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Modelling in the Coquimbo Region

Modelling in the Coquimbo Region. Melitta Fiebig Wittmaack + Inge Bischoff-Gauss (IWR/FZK) + Orlando Astudillo. ¿What is KAMM?. K arlsruhe M esoscale A tmospheric M odel ( Adrian and Fiedler .) non- hydrostatic complex topography (terrain following coordinate system)

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Modelling in the Coquimbo Region

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  1. Modelling in the Coquimbo Region Melitta Fiebig Wittmaack + Inge Bischoff-Gauss (IWR/FZK) + Orlando Astudillo

  2. ¿What is KAMM? • Karlsruhe Mesoscale Atmospheric Model (Adrian and Fiedler .) • non- hydrostatic • complex topography (terrain following coordinate system) • chemical module coupling, aerosol module coupling, etc.

  3. Input: Datos de entrada requeridos: + vertical soundings of wind, temperature and humidity

  4. Output: 3D distributions of • wind • temperature • humidity • concentrations of chemical species

  5. Dt < 2 sec, Dx = 4.7 km H = 15 km First step: the larger flow-field with coarse discretization (Kalthoff et al. 2002)

  6. Second step: smaller simulation area with finer discretization and 1 nesting

  7. a: Δx = 1461 m, Δy = 1788 m i: Δx = 730.5 m, Δy = 894 m

  8. Third step: The influence of the Embalse Puclaro on the local climate; 3 nestings and finest discretization (with Inge Bischoff-Gauß, IWR)

  9. Simulated potential temperature rel. humidity on a summer day

  10. March 2000,Dec. 2001, Nov. 2003 Radiosoundings at La Serena, Vicuña and Cerro Tololo December 2001 Turbul. measurements at Cerro Tololo

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