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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Presence of an atmospheric oxalate source in the intertropical zone - its potential action in the atmosphere
Atmospheric Research, Volume 25, No. 5, Year 1990
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Description
Two series of aerosol collections were made at ground level in several sites in Ivory Coast, in January and June 1986. These two periods are respectively characteristic of the dry and rainy seasons in Western Africa. Oxalate-containing particles are detected with an average concentration of 99.5 ppt. only during the dry period. The dry season aerosol is composed of a mixture of materials produced by the Saharan terrigenous sources and burning vegetation. The oxalate is most likely produced by the combustion of vegetal biomass. The coincidence of the presence of oxalate in the dry season aerosol, and the ice-nucleating properties of this same aerosol shown by Bertrand (1977), suggests that the oxalate is in the form of calcium oxalate, which is an active ice nucleus at -7°C. We present this as a possible source of ice nuclei for the formation of the ice phase in the convective clouds. © 1990.
Authors & Co-Authors
Baudet, Jean G.R.
Cote D'ivoire, Abidjan
Fast
Lacaux, Jean Pierre
France, Toulouse
Université Toulouse Iii - Paul Sabatier
Bertrand, J. J.
Cote D'ivoire, Abidjan
Fast
Desalmand, F.
France, Palaiseau
Laboratoire de Météorologie Dynamique
Servant, Jean
France, Toulouse
Université Toulouse Iii - Paul Sabatier
Yoboué, Véronique
France, Toulouse
Université Toulouse Iii - Paul Sabatier
Statistics
Citations: 11
Authors: 6
Affiliations: 3
Identifiers
Doi:
10.1016/0169-8095(90)90029-C
ISSN:
01698095
Study Locations
Ivory Coast