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High pressure weather System over the Alps for nearly three weeks in Sept. 1999

Diurnal Mountain Winds. High pressure weather System over the Alps for nearly three weeks in Sept. 1999. H. Sep.9. 00 UTC 500hPa geopotential and surface pressure. Time series of horizontal wind vector. Time series of virtual temperature and meridional wind component.

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High pressure weather System over the Alps for nearly three weeks in Sept. 1999

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  1. Diurnal Mountain Winds High pressure weather System over the Alps for nearly three weeks in Sept. 1999 H Sep.9. 00 UTC 500hPa geopotential and surface pressure

  2. Time series of horizontal wind vector

  3. Time series of virtual temperature and meridional wind component

  4. N / S wind component – mean of Sep. 8. – 14. North South South S R S S

  5. MM5 Modell 42h simulation run 12 UTC 11. Sept. – 06 UTC 13. Sept. 39 sigma height levels 15m agl – 100hPa 4 Modell domains Δx, Δy = 27km, 9km, 3km, 1km Physical processes parameterized: - Radiation RRTM scheme (Mlawer) -boundary layer processes (Gayno Seaman scheme) cloud microphysics simple scheme (Dudheim) cumulus parameterization in outer domain (Zängl)

  6. Pot. Temperature 12. Sep. WTR Measurements NN5 Simulation

  7. Time series of pot. Temperature in the Rhine Valley

  8. N - S wind component Sep. 12. WTR Measurements NN5 Simulation

  9. Pot. Temperature @ 10m agl Sept. 12 6UTC 16UTC D W F V

  10. Wind field at 180m AGL and vertical cross section of temperature and wind on 12. Sep 06 UTC

  11. Wind field at 180m AGL and vertical cross section of temperature and wind on 12. Sep 16 UTC

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