Convective lofting links Indian Ocean air pollution to paradoxical South Atlantic ozone maxima

Details Convective lofting links Indian Ocean air pollution to paradoxical South Atlantic ozone maxima Convective lofting links Indian Ocean air pollution to paradoxical South Atlantic ozone maxima

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3106103c&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 6, CiteID L06103

Computer Science

Sound

7

Atmospheric Composition And Structure: Constituent Sources And Sinks, Atmospheric Composition And Structure: Troposphere-Composition And Chemistry, Meteorology And Atmospheric Dynamics: Tropical Meteorology, Information Related To Geographic Region: Indian Ocean

Scientific paper

We describe a broad resolution of the ``Atlantic Parado'' concerning the seasonal and geographic distribution of tropical tropospheric ozone. We highlight periods of significant maximum tropospheric O3 for Jan.-April, 1999, exploiting satellite estimates and SHADOZ (Southern Hemisphere Additional Ozonesondes). Trajectory analyses connecting sondes and Total Tropospheric Ozone (TTO) maps suggest a complex influence from the Indian Ocean: beginning with mixed combustion sources, then low level transport, cumulonimbus venting, possible stratospheric input, and finally high-level transport to the west, with possible mixing over Africa. For the Jan.-March highest column-O3 periods in the Atlantic, distinct sounding peaks trace to specific NO sources, especially lightning, while in the same episodes, recurring every 20-50 days, more diffuse buildups of Indian-to-Atlantic pollution make important contributions.

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