Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Master → Canada → Measurement and modelling of global solar radiation in a southern African savanna environment

Simon Fraser University (2002)

Measurement and modelling of global solar radiation in a southern African savanna environment

Nasitwitwi, Mungandi

Titre : Measurement and modelling of global solar radiation in a southern African savanna environment

Auteur : Nasitwitwi, Mungandi

Université de soutenance : Simon Fraser University (Canada)

Grade : Master of Science (MS) 2002

Résumé
An experiment to characterize global solar radiation regimes of the African savanna environment was conducted from April through December 2000 over a range of meteorological conditions at Lusaka, Zambia. Extraterrestrial solar radiation, global solar radiation and the clearness index all exhibited seasonality as a result of the annual north-south movement of the Hadley cell. Extraterrestrial solar radiation exhibited an annual cycle based on the solar zenith angle, with a minimum occurring in the Southern Hemisphere winter and a maximum in the Southern Hemisphere summer. A complex interplay of atmospheric controls resulted in diurnal, monthly and seasonal variability in all-sky global solar radiation and the clearness indices. Under subtropical anticyclones in the cool-dry season (April-July) and the hot-dry season (August-November), relatively cloudless sky conditions and low precipitable water enhanced the clearness indices

Présentation (Amicus)

Version intégrale

Page publiée le 23 mars 2015, mise à jour le 5 février 2018