Mots-clés
Afrique Afrique australe Couvert végétal Domaine aride Dune Désert Eolien Evapotranspiration potentielle Indice Kalahari Précipitation Sable Transport éolien Variabilité climatique Vent Aeolian features Aeolian transport Africa Arid area Climatic variability Desert Dune Index Plant canopy Potential evapotranspiration Precipitation Sand Southern Africa WindDunefield activity and interactions with climatic variability in the southwest Kalahari Desert
Auteur(s) et Affiliation(s)
BULLARD, J.E.
Sheffield Centre for International Drylands Research, Dept. of Geography, University of Sheffield, Sheffield, Royaume-Uni
Description :
An analysis is undertaken of the temporal variability of climatic parameters that influence dunefield aeolian activity. Data from 7 meteorological stations in the southwestern Kalahari Desert are used, spanning the period 1960-1992. Erosivity is considered through analysis of wind data, and erodibility through analysis of precipitation and potential evapotranspiration, which together influence dune surface plant growth. The data are integrated using Lancaster's mobility index which provides a measure of potential dune surface sand transport.
Type de document :
Article de périodique
Source :
Earth surface processes and landforms, issn : 0197-9337, 1997, vol. 22, n°. 2, p. 165-174, Collation : Illustration, Références bibliographiques : 30 ref.
Date :
1997
Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)