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Browsing by Author "Engelbrecht, FA"

Now showing items 8-27 of 31

Can intraseasonal to decadal forecasts benefit from from consideration of lunar forcing?

Author: Malherbe, Johan ; Landman, WA ; Engelbrecht, FA Date: Oct 2014 A possible forcing mechanism for intra-seasonal rainfall distribution to bi-decadal climate variability is explored. The atmospheric response to external forcing is demonstrated at a daily and annual time scale by noting variation in the ... Read more
Climate change and potato production in contrasting South African agro-ecosystems 1. Effects on land and water use efficiencies

Author: Haverkort, AJ ; Franke, AC ; Engelbrecht, FA ; Steyn, JM Date: Mar 2013 Explorations of the impact of climate change on potential potato yields were obtained by downscaling the projections of six different coupled climate models to high spatial resolution over southern Africa. The simulations of daily maximum and ... Read more
Downscaled climate change projections over northeastern South Africa: Implications for streamflow

Author: Mkhwanazi, M ; Landman, WA ; Engelbrecht, FA ; Olivier, C Date: Sep 2015 The study assesses the impacts of anthropogenic forcing on seasonal streamflows over northeastern South Africa by using both dynamically and statistically downscaled multi-decadal climate change projections. The statistical model approach is ... Read more
High-resolution model-projected changes in mid-tropospheric closed-lows and extreme rainfall events over southern Africa

Author: Engelbrecht, CJ ; Engelbrecht, FA ; Dyson, LL Date: Jan 2012 Mid-tropospheric closed-lows (cold-core cut-off lows and warm-core tropical lows) are important rain producing weather systems for the southern Africa region. Over South Africa, most wide-spread flood events are caused by these systems. It ... Read more
Impacts of convection schemes on simulating tropical-temperate troughs over southern Africa

Author: Tozuka, T ; Abiodun, BJ ; Engelbrecht, FA Date: Mar 2013 This study examines southern African summer rainfall and tropical temperate troughs (TTTs) simulated with three versions of an atmospheric general circulation model differing only in the convection scheme. All three versions provide realistic ... Read more
Implementing integrated catchment management in the Limpopo River Basin Phase 1: Situational assessment

Author: Mwenge Kahinda, Jean-Marc ; Kapangaziwiri, Evison ; Engelbrecht, FA ; Meissner, Richard ; Ashton, PJ Date: Oct 2012 A situational assessment of De Beers’ mining operations within a water-stressed area, and close to an ecologically sensitive area, offers useful insights for the development of specific interventions in the areas surrounding their mining ... Read more
Implementing Integrated Catchment Management in the upper Limpopo River basin: A situational assessment

Author: Mwenge Kahinda, Jean-Marc ; Meissner, Richard ; Engelbrecht, FA Date: Oct 2015 A three-phase study was initiated as a way to promote Integrated Catchment Management approaches in the Limpopo River basin. This paper presents the situational assessment, which should enable De Beers to understand how their Venetia Mine ... Read more
The IPCC assessment report six working group 1 report and southern Africa: Reasons to take action

Author: Engelbrecht, FA ; Monteiro, Pedro MS Date: Nov 2021 The release of the Intergovernmental Panel on Climate Change (IPCC) Assessment Report Six (AR6) Working Group I (WG1) report in August 2021 brought to completion what is arguably the most thorough and scrutinised assessment of climate knowledge ... Read more
Last Glacial Maximum simulations over southern Africa using a variable-resolution global model: synoptic-scale verification

Author: Nkoana, R ; Engelbrecht, FA ; Marean, CW Date: Sep 2015 Reconstructing the glacial maximum climates of the Cape south coast region of South Africa is important within the context of understanding the evolution of modern humans in this region. Simulating the Last Glacial Maximum (LGM) climate was ... Read more
Multi-scale climate modelling over Southern Africa using a variable-resolution global model

Author: Engelbrecht, FA ; Landman, WA ; Engelbrecht, CJ ; Landman, S ; Bopape, Mary-Jane M ; Roux, B ; McGregor, JL Date: Dec 2011 Evidence is provided of the successful application of a single atmospheric model code at time scales ranging from short-range weather forecasting through to projections of future climate change, and at spatial scales that vary from relatively ... Read more
Multi-scale climate modelling over Southern Africa using a variable-resolution global model

