Physics
Scientific paper
Mar 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3305703k&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 5, CiteID L05703
Physics
4
Atmospheric Composition And Structure: Middle Atmosphere: Constituent Transport And Chemistry (3334), Global Change: Solar Variability (7537), Global Change: Climate Variability (1635, 3305, 3309, 4215, 4513), Atmospheric Processes: Stratosphere/Troposphere Interactions, Atmospheric Processes: Global Climate Models (1626, 4928)
Scientific paper
Using a coupled chemistry-climate model, we simulated the structural modulation of the Southern Annular Mode (SAM) caused by the change in ultraviolet radiation (UV) associated with the 11-year solar cycle. In an enhanced UV run, the SAM signal in late winter extended to the upper stratosphere and persisted until the following autumn. In a reduced UV run, the signal was mostly confined to the troposphere and disappeared very quickly during the following summer. This greater persistence in an enhanced UV run is connected to the formation of an ozone anomaly in the polar lower stratosphere, produced by the modulation of the Brewer-Dobson circulation in late winter.
Kuroda Yuhji
Shibata Kiyotaka
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