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Urban and Rural Ozone Pollution Over Lusaka (Zambia, 15.5S, 25E) During SAFARI-2000 (September 2000)In early September, throughout south central Africa, seasonal clearing of dry vegetation and the production of charcoal for cooking leads to intense smoke haze and ozone formation. Ozone soundings made over Lusaka during a six-day period in early September 2000 recorded layers of high ozone (greater than 125 ppbv at 5 km) during two stagnant periods, interspersed by a frontal passage that reduced boundary layer ozone by 30 percent. Smoke aerosol column variations aloft and total ozone were monitored by a sun photometer. During the 6-day measurement period, surface ozone concentrations ranged from 50-95 ppbv and integrated tropospheric ozone from the soundings was 39- 54 Dobson Units (note 1.3 km elevation at the launch site). High ozone concentrations above the mixed and inversion layers were advected from rural burning regions in western Zambia where SAFARI aircraft and ground-based instruments observed intense biomass fires and elevated aerosol and trace gas amounts. TOMS tropospheric ozone and smoke aerosols products show the distribution of biomass burning and associated pollution throughout southern Africa in September 2000. Animations of satellite images and trajectories confirm pollutant recirculation over south central African fires, exit of ozone from Mozambique and Tanzania to the Indian Ocean and the characteristic buildup of tropospheric ozone over the Atlantic from western African outflow.
Document ID
20020023249
Document Type
Conference Paper
Authors
Thompson, Anne M. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Herman, J. R. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Witte, J. C. (Science Systems and Applications, Inc. Greenbelt, MD United States)
Phahlane, A. (South African Weather Bureau Pretoria, South Africa)
Coetzee, G. J. R. (South African Weather Bureau Pretoria, South Africa)
Mukula, C. (Zambian Meteorological Dept. Lusaka Zambia)
Hudson, R. D. (Maryland Univ. College Park, MD United States)
Frolov, A. D. (Maryland Univ. College Park, MD United States)
Bhartia, P. K.
Date Acquired
August 20, 2013
Publication Date
January 1, 2001
Subject Category
Environment Pollution
Meeting Information
2001 Fall AGU Meeting(San Francisco, CA)
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.