HR: 08:00h
AN: A51F-01    [Abstracts]
TI: Analysis of the interactions of planetary waves with the mean flow of the stratosphere
AU: * Newman, P A
EM: Paul.A.Newman@nasa.gov
AF: NASA's Goddard Space Flight Center, Code 613.3, Greenbelt, MD 20771, United States
AU: Nash, E R
EM: nash@code613-3.gsfc.nasa.gov
AF: NASA's Goddard Space Flight Center, Code 613.3, Greenbelt, MD 20771, United States
AB: During the winter period, large scale waves (planetary waves) are observed to propagate from the troposphere into the stratosphere. Such wave events have been recognized since the 1950s. The very largest wave events result in major stratospheric warmings. These large scale wave events have typical durations of a few days to 2 weeks. The wave events deposit easterly momentum in the stratosphere, decelerating the polar night jet and warming the polar region. In this presentation we show the typical characteristics of these events via a compositing analysis. We will show the typical periods and scales of motion and the associated decelerations and warmings. We will illustrate some of the differences between major and minor warming wave events. We will further illustrate the feedback by the mean flow on subsequent wave events.
DE: 0341 Middle atmosphere: constituent transport and chemistry (3334)
DE: 3319 General circulation (1223)
DE: 3334 Middle atmosphere dynamics (0341, 0342)
DE: 3362 Stratosphere/troposphere interactions
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting