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| Titel |
Space-borne observations link the tropical atlantic ozone maximum and paradox to lightning |
| VerfasserIn |
G. S. Jenkins, J.-H. Ryu |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 4, no. 2 ; Nr. 4, no. 2 (2004-02-25), S.361-375 |
| Datensatznummer |
250001596
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| Publikation (Nr.) |
 copernicus.org/acp-4-361-2004.pdf |
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| Zusammenfassung |
The potential enhancement of tropospheric column ozone values over the
Tropical Atlantic Ocean on a seasonal basis by lightning is investigated using
satellite derived ozone data, TRMM lightning data, ozonesonde data and NCEP
reanalysis during 1998-2001. Our results show that the number of lightning
flashes in Africa and South America reach a maximum during September,
October and November (SON). The spatial patterns of winds in combination with
lightning from West Africa, Central Africa and South America is likely responsible
for enriching middle/upper troposphere ozone over the Tropical South Atlantic
during SON. Moreover, lightning flashes are high in the hemisphere opposite to
biomass burning during December, January, and February (DJF) and June, July
and August (JJA). This pattern leads to an enrichment of ozone in the
middle/upper troposphere in the Southern Hemisphere Tropics during DJF and
the Northern Hemisphere Tropics during JJA. During JJA the largest numbers of
lightning flashes are observed in West Africa, enriching tropospheric column
ozone to the north of 5 S in the absence of biomass burning. During DJF,
lightning is concentrated in South America and Central Africa enriching
tropospheric column ozone south of the Equator in the absence of biomass
burning. |
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