6533b829fe1ef96bd128ab92

RESEARCH PRODUCT

Rainfall and Sea-Breeze Circulation over South-Western France

Olivier PlanchonSylvie Cautenet

subject

Atmospheric ScienceSea breezeAtmospheric circulationClimatologyMesoscale meteorologyTemperate climateOceanic climateVegetationPrecipitationSpatial distributionGeology

description

South-western France (Aquitaine region) has an oceanic temperate climate but some climatic peculiarities (irregular patterns in isohyets) are observed along a narrow coastal belt. The spatial distribution of winter and summer precipitation shows a ‘rainy strip’ located around 20 to 40 km inland. Three features allow an explanation of this distribution: synoptic flow, sea-breeze and heterogeneous land roughness (presence of the Foret des Landes). To take into account the impact of these features, numerical simulations are examined using a three-dimensional mesoscale model. The occurrence of the forest increases the possibility of precipitation during irregular patterns in isohyets. © 1997 by the Royal Meteorological Society. Int. J. Climatol. 17: 535–549, 1997.

https://doi.org/10.1002/(sici)1097-0088(199704)17:5<535::aid-joc150>3.0.co;2-l