Studying the Atmosphere over Africa using Astronomical Data: I - Extinction Measurements

Details Studying the Atmosphere over Africa using Astronomical Data: I - Extinction Measurements Studying the Atmosphere over Africa using Astronomical Data: I - Extinction Measurements

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000afrsk...5...10w&link_type=abstract

African Skies, Volume 5, p.10

Astronomy and Astrophysics

Astronomy

Scientific paper

The article highlights the potential uses of astronomical extinction measurements in the study of the transport and concentration of aerosols, which in turn have an effect on the global radiation balance, as well as cloud formation. Some examples of cases where astronomical extinction measurements have facilitated atmospheric research in Africa are presented, these being (a) the properties of Saharan dust and its transportation to the Canary Islands; (b) the Pinatubo ash-cloud and its evolution; (c) the brown haze in Cape Town; and (d) the passage of pyrogenic aerosol clouds over Sutherland. L'article met l'accent sur les utilisations potentielles des mesures de l'extinction astronomique dans l'étude du transport et de la concentration des aérosols qui, à leur tour, ont un effet sur le bilan global des radiations comme sur la formation des nuages. Quelques exemples de cas oú les mesures d'extinction astronomique ont facilité la recherche atmosphérique en Afrique, sont présentés: (a) les propriétés de la poussière du Sahara et son transport vers les Iles des Canaries, (b) le nuage de cendres du Pinatubo et son évolution, (c) la brume foncée à Cape Town, et (d) le passage des nuages d'aérosols pyrogéniques au-dessus du Sutherland en Afrique du Sud.

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