PP COLOBOC Snow Model at MeteoSwiss

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PP COLOBOCSnow Model at MeteoSwiss

• Jean-Marie Bettems
• 06.09.2010
• Moscow (RU)

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Multi-layers snow modelTerra standalone
experiments
Station at 2450m on the southern slope of the
Alps Model at2350m Dh -100m
September 2, 2007 to May 31, 2008
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Multi-layers snow modelTerra standalone
experiments, no snow analysis

• Slightly better snow/no snow with multi layer
  snow model over Northern Europe
• In Eastern Europe and over orography the new snow
  model produces larger snow depth the systematic
  underestimation of the snow height by the
  original snow model is largely removed
• The multi layer snow model works well at
  different altitudesin complex topography but
  might overestimate the snow height in some areas
• Improved representation of the ablation period
  (in spring)

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Multi-layers snow modelCOSMO-7 experiments
T_SNOW_MU(1)
T_SNOW_MU(2)
COSMO-7 experiment No snow analysis After 92h of
integration ? Lowest Tsnow below 190K !
W_SNOW
T_SNOW_MU(0)