Numerical simulation of orographic enhancement of rain with a mesoscale model

Orographie precipitation enhancement associated with the feeder–seeder mechanism proposed by Bergeron has been simulated using a two dimensional model based upon primitive equations including detailed parameterized microphysics. A case-by-case comparison is made between model results and each of 14...

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Bibliographic Details
Published in:Journal of climate and applied meteorology 1987-06, Vol.26 (6), p.661-669
Main Authors: Richard, Evelyne, Chaumerliac, Nadine, Mahfouf, Jean Francois, Nickerson, Everett C.
Format: Article
Language:English
Subjects:
artificial precipitation
Cap clouds
Cloud seeding
Clouds
Earth, ocean, space
Exact sciences and technology
External geophysics
lluvia
Meteorology
Mixing ratios
modele
Modeling
modelos
Ocean, Atmosphere
pluie
precipitacion artificial
Precipitation
precipitation artificielle
Rain
Raindrops
Sciences of the Universe
Seeding
Water in the atmosphere (humidity, clouds, evaporation, precipitation)
Wind velocity
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Description
Summary:Orographie precipitation enhancement associated with the feeder–seeder mechanism proposed by Bergeron has been simulated using a two dimensional model based upon primitive equations including detailed parameterized microphysics. A case-by-case comparison is made between model results and each of 14 well-documented precipitation episodes in southern Wales. The model reproduces the observed strong dependence of the precipitation enhancement on the low-level wind speed, as well as the weak dependence on the upwind precipitation rate. Model results also demonstrate that a satisfactory treatment of orographically enhanced precipitation requires the linking of the dynamical, thermodynamical and microphysical processes.
ISSN:0733-3021
2163-5366
DOI:10.1175/1520-0450(1987)026<0661:NSOOEO>2.0.CO;2