BEGIN:VCALENDAR
PRODID:-//WEGC Common Space Presentation Calendar//
VERIONS:2.0
BEGIN:VEVENT
SUMMARY:The Mountain Boundary Layer (MoBL) – its relevance for weather\,
  climate and applied simulations (by Mathias Rotach)
DTSTART:20250522T090000Z
DTEND:20250522T103000Z
DTSTAMP:20250416T092006Z
UID:presentation-166.series-10
DESCRIPTION:Over complex\, mountainous terrain\, the lowest layer of the a
 tmosphere has to be considered as the ‘Mountain Boundary Layer ‘(MoBL)
 . Different to its counterpart over flat terrain\, the MoBL is characteriz
 ed by intrinsic horizontal heterogeneity\, three-dimensionality and failur
 e of many of the well-known boundary layer parameterizations. For applicat
 ions such as hydro- power (renewable energy) simulations\, avalanche warni
 ngs\, landslides (and other consequences of extreme mountain weather)\, th
 ere is therefore a fundamental problem: the available input information st
 ems from atmospheric (mostly NWP) modeling output\, which in turn is based
  on horizontally homogeneous and flat conditions. In more general terms: a
 s long as output from NWP is used for traditional weather prediction purpo
 ses (temperature\, precipitation and wind)\, it may be not so important wh
 ether the boundary layer parameterization is physically sound or only well
 -tuned. If it is used as input for application models\, the MoBL forecast 
 must be ‘right for the right reason’. If we extend the world’s land 
 surface area from the truly mountainous fraction to hilly terrain\, almost
  70% of the planet’s land surface are affected\, thus rendering a proper
 \, physically based characterization of the boundary layer under such cond
 itions crucial.\nIn this contribution\, the MoBL is introduced\, as well a
 s the largest challenges we face in its description\, physical characteriz
 ation and modeling. TEAMx (Multi-scale Transport and Exchange processes in
  the Atmosphere over Mountains – programme and experiment) is furthermor
 e introduced as a large international research program\, that seeks to adv
 ance or understanding of MoBL and meso-scale atmospheric processes over mo
 untains.
LOCATION:SR Wegener Center\, Brandhofgasse 5\, 1st floor
ORGANIZER;CN="Douglas Maraun";ROLE=CHAIR:MAILTO:douglas.maraun@uni-graz.at
END:VEVENT
END:VCALENDAR