Author:De Moor, IJ; Bruton, MNDate:1988This report serves as an introduction to the problem of alien and translocated aquatic animals in southern Africa is given followed by checklists of the different species which have been introduced into or translocated within the subcontinent. ...Read more
Author:Tesfaye, M; Sivakumar, V; Mengistu, G; Botai, J; Sharma, Ameeth; Bollig, C; Rautenbach, CJdWHDate:2010In this paper, the tropospheric aerosol load morphological classification and its impact on temporal variation of visibility are investigated using a continuous 23-hour single channel CSIR-NLC mobile LIDAR backscatter measurement. The trajectory ...Read more
Author:Callaghan, BGDate:1991Atmospheric corrosion is one the most widespread causes of metal and alloy degradation known. We only have to look at the corrosion of structural steelwork in buildings, bridges and other forms of construction to recognize the enormous wastage ...Read more
Author:Callaghan, BGDate:1991Atmospheric corrosion is one of the most widespread causes of metal and alloy degradation known. We only have to look at the corrosion of structural steelwook in buildings, bridges and other forms of construction to recognise the enormous ...Read morecb
Author:Feig, Gregor T; Mudau, Tami E; Piketh, S; Labuschagne, CDate:Oct 2016The concentrations of atmospheric methane have an important impact on the global climate system and are important in the production of tropospheric ozone as it acts as an ozone precursor. The ambient concentrations of methane have increased ...Read more
Author:Landman, WA; Engelbrecht, FDate:Mar 2010The basic concepts of models and how they are used for weather and climate projection are presented.Read more
Author:Landman, WA; Engelbrecht, F; Park, R; Bopape, Mary-Jane M; Lötter, DDate:01 Sep 2010Daily weather forecasts are skilful and are initial-value problems, while at the seasonal time scale, slowly varying surface forcing, for example from the tropical Pacific Ocean, can induce atmospheric anomalies that are sufficiently long-lasting ...Read more
Author:Landman, WA; Engelbrecht, FA; McGregor, JL; van der Merwe, JHDate:Oct 2014Three aspects of seasonal forecast modelling when using an atmospheric general circulation model (AGCM) are presented in this paper. The first aspect deals with the verification of simulations created by forcing the AGCM at its lower boundary ...Read more
Author:Tyson, PD; Kruger, FJ; Louw, CWDate:Apr 1988This report is a review of available information on the dispersion climatology, the degree of atmospheric pollution and the various impacts of that pollution on man and environment in the Eastern Transvaal Highveld (ETH) and adjacent regions. ...Read more
Author:Olbrich, K; Skoroszewski, R; Van Tienhoven, MDate:Mar 1996This paper aims to address and integrate the three main components of the air pollution problem in South Africa: assessment and measurement of air quality, evaluation of the effects of poor air quality, and management of air quality.Read more
Author:Sivakumar, V; Delmas, RDate:Sep 2009In the present context of global changes, atmospheric and climatic research should be more organized in the framework of international collaborations and research networks. In this paper, researchers provide details about the instrument to ...Read more
Author:Edholm, JM; Swart, S; Plessis, Marcel D; Nicholson, Sarah-AnneDate:Aug 2022Atmospheric rivers (ARs) dominate moisture transport globally; however, it is unknown what impact ARs have on surface ocean buoyancy. This study explores the surface buoyancy gained by ARs using high-resolution surface observations from a ...Read more
Author:Sithole, Happy M; Ngoepe, PE; Wright, KDate:Oct 2003Interatomic potential parameters have been derived at simulated temperatures of 0 K and 300 K to model pyrite FeS2. The predicted pyrite structures are within 1% of those determined experimentally, while the calculated bulk modulus is within ...Read more
Author:Ngoepe, PE; Ntoahae, PS; Mangwejane, SS; Sithole, Happy M; Parker, SC; Wright, KV; De Leeuw, NHDate:Sep 2005The authors present the results of atomistic simulations using derived interatomic potentials for the pyrite-structured metal chalcogenides FeS2, PtSb2 and PtAs2. Structural and elastic constants were calculated and compared with experimental ...Read more
Author:Mkhonto, D; Ngoepe, PE; Cooper, TG; de Leeuw, NHDate:Apr 2006Apatite coexist in mineral ore deposits with other calcium-bearing minerals such as calcium phosphate, calcium carbonate, calcium fluorite. Apatite need to be separated from these by flotation process. Surfactant molecules with long hydrophobic ...Read more
Author:Ramotsoela, DT; Hancke, GP; Abu-Mahfouz, Adnan MIDate:Apr 2019The threat to critical water system infrastructure has increased in recent years as is evident from the increasing number of reported attacks against these systems. Preventative security mechanisms are often not enough to keep attackers out ...Read more
Author:Turpie, DWFDate:Feb 1978The length characteristics of wool tops which had been produced from thirty different wools from a range of breeds were measured on the Almeter and compared with results obtained by the single fibre length method.Read more