Aerodynamic and surface characteristic length scales of snow covered flat planes

Christof Gromke, Michele Guala, Costantino Manes, Benjamin Walter, Michael Lehning

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


Velocity profiles over fresh fallen snow surfaces have been measured in the SLF cold atmospheric boundary layer wind tunnel. Aerodynamic roughness lengths z0 have been estimated from log-law velocity profile fitting. In parallel, photographs of the snow surfaces have been taken and evaluated using digital image analysis giving snow surface contour line coordinates. Applying structure functions to the snow surface coordinates and statistical fitting analyses resulted in sets of surface characteristic length scales (random field approach). The synthesis of both approaches suggests a linear relationship between z0 and one of the surface characteristic length scales.

Original languageEnglish (US)
Title of host publicationISSW 09 - International Snow Science Workshop, Proceedings
Number of pages5
StatePublished - Dec 1 2009
EventInternational Snow Science Workshop, ISSW 09 - Davos, Switzerland
Duration: Sep 27 2009Oct 2 2009


OtherInternational Snow Science Workshop, ISSW 09


  • Aerodynamic roughness length
  • Digital image analysis
  • Snow surface roughness
  • Structure functions
  • Surface characteristic length scales
  • Turbulent boundary layer flow

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