Author: Engelbrecht, FA ; Landman, WA ; Engelbrecht, CJ ; Landman, S ; Bopape, Mary-Jane M ; Roux, B ; McGregor, JL ; Thatcher, M Date: Dec 2011 Examples are provided how a single atmospheric model can be applied across a range of time and spatial scales. Read more
Natural hazards in a changing world: a case for ecosystem-based management

Author: Nel, JL ; Le Maitre, David C ; Nel, DC ; Reyers, B ; Archibald, S ; Van Wilgen, BW ; Forsyth, GG ; Theron, AK ; O'Farrell, Patrick J ; Mwenge Kahinda, Jean-Marc ; Engelbrecht, FA ; Kapangaziwiri, Evison ; Van Niekerk, Lara ; Barwell, L Date: May 2014 Communities worldwide are increasingly affected by natural hazards such as floods, droughts, wildfires and storm-waves. However, the causes of these increases remain underexplored, often attributed to climate changes or changes in the patterns ... Read more
The potential value of seasonal forecasts in a changing climate

Author: Winsemius, HC ; Dutra, E ; Engelbrecht, FA ; Archer, Emma RM ; Wetterhall, F ; Pappenberger, F ; Werner, MGF Date: Dec 2013 Subsistence farming in Southern Africa is vulnerable to extreme weather conditions. The yield of rain-fed agriculture depends largely on rainfall-related factors such as total seasonal rainfall, anomalous onsets and lengths of the rainy season ... Read more
Projected changes in tropical cyclone climatology and landfall in the Southwest Indian Ocean region under enhanced anthropogenic forcing

Author: Malherbe, Johan ; Engelbrecht, FA ; Landman, WA Date: Dec 2012 The conformal-cubic atmospheric model, a variable-resolution global model, is applied at high spatial resolution to perform simulations of present-day and future climate over southern Africa and over the Southwest Indian Ocean. The model is ... Read more
The relative contribution of synoptic types to rainfall over the Cape south coast region

Author: Engelbrecht, CJ ; Landman, WA ; Engelbrecht, FA Date: Sep 2013 A synoptic decomposition of rainfall over the Cape south coast region for the period 1979-2011 is presented. This decomposition is achieved by considering the average daily low-level circulation to develop a synoptic climatology, using a Self ... Read more
Response of the Southern Annular Mode to tidal forcing and the bidecadal rainfall cycle over subtropical southern Africa

Author: Malherbe, Johan ; Engelbrecht, FA ; Landman, WA Date: Mar 2014 Synoptic weather data and rainfall records are used to support previous suggestions that the decadal-scale cycle in certain climate records may be attributed to the modulation in tidal forcing related to the 18.6 year lunar nodal cycle. The ... Read more
The self-organizing map, a new approach to apprehend the Madden–Julian Oscillation influence on the intraseasonal variability of rainfall in the southern African region

Author: Oettli, P ; Tozuka, T ; Izumo, T ; Engelbrecht, FA ; Yamagata, T Date: Nov 2013 The Madden–Julian Oscillation (MJO) is the major mode of intraseasonal variability (30–60 days) in the tropics, having large rainfall impacts globally, and possibly on southern Africa. However, the latter impact is not well understood and ... Read more
A short-range multi-model ensemble weather prediction system for South Africa

Author: Landman, S ; Engelbrecht, FA ; Engelbrecht, CJ ; Landman, WA ; Dyson, L Date: Sep 2010 The objective of this paper is to present the temporal and spatial description of precipitation forecast skill over South Africa from an ensemble of multiple model runs. Numerical forecasts from an experimental short-range multi-model ensemble ... Read more
A short-range weather prediction system for South Africa based on a multi-model approach

Author: Landman, S ; Engelbrecht, FA ; Engelbrecht, CJ ; Dyson, LL ; Landman, WA Date: Oct 2012 Predicting the location and timing of rainfall events has important social and economic impacts. It is also important to have the ability to predict the amount of rainfall accurately. At many operational centres, such as the South African ... Read more
Simulating suppressed and active convection periods during TOGA COARE

Author: Bopape, Mary-Jane M ; Engelbrecht, FA ; Randall, DA ; Landman, WA Date: Sep 2013 The two-dimensional Non-hydrostatic s-coordinate Model (NSM) is used to simulate two twelve day periods and an eight day period observed during the Tropical Oceans Global Atmosphere Coupled Ocean-Atmosphere Response Experiment (TOGA COARE). ... Read more

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