Session 6
	Gravity Wave Observations, Modeling and Parameterization
	Organizer: Stephen Eckermann, NRL, Washington, DC Chair: Jadwiga Richter, NCAR, Boulder, CO
	8:30 AM	6.1	Gravity wave instabilities at large and small amplitudes: competition between wave-wave interactions and wave breaking (Invited Speaker)   David C. Fritts, NorthWest Research Associates, Inc., Colorado Research Associates Division, Boulder, CO
	8:55 AM	6.2	Modal and nonmodal perturbations of monochromatic high-frequency gravity waves: Primary nonlinear dynamics   Ulrich Achatz, Leibniz Institute for Atmospheric Physics (IAP), Kuehlungsborn, Germany
	9:10 AM	6.3	High resolution satellite observations of mountain waves   M. Joan Alexander, NorthWest Research Associates, Boulder, CO; and H. Teitelbaum, S. D. Eckermann, J. Gille, and J. Barnett
	9:25 AM	6.4	Comparison of satellite gravity wave measurements with a global ray tracing experiment   Peter Preusse, Juelich Research Center, 52425 Juelich, Germany; and M. Ern, S. Eckermann, R. H. Picard, J. M. Russell, and M. G. Mlynczak
	9:40 AM	6.5	Global Gravity Wave Variances from Aura MLS: Characteristics and Interpretation   Dong L. Wu, JPL, Pasadena, CA; and S. D. Eckermann
	9:55 AM	6.6	Three-dimensional characteristics of stratospheric mountain waves during T-REX   James D. Doyle, NRL, Monterey, CA; and W. A. Cooper, V. Grubisic, J. B. Jensen, Q. Jiang, and R. B. Smith
	10:10 AM		Break
	10:35 AM	6.7	The importance of small-scale gravity waves in the middle atmosphere: a modeller's perspective (Invited Speaker)   Charles McLandress, Department of Physics, University of Toronto, Canada, Toronto, ON, Canada
	11:00 AM	6.8	A sensitivity study of the middle atmosphere to changes in the parameterized momentum drag of gravity waves   Fabrizio Sassi, NCAR, Boulder, CO; and J. Richter and R. Garcia
	11:15 AM	6.9	Gravity waves captured in high-resolution global atmospheric analyses, forecasts and climate simulations using the Goddard Earth Observing System (GEOS-5) AGCM/DAS   Julio T. Bacmeister, NASA/GSFC, Greenbelt, MD; and I. S. Song, M. J. Suarez, L. L. Takacs, C. M. Tassone, and P. Pegion
	11:30 AM	6.10	Gravity-wave parameterization and the breakdown of Newton's Third Law   John F. Scinocca, CCCma, Victoria, BC, Canada; and O. Buhler and A. E. Hasha
	11:45 AM	6.11	A Mechanistic Model Study of Gravity Waves Forced by Latent Heating   David A. Ortland, NorthWest Research Associates, Bellevue, WA; and M. J. Alexander and A. Grimsdell

Thursday, 23 August 2007: 8:30 AM-12:00 PM, Multnomah

* - Indicates paper has been withdrawn from meeting

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