13.1 Convectively-coupled gravity waves in the tropics

Friday, 12 June 2009: 8:00 AM
Pinnacle BC (Stoweflake Resort and Confernce Center)
Stefan N. Tulich, CIRES/Univ. of Colorado, Boulder, CO; and G. Kiladis

Observations are presented showing evidence for a strong, two-way coupling between tropical convection and zonally-propagating gravity wave disturbances with periods < 2 days and zonal scales < 1000 km. To address the question of why westward-moving waves are seemingly preferred over eastward-moving, we describe results from explicit three-dimensional simulations of convection on an equatorial beta-plane, both with and without vertical shear of the background zonal flow.
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