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

R. B. Chatfield, H. Guan, Anne Mee Thompson, J. C. Witte

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

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.

Original languageEnglish (US)
JournalGeophysical Research Letters
Volume31
Issue number6
StatePublished - Mar 28 2004

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lofting
air pollution
Indian Ocean
ozone
atmospheric pollution
geographic distribution
ozonesondes
sondes
cumulonimbus
venting
ozonesonde
lightning
Southern Hemisphere
sounding
pollution
combustion
trajectory
trajectories
estimates
tropospheric ozone

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

Chatfield, R. B. ; Guan, H. ; Thompson, Anne Mee ; Witte, J. C. / Convective lofting links Indian Ocean air pollution to paradoxical South Atlantic ozone maxima. In: Geophysical Research Letters. 2004 ; Vol. 31, No. 6.
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Convective lofting links Indian Ocean air pollution to paradoxical South Atlantic ozone maxima. / Chatfield, R. B.; Guan, H.; Thompson, Anne Mee; Witte, J. C.

In: Geophysical Research Letters, Vol. 31, No. 6, 28.03.2004.

Research output: Contribution to journalArticle

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