Observations and modeling of breaking waves in the

Observations and modeling of breaking waves in the

Observations and modeling of breaking waves in the lee of the Medicine Bow Mountains Jeffrey R French1, S. Haimov1, V. Grubii2, M. Xiao3, L. Oolman1 University of Wyoming, Laramie, WY 2 University of Vienna, Vienna, Austria 3 Desert Research Institute, Reno, NV 1 Supported through NASA and NSF 19 August, 2009

13th Conf. on Mesoscale Processes NASA 06 Field Campaign Pennock Mountain Medicine Bow Peak Sheep Mountain 19 August, 2009

13th Conf. on Mesoscale Processes Objectives: 1. Use observations to describe the internal structure of mountain-induced breaking waves and rotors (scales, turbulent intensity, etc) Example: (2008 Mtn Met. Conf.) Wind Dir January 26, 2006 NASA06 Field Campaign 19 August, 2009

13th Conf. on Mesoscale Processes Objectives: 2. Use numerical simulations to interpret observations and examine environmental conditions under which these features formed Example: (2009 ICAM) NRL COAMPS Model 5 Nested Domains Innermost domain x = 333 mx = 333 m 60 sigma-z levels 19 August, 2009

13th Conf. on Mesoscale Processes Feb 05 Case: Multiple Passes over >1 hour wave transitions from turbulent, breaking(?) to laminar, trapped Lee-wave Wind Dir Pass 1 19 August, 2009 13th Conf. on Mesoscale Processes

Vertical Wind (Single Doppler) Regions of stronger turbulence, weakening with time t = 0 min t = 14 min t = 48 min t = 59 min 19 August, 2009

13th Conf. on Mesoscale Processes Potential Temperature: UWKA LEG 1 Vertical Wind: Dual Doppler & UWKA Location of Maximum W 19 August, 2009 Strong No downstream

Turbulence Waves th 13 Conf. on Mesoscale Processes Potential Temperature: UWKA LEG 3 Vertical Wind: Dual Doppler & UWKA Location of first Maximum W 19 August, 2009

Multiple downstream Waves Much weaker Turbulence 13th Conf. on Mesoscale Processes Initial Modeling Effort for Feb05: 1400 19 August, 2009

1430 1500 13th Conf. on Mesoscale Processes Initial Modeling Effort for Feb05: Potential Temperature: Model and Observations at 1430Z 19 August, 2009

Wind Speed: Model and Observations at 1430Z 13th Conf. on Mesoscale Processes Initial Modeling Effort for Feb05: Potential Temperature: Model and Observations at 1430Z: Leg 3 19 August, 2009

Vertical Velocity: Model and Observations at 1430Z: Leg 3 13th Conf. on Mesoscale Processes 19 August, 2009 13th Conf. on Mesoscale Processes

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