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Dynamical seasonal climate prediction using an ocean-atmosphere coupled climate model developed in partnership between South Africa and the IRI

Author: Beraki, Asmerom F ; De Witt, DG ; Landman, WA ; Olivier, C Date: Feb 2014 The recent increase in availability of high-performance computing (HPC) resources in South Africa allowed the development of an ocean–atmosphere coupled general circulation model (OAGCM). The ECHAM4.5-South African Weather Service (SAWS) ... Read more
Dynamical seasonal prediction of Southern African summer precipitation

Author: Yuan, C ; Tozuka, T ; Landman, WA ; Yamagata, T Date: 2014 Prediction skill for southern African (16°–33°E, 22°–35°S) summer precipitation in the Scale Interaction Experiment-Frontier coupled model is assessed for the period of 1982–2008. Using three different observation datasets, deterministic ... Read more
ENSO and implications on rainfall characteristics with reference to maize production in the Free State Province of South Africa

Author: Moeletsi, ME ; Walker, S ; Landman, WA Date: Aug 2011 El Niño-Southern Oscillation (ENSO) plays an important role in the inter-annual variability of rainfall in most parts of southern Africa. The effects of ENSO on the rainy season characteristics and possible impacts on rain-fed maize production ... Read more
ENSO forecasts in South Africa

Author: Landman, WA ; Beraki, Asmerom F Date: Nov 2015 The SST prediction systems currently being used at the Council for Scientific and Industrial Research (CSIR) and the South African Weather Service (SAWS) are presented. In particular, the skill of these systems to predict Niño3.4 SST and how ... Read more
Impact of ENSO events on the Kruger National Park’s vegetation

Author: Wessels, Konrad J ; Dwyer, PC Date: 2011 The El Niño Southern Oscillation (ENSO) is a global coupled ocean-atmosphere phenomenon that is a primary driver of inter-annual variability in the rainfall and consequently the vegetation production of southern African rangelands. Evidence ... Read more
Impact of lower stratospheric ozone on seasonal prediction systems

Author: Mathole, K ; Ndarana, T ; Beraki, Asmerom F ; Landman, WA Date: 2014 We conducted a comparison of trends in lower stratospheric temperatures and summer zonal wind fields based on 27 years of reanalysis data and output from hindcast simulations using a coupled ocean atmospheric general circulation model (OAGCM). ... Read more
Multi-model forecast skill for mid-summer rainfall over southern Africa

Author: Landman, WA ; Beraki, Asmerom F Date: Feb 2012 Southern African December-January-February (DJF) probabilistic rainfall forecast skill is assessed over a 22-year retroactive test period (1980/1981 to 2001/2002) by considering multi-model ensembles consisting of downscaled forecasts from ... Read more
Ranking seasonal rainfall forecast skill of emerging and developing economies

Author: Landman, WA ; Barnston, AG ; Vogel, C Date: Sep 2015 Some of the biggest emerging markets economies include countries in South America, Asia and Africa. In the global south, political and developmental similarities (e.g. climate variability occurring in conjunction with marked developmental ... Read more
Recurrent daily rainfall patterns over South Africa and associated dynamics during the core of the austral summer

Author: Cretat, J ; Richard, Y ; Pohl, B ; Rouault, Marjolaine J ; Reason, C ; Fauchereau, N Date: Dec 2010 This paper investigates the influence of some modes of climate variability on the spatio-temporal rainfall variability over South Africa during the core of the rainy season, December to February (DJF). All analyses are based directly on the ... Read more
Relationships between the Antarctic oscillation, the Madden-Julian oscillation, and ENSO, and consequences for rainfall analysis

Author: Pohl, B ; Fauchereau, N ; Reason, CJC ; Rouault, Marjolaine J Date: Jan 2010 The Antarctic Oscillation (AAO) is the leading mode of atmospheric variability in the Southern Hemisphere mid- and high latitudes (south of 20°S). In this paper, the authors examine its statistical relationships with the major tropical climate ... Read more

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Browsing by Subject "ENSO"

Browsing by Subject "ENSO"

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