The influence of the Andes mountains on the South American low-level flow

A dry, hydrostatic, three-dimensional primitive equation model is used to evaluate the mechanical effect of the Andes mountains on the South American low-level flow (LLF). The model simulations reproduce the evolution of a baroclinic wave over the continent under winter and summer conditions. In bot...

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Detalles Bibliográficos
Autores principales: Campetella, C.M., Vera, C.S.
Formato: JOUR
Materias:
Mathematical models
Storms
Wave effects
Earth sciences
Geophysics
Andes mountains
atmospheric circulation
atmospheric dynamics
boundary layer
orographic effect
South America
Baroclinic waves
Basic flow
Cyclone activity
Mechanical effects
Model simulation
Seasonal changes
Three dimensional primitive equations
Warm seasons
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00948276_v29_n17_p7_Campetella
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:A dry, hydrostatic, three-dimensional primitive equation model is used to evaluate the mechanical effect of the Andes mountains on the South American low-level flow (LLF). The model simulations reproduce the evolution of a baroclinic wave over the continent under winter and summer conditions. In both seasons as a consequence of the interaction between the basic flow and the Andes, northerly LLF was reproduced east of the Andes which resembles the main characteristics of the observed flow. Moreover, seasonal changes of cyclone activity have a significant impact on the location of maximum LLF and its alignment, which exhibits a NW-SE orientation during winter and more meridional orientation in the warm season.

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