Chapter 6: mesoscale gravity waves. This ppt summarizes the slides in the textbook. The theory is covered in class. Note: this ppt does not include section 6.6 Bores. Iowa gravity wave time lapse movie mpeg You Tube. Ireland. UK. cold front. 5/24/2002, 21:07 UTC – IHOP. Aral Sea.
Chapter 6: mesoscale gravity waves This ppt summarizes the slides in the textbook. The theory is covered in class. Note: this ppt does not include section 6.6 Bores.
Iowa gravity wave time lapse movie mpeg You Tube
Ireland UK cold front
Fig. 6.1: isochrones of a mesoscale gravity wave crest during a major East Coast snowstorm. The wave was detected in the pressure trace. The wind barbs indicate the vector surface wind shift upon wave passage. x Greensboro (GSO)
moist adiabat (qw=16°C) dry adiabat (q=46°C) Fig. 6.9: the mesoscale gravity wave event may have been triggered by elevated convection, or gravity wave adjustment. The stable low-level layer may have allowed wave ducting towards the NE. qw values (°C)
Fig. 6.2: SLP analysis in a Midwest snowstorm. dotted lines: wave crests, dashed lines: troughs
Fig. 6.10: schematic of a linear plane mesoscale gravity wave propagating to the right (Uo=0)
Fig. 6.6: polarization relations between q’, p’, u’, and w’ in a westward tilting internal gravity wave blue = cold, red = warm
Critical level: level where wave energy is absorbed cg c Fig. 6.7 Fig. 6.8
geostrophic adjustment: principle • Rossby radius of deformation: • see COMET module • “the balancing act of geostrophic adjustment” • see YouTube video: • geostrophic adjustment: inertio-gravity waves and the Coriolis force