Climate and Dynamics
A global morphology of gravity wave activity in the stratosphere revealed by the 8-year SABER/TIMED data
Article first published online: 1 NOV 2012
©2012. American Geophysical Union. All Rights Reserved.
Journal of Geophysical Research: Atmospheres (1984–2012)
Volume 117, Issue D21, 16 November 2012
How to Cite
2012), A global morphology of gravity wave activity in the stratosphere revealed by the 8-year SABER/TIMED data, J. Geophys. Res., 117, D21101, doi:10.1029/2012JD017676., , , and (
- Issue published online: 1 NOV 2012
- Article first published online: 1 NOV 2012
- Manuscript Accepted: 9 SEP 2012
- Manuscript Revised: 6 SEP 2012
- Manuscript Received: 24 FEB 2012
- gravity wave;
 From 8 years' SABER/TIMED temperature profiles between January 2002 and December 2009, we studied the activity of gravity waves in the stratosphere globally. Global distribution of stratospheric gravity wave potential energy was calculated from the temperature perturbations. Seasonal comparison of gravity wave potential energy Ep shows an annual variation in middle and high latitudes and a semiannual variation in the tropics. Around the equator, gravity wave interannual enhancements are identified just below the zonal wind zero (u = 0) contours corresponding to descending eastward shear phase of the QBO. Furthermore, we provide observation evidence to support the conclusion that the deep convection is a major source for the observed tropical gravity wave activity. The considerable longitude variations of largest potential energy around the equator are related not only to the specific topography and tropical convections but also to many other factors. We can infer that topography and tropical deep convection are the important sources of the gravity waves in the stratosphere, but the observed gravity waves in the tropical/subtropical stratosphere are strongly affected by winds with different QBO phases.