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Boundary-Layer Meteorology

, Volume 128, Issue 3, pp 357–379 | Cite as

Model Simulations of the Boundary-Layer Evolution over an Arid Andes Valley

  • Inge Bischoff-Gauß
  • Norbert Kalthoff
  • Samiro Khodayar
  • Melitta Fiebig-Wittmaack
  • Sonia Montecinos
Original Paper

Abstract

The boundary layer of the Elqui valley in the arid north of Chile exhibits several interesting phenomena, such as a very shallow convective boundary layer (CBL) during the day. In the morning, warming is observed in and above the CBL, while the humidity decreases in the CBL. At midday, in and above the CBL of the valley, the temperature stagnates. In the afternoon in the CBL the temperature decreases and humidity increases, although the latent heat flux is very low. Because the characteristic features of the valley atmosphere are hard to interpret from observations alone, model simulations were applied. The simulations indicate that all components of the budget equations, i.e. the turbulent flux divergences, advection via the sea breeze, the upvalley and upslope wind systems, as well as subsidence, contribute to the evolution of the valley atmosphere.

Keywords

Elqui valley Heat budget Moisture budget Sea breeze Valley winds 

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Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Inge Bischoff-Gauß
    • 1
  • Norbert Kalthoff
    • 2
  • Samiro Khodayar
    • 2
  • Melitta Fiebig-Wittmaack
    • 3
    • 4
  • Sonia Montecinos
    • 4
  1. 1.Institute for Scientific ComputingKarlsruhe Research CentreKarlsruheGermany
  2. 2.Institute for Meteorology and Climate ResearchKarlsruhe Research Centre/University of KarlsruheKarlsruheGermany
  3. 3.Departamento de MatemáticaUniversidad de La SerenaLa SerenaChile
  4. 4.Centro de Estudios Avanzados en Zonas Aridas (CEAZA)La SerenaChile

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