land?sea night-breeze effect combined with a topographic forcing. The katabatic flows experience small entrainment at the top and have well-defined characteristics. The results are partially confirmed by the observations and some satellite images. | |
publisher | American Meteorological Society | |
title | Nocturnal Meso-Beta Basin and Katabatic Flows on a Midlatitude Island | |
type | Journal Paper | |
journal volume | 135 | |
journal issue | 3 | |
journal title | Monthly Weather Review | |
identifier doi | 10.1175/MWR3329.1 | |
journal fristpage | 918 | |
journal lastpage | 932 | |
tree | Monthly Weather Review:;2007:;volume( 135 ):;issue: 003 | |
contenttype | Fulltext |