Physics
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufm.a32a0037p&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #A32A-0037
Physics
1620 Climate Dynamics (3309), 2487 Wave Propagation (6934), 3300 Meteorology And Atmospheric Dynamics, 3319 General Circulation, 3362 Stratosphere/Troposphere Interactions
Scientific paper
One fundamental mechanism for the dynamic troposphere-stratosphere coupling is the vertical propagation of tropospheric planetary Rossby waves into the stratosphere where these waves interact with the mean stratospheric flow. The modification of the structure of tropospheric waves due to the downward reflection of wave energy has been proposed to be the most relevant mechanism for a downward dynamic influence. NCEP reanalysis data are used to isolate characteristic features of vertical propagating Rossby waves for different seasons of the year. Interdecadal changes in these characteristic features are described and possible causes for these changes are discussed. Control simulations with different versions of the GISS model are used to investigate the sensitivity of the wave propagation to the height of the upper boundary of the atmospheric GCM.
Perlwitz Ja.
Rind David H.
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