Physics
Scientific paper
Jun 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3412803h&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 12, CiteID L12803
Physics
7
Atmospheric Processes: Middle Atmosphere Dynamics (0341, 0342), Global Change: Global Climate Models (3337, 4928), Global Change: Climate Dynamics (0429, 3309), Atmospheric Processes: Stratosphere/Troposphere Interactions, Atmospheric Processes: General Circulation (1223)
Scientific paper
An ensemble of integrations of a troposphere-stratosphere general circulation model is used to distinguish between externally forced (principally by sea-surface temperatures) and internally generated interannual variability in the zonal mean stratospheric circulation. Forced variability is identified as that evident in the ensemble mean. Internal variability is identified with differences between ensemble members. The spatial and seasonal variation in the partitioning between forced and internal variability is examined. It is argued that the significantly larger forced interannual variability seen in the tropical lower stratosphere is not simply an upward extension of the tropical tropospheric variability, but is associated with coherent interannual variability in subtropical stratospheric wave driving.
Butchart Neal
Hardiman Steven C.
Hare Sylvia H. E.
Haynes Peter H.
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