Vertical ozone distribution over southern Africa and adjacent oceans during SAFARI-92

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dc.contributor.authorDiab, R. D.
dc.contributor.authorThompson, Anne M.
dc.contributor.authorZunckel, M.
dc.contributor.authorCoetzee, G. J. R.
dc.contributor.authorCombrink, J.
dc.contributor.authorBodeker, G. E.
dc.contributor.authorFishman, J.
dc.contributor.authorSokolic, F.
dc.contributor.authorMcNamara, D. P.
dc.contributor.authorArcher, C. B.
dc.contributor.authorNganga, D.
dc.date.accessioned2024-07-26T16:36:00Z
dc.date.available2024-07-26T16:36:00Z
dc.date.issued1996-10-01
dc.description.abstractA set of four ozonesonde stations located at Ascension Island, Brazzaville, Okaukuejo, and Irene, operational during the TRACE A and SAFARI-92 experiments has provided an opportunity to investigate the vertical distribution of ozone over southern Africa and adjacent oceans. All stations display a springtime maximum in tropospheric ozone. Enhanced tropospheric ozone, which occurs between June and September at Brazzaville and between July and October at Ascension Island, is linked to dry season biomass burning. The influence of tropical biomass burning is delayed until September at Okaukuejo when a sharp increase in tropospheric ozone is experienced. The biomass burning influence at Irene is less because of its more southerly location. A general tropospheric enhancement is observed at all stations. It is manifest as an enriched layer in the upper troposphere at Okaukuejo (9–12 km) and Brazzaville (11–14 km) and in the lower troposphere (2–8 km) at Ascension Island. At Ascension Island lower tropospheric ozone values are about 20 parts per billion by volume greater than elsewhere and the tropospheric component here accounts for about 18% of the total column ozone. A series of tethersonde soundings conducted at hourly intervals at Okaukuejo revealed ozone to be well mixed in the lower boundary layer during the day, but to display marked vertical stratification at night.
dc.description.sponsorshipAcknowledgments are due to the Department of Environment Affairs and the Foundation for Research Development, both of Pretoria, for providing funding which enabled the South African team to participate in SAFARI-92. The South African Weather Bureau provided the equipment for the ozonesonde station which was operated at Okaukuejo during SAFARI-92. NASA provided funding for consumables at Okaukuejo and for additional launches at Irene. Students of the Universities of Natal and Virginia and staff of the CSIR, Pretoria, are thanked for their assistance in the field. We also wish to acknowledge the Etosha Ecological Research Institute for use of their facilities whilst in the field. A. Thompson is grateful for support from the NASA Tropospheric Chemistry and Atmospheric Chemical Modeling and Analysis Programs and the U.S. Environmental Protection Agency (DW 80935678). The University of Natal Student Visiting Lecturers' Trust Fund facilitated collaboration on the manuscript.
dc.description.urihttps://onlinelibrary.wiley.com/doi/abs/10.1029/96JD01267
dc.format.extent11 pages
dc.genrejournal articles
dc.identifierdoi:10.13016/m2bqgd-lqbs
dc.identifier.citationDiab, R. D., A. M. Thompson, M. Zunckel, G. J. R. Coetzee, J. Combrink, G. E. Bodeker, J. Fishman, et al. “Vertical Ozone Distribution over Southern Africa and Adjacent Oceans during SAFARI-92.” Journal of Geophysical Research: Atmospheres 101, no. D19 (1996): 23823–33. https://doi.org/10.1029/96JD01267.
dc.identifier.urihttps://doi.org/10.1029/96JD01267
dc.identifier.urihttp://hdl.handle.net/11603/35157
dc.language.isoen_US
dc.publisherAGU
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC GESTAR II
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
dc.rightsPublic Domain
dc.rights.urihttps://creativecommons.org/publicdomain/mark/1.0/
dc.titleVertical ozone distribution over southern Africa and adjacent oceans during SAFARI-92
dc.typeText
dcterms.creatorhttps://orcid.org/0000-0002-7829-0920

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