Browsing Research Articles (Geography, Geoinformatics and Meteorology) by UP Author "Van Heerden, Johan"

Browsing Research Articles (Geography, Geoinformatics and Meteorology) by UP Author "Van Heerden, Johan"

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  • Dyson, Liesl L.; Van Heerden, Johan; Sumner, P.D. (Paul) (Wiley, 2015-01)
    Irene weather office sounding data are considered a proximity sounding for the Gauteng province of South Africa. Sounding-derived parameters are analysed for 35 austral summers from 1977 to 2012. The goal of this study ...
  • De Villiers, Michael P.; Van Heerden, Johan (Wiley, 2001)
    Clear air turbulence (CAT) at high altitude remains a hazard to aviation which can result in passenger injury and aircraft damage. Two limited surveys of CAT events over South Africa, 1993-1995 (inclusive) and 1998, are ...
  • De Villiers, Michael P.; Van Heerden, Johan (Wiley, 2007-12)
    Estimates have been made that, annually, up to about two billion tons of dust are carried up into the atmosphere, mainly by dust storms. One dust storm can lift and deposit more than 200 tons of dust (Griffin et ...
  • Klemm, Otto; Schemenauer, Robert S.; Lummerich, Anne; Cereceda, Pilar; Marzol, Victoria; Corell, David; Van Heerden, Johan; Reinhard, Dirk; Gherezghiher, Tseggai; Olivier, Jana; Osses, Pablo; Sarsour, Jamal; Frost, Ernst; Estrela, Maria J.; Valiente, Jose A.; Fessehaye, Gebregiorgis Mussie (Springer, 2012-05)
    The collection of fog water is a simple and sustainable technology to obtain fresh water for afforestation, gardening, and as a drinking water source for human and animal consumption. In regions where fresh water ...
  • De Villiers, Michael, P.; Van Heerden, Johan (Wiley, 2007-08)
    Fog that reduces visibility to the point where aircraft have to divert to another airport is not uncommon at Abu Dhabi International Airport (ADIA) in the United Arab Emirates (UAE). Over the period 1982 to 2003, ...