Observations and modeling of breaking waves in the lee of the Medicine Bow Mountains
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Observations and modeling of breaking waves in the lee of the Medicine Bow Mountains

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Observations and modeling of breaking waves in the lee of the Medicine Bow Mountains




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Presentation on theme: "Observations and modeling of breaking waves in the lee of the Medicine Bow Mountains"— Presentation transcript:

Slide1

Observations and modeling of breaking waves in the lee of the Medicine Bow Mountains

Jeffrey R French1, S. Haimov1, V. Grubišić2, M. Xiao3, L. Oolman11 University of Wyoming, Laramie, WY2 University of Vienna, Vienna, Austria3 Desert Research Institute, Reno, NVSupported through NASA and NSF

19 August, 2009

13

th

Conf. on

Mesoscale

Processes

Slide2

19 August, 2009

13th Conf. on Mesoscale Processes NASA 06 Field Campaign

Pennock

Mountain

Medicine Bow Peak

Sheep Mountain

Slide3

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.)19 August, 200913th Conf. on Mesoscale Processes

Wind Dir

January 26, 2006

NASA06 Field Campaign

Slide4

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

Δx

= 333 m

60 sigma-z levels

Slide5

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

Slide6

Vertical Wind (Single Doppler)

19 August, 200913th Conf. on Mesoscale Processes t = 0 min

t = 14 min

t = 48 min

t = 59 min

Regions of stronger turbulence, weakening with time

Slide7

19 August, 2009

13th Conf. on Mesoscale Processes Location ofMaximum W

No downstream

Waves

Strong

Turbulence

Potential Temperature:

UWKA

Vertical

Wind: Dual Doppler & UWKA

LEG 1

Slide8

19 August, 2009

13th Conf. on Mesoscale Processes Location of firstMaximum W

Much weaker

Turbulence

Multiple

downstream

Waves

Vertical

Wind: Dual Doppler & UWKA

Potential Temperature:

UWKA

LEG 3

Slide9

Initial Modeling Effort for Feb05:

19 August, 200913th Conf. on Mesoscale Processes

1400

1430

1500

Slide10

19 August, 2009

13th Conf. on Mesoscale Processes Initial Modeling Effort for Feb05:

Potential Temperature: Model and Observations at 1430Z

Wind Speed: Model and Observations at 1430Z

Slide11

19 August, 2009

13th Conf. on Mesoscale Processes Initial Modeling Effort for Feb05:

Potential Temperature: Model and Observations at 1430Z: Leg 3

Vertical Velocity: Model and Observations at 1430Z: Leg 3

Slide12

19 August, 2009

13th Conf. on Mesoscale Processes