Document


Title

Distribution of aerosols, ozone and carbon monoxide over southern Africa
Document Type: Journal Article
Author(s): G. A. Kirkman; S. J. Piketh; M. O. Andreae; H. J. Annegarn; G. Helas
Publication Year: 2000

Cataloging Information

Keyword(s):
  • aerosols
  • Africa
  • air quality
  • biomass burning
  • CO - carbon monoxide
  • fire management
  • forest management
  • gases
  • ozone
  • season of fire
  • smoke effects
  • smoke management
  • South Africa
  • wildfires
Region(s):
  • International
Record Maintained By:
Record Last Modified: September 19, 2018
FRAMES Record Number: 52229
Tall Timbers Record Number: 29301
TTRS Location Status: Not in file
TTRS Call Number: Available
TTRS Abstract Status: Fair use, Okay, Reproduced by permission

This bibliographic record was either created or modified by the Tall Timbers Research Station and Land Conservancy and is provided without charge to promote research and education in Fire Ecology. The E.V. Komarek Fire Ecology Database is the intellectual property of the Tall Timbers Research Station and Land Conservancy.

Description

Seasonal tropospheric distributions of ozone, carbon monoxide and aerosols and their relationship with sources over southern Africa are compared for two airborne sampling campaigns during southern hemisphere spring 1992 (SAFARI-92) and autumn 1994 (SAFARI-94). Average trace gas and aerosol concentrations from both campaigns are compared for equal spatial areas between 15ºE, 15ºS and 35ºE, 30ºS. This study presents a first estimate of air chemistry climatology over southern Africa for two seasons and uses trajectory analysis to identify possible sources of atmosphere trace species. Elevated chemical concentrations in the troposphere are attributed to two principal sources -- industrial emissions and biomass burning. Differences in southern African tropospheric chemistry are the result of seasonal variability in the frequency of fire emissions in the north and the permanence of industrial emissions in the southeast. Seasonal variation in trace gas and aerosol concentrations over this region is largely influenced by fire and regulated by dominant air flow patterns and strong stratification into layers of polluted and unpolluted air. The season-independent signal is shown to be that of industrial emissions that prevail throughout the year and determine a significant portion of the chemical conditions of the troposphere over the subcontinent.

Citation:
Kirkman, G. A., S. J. Piketh, M. O. Andreae, H. J. Annegarn, and G. Helas. 2000. Distribution of aerosols, ozone and carbon monoxide over southern Africa. South African Journal of Science, v. 96, no. 8, p. 423-431.