Intra-annual relationships between polar ozone and the SAM

Details Intra-annual relationships between polar ozone and the SAM Intra-annual relationships between polar ozone and the SAM

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3604707f&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 4, CiteID L04707

Physics

5

Atmospheric Processes: Stratosphere/Troposphere Interactions, Atmospheric Processes: Climate Change And Variability (1616, 1635, 3309, 4215, 4513), Global Change: Climate Dynamics (0429, 3309), Global Change: Global Climate Models (3337, 4928)

Scientific paper

Observed co-variations between polar total column ozone and the Southern Hemisphere Annular Mode (SAM) during 1962-2004 are presented and evaluated in a chemistry-climate model (CCM). Results show that austral spring total column ozone variability at South Pole is significantly related to the SAM, perhaps up to four months later; this relationship is only seen in simulations that include ozone depletion. The austral spring SAM also is linked to following late spring - early summer total column ozone over the polar cap, since both respond to the wave-driving of the stratosphere. Overall, the CCM captures many of the observed ozone-SAM links, but over-predicts the relationship between spring ozone and austral summer SAM, as a consequence of the delayed breakdown of the polar vortex in the CCM.

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