Intraseasonal variations of the tropical total ozone and their connection to the Madden-Julian Oscillation

Details Intraseasonal variations of the tropical total ozone and their connection to the Madden-Julian Oscillation Intraseasonal variations of the tropical total ozone and their connection to the Madden-Julian Oscillation

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3408704t&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 8, CiteID L08704

Physics

12

Atmospheric Composition And Structure: Middle Atmosphere: Constituent Transport And Chemistry (3334), Biogeosciences: Climate Dynamics (1620), Biogeosciences: Restoration, Global Change: Climate Variability (1635, 3305, 3309, 4215, 4513)

Scientific paper

We investigate the intraseasonal (30-90 day) variations in satellite-observed tropical total ozone (O3) and their connection to the Madden-Julian Oscillation (MJO). Tropical total O3 intraseasonal variations are large (~+/-10 DU) and comparable to those in annual and interannual time scales. These O3 anomalies are mainly evident in the subtropics over the Pacific and eastern; hemisphere and propagate slowly eastward (~5 m s-1). The subtropical negative (positive) O3 anomalies are typically collocated with the subtropical upper troposphere anticyclones (cyclones) generated by equatorial MJO convection and flank or lie to the west of the equatorial enhanced (suppressed) MJO convection. The subtropical O3 are anti-correlated with geopotential height anomalies near the tropopause and thus mainly associated with the O3 variability in the stratosphere rather the troposphere. Over the equatorial regions, total O3 anomalies are small.

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