Browsing Natural and Agricultural Sciences by Supervisor "Landman, W.A. (Willem Adolf), 1964-"
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Browsing Natural and Agricultural Sciences by Supervisor "Landman, W.A. (Willem Adolf), 1964-"
Now showing items 1-19 of 19
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(University of Pretoria, 2014)This research has been conducted in order to develop a short-range ensemble numerical weather prediction system over southern Africa using the Conformal-Cubic Atmospheric Model (CCAM). An ensemble prediction system (EPS) ...
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(University of Pretoria, 2015)Climatologically, the Cape south coast is unique in the sense that it lacks the pronounced seasonality observed over the remainder of South Africa. Here, rainfall occurs all-year round, implying that rainfall-producing ...
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(University of Pretoria, 2021)Cut-off low (COL) pressure systems are critical weather systems which can result in resulting various severe weather events on South Africa. COLs are often associated with surface cyclones which can enhance weather-related ...
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(University of Pretoria, 2015)The predictive skill of seasonal forecast arises from the slowly evolving climate processes where the signature, that noticeably influence the mean state of weather conditions, mainly resides in the ocean. The interaction ...
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(University of Pretoria, 2016)Rangelands are extremely important for livestock grazing purposes in South Africa. Grazing should thus be regulated in order to conserve grass, shrubs and trees thereby ensuring sustainability of rangelands. In South Africa, ...
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(University of Pretoria, 2015)The main objective of this study is to determine whether human-forecaster at the main airports of South Africa add value to the raw numerical weather prediction model output when they provide forecast services to the ...
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(University of Pretoria, 2019)A Tropical Temperate Trough (TTT) is a type of weather system that links the tropics and the extra-tropics across southern Africa. TTT events have been studied statistically in detail, but very little research has been ...
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(University of Pretoria, 2016)Seasonal climate prediction of rainfall and temperature in South Africa (SA) during summer is mainly related to the variability of El Niño Southern Oscillation (ENSO) besides other forcings from local surrounding oceans. ...
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(University of Pretoria, 2006)Global Climate Models (GCMs) and Regional Climate Models (RCMs) represent the atmospheric processes that are nonlinear by nature and are therefore sensitive to small perturbations. The RCMs are provided time dependent ...
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(University of Pretoria, 2016)Aspects of seasonal forecast skill using global climate models (GCMs) are assessed over South Africa. The GCMs output is configured to predict low and high number of rainfall days exceeding predefined threshold values for ...
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(University of Pretoria, 2006-10-10)Empirical techniques are developed to adjust dynamic model forecasts on the seasonal time scale for southern African summer rainfall. The techniques, called perfect prognosis and model output statistics (MOS), are utilized ...
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(University of Pretoria, 2007-07-03)This study assesses the performance of an atmospheric GCM forced with persisted SSTs in simulating austral summer precipitation at smaller spatial (regional) scales. Two statistical recalibration techniques of differing ...
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(University of Pretoria, 2015)The Lake Kariba catchment area in southern Africa has one of the most variable climates of any major river basin, with an extreme range of conditions across the catchment and through time. The study characterized rainfall ...
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(University of Pretoria, 2009-12-08)Agricultural production is highly sensitive to climate and weather perturbations. Maize is the main crop cultivated in South Africa and production is predominantly rain-fed. South Africa’s climate, especially rainfall, is ...
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(University of Pretoria, 2010-10-25)Tropical cyclones claim a huge number of lives and cause substantial damage to property and crops in many regions each year. Southern Africa is no exception. This makes the process of forecasting tropical cyclones of great ...
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(University of Pretoria, 2013)Cloud Resolving Models use microphysics parameterisation schemes for the simulation of clouds. The thesis reports on the introduction of two single-moment Bulk Microphysics Parameterisation (BMP) schemes in the Nonhydrostatic ...
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(University of Pretoria, 2017)Heat waves are, amongst other weather hazards, projected to increase in frequency and intensity due to climate change. This increase has already been evident in parts of South Africa in the recent years. Their negative ...
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(University of Pretoria, 2013)The study considers the influence of tropical systems (cyclones, storms, depressions) from the Southwest Indian Ocean (SWIO) over the Limpopo River Basin and provides an outlook towards projected decadal scale variability ...
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(University of Pretoria, 2008)The South African Weather Service rainfall seasonal forecasts are verified for the period of January-February-March to October-November-December 1998-2004. These forecasts are compiled using different models from different ...
Now showing items 1-19 of 19