scholarly journals The Influence of Atmospheric Rivers over the South Atlantic on Winter Rainfall in South Africa

2018 ◽  
Vol 19 (1) ◽  
pp. 127-142 ◽  
Author(s):  
R. C. Blamey ◽  
A. M. Ramos ◽  
R. M. Trigo ◽  
R. Tomé ◽  
C. J. C. Reason
Keyword(s):  
South Africa ◽  
South African ◽  
Extreme Rainfall ◽  
Detection Algorithm ◽  
Winter Rainfall ◽  
Atmospheric Rivers ◽  
The North ◽  
Study Support ◽  
Topographic Barriers ◽  
High Topography

Abstract A climatology of atmospheric rivers (ARs) impinging on the west coast of South Africa (29°–34.5°S) during the austral winter months (April–September) was developed for the period 1979–2014 using an automated detection algorithm and two reanalysis products as input. The two products show relatively good agreement, with 10–15 persistent ARs (lasting 18 h or longer) occurring on average per winter and nearly two-thirds of these systems occurring poleward of 35°S. The relationship between persistent AR activity and winter rainfall is demonstrated using South African Weather Service rainfall data. Most stations positioned in areas of high topography contained the highest percentage of rainfall contributed by persistent ARs, whereas stations downwind, to the east of the major topographic barriers, had the lowest contributions. Extreme rainfall days in the region are also ranked by their magnitude and spatial extent. The results suggest that although persistent ARs are important contributors to heavy rainfall events, they are not necessarily a prerequisite. It is found that around 70% of the top 50 daily winter rainfall extremes in South Africa were in some way linked to ARs (both persistent and nonpersistent). Overall, the findings of this study support similar investigations on ARs in the North Atlantic and North Pacific.

scholarly journals Reflections on a field across time and space: the emergent medical and health humanities in South Africa

2018 ◽  
Vol 44 (4) ◽  
pp. 263-269 ◽  
Author(s):  
Victoria Jane Hume ◽  
Megan Wainwright
Keyword(s):  
South Africa ◽  
South African ◽  
Cross Cultural ◽  
The South ◽  
Health Humanities ◽  
Cultural Experience ◽  
The North ◽  
Qualitative Evidence ◽  
The Uk ◽  
Personal Reflections

In this paper, we draw on our own cross-cultural experience of engaging with different incarnations of the medical and health humanities (MHH) in the UK and South Africa to reflect on what is distinct and the same about MHH in these locations. MHH spaces, whether departments, programmes or networks, have espoused a common critique of biomedical dualism and reductionism, a celebration of qualitative evidence and the value of visual and performative arts for their research, therapeutic and transformative social potential. However, there have also been differences, and importantly a different ‘identity’ among some leading South African scholars and practitioners, who have felt that if MHH were to speak from the South as opposed to the North, they would say something quite different. We seek to contextualise our personal reflections on the development of the field in South Africa over recent years within wider debates about MHH in the context of South African academia and practice, drawing in part on interviews conducted by one of the authors with South African researchers and practitioners and our own reflections as ‘Northerners’ in the ‘South’.

scholarly journals Funksionele meertaligheid in Suid-Afrika: 'n onbereikbare ideaal?

Literator ◽  
1998 ◽  
Vol 19 (1) ◽  
pp. 35-50 ◽  
Author(s):  
M. Verhoef
Keyword(s):  
South Africa ◽  
South African ◽  
Mother Tongue ◽  
Final Report ◽  
North West ◽  
African Languages ◽  
The North ◽  
Mother Tongue Instruction ◽  
Education Act ◽  
Regional Languages

Functional multilingualism in South Africa: an unattainable ideal? Although much has been done on an official level to establish true multilingualism in South Africa, a tendency towards English monolingualism seems to exist in the country. The aim of this article is to describe the official stipulations in pursuit of multilingualism, as they appear in the Constitution (Act 108 of 1996), the School Act (Act 84 of 1996) and the final report of Langtag. In addition to the present demands, the article also responds to previous demands for multilingualism in the South African context, particularly as stated in the Bantu Education Act of 1953. It is argued that, because of the negative connotations associated with mother-tongue instruction in the past, contemporary mother-tongue instruction will also be contaminated. Apart from the theoretical investigation into multilingualism, the article reports on empirical research that has been done in this regard in the North West Province where the attitudes and perceptions of the school population towards the regional languages were measured. Although the subjects reacted positively to the official status granted to several South African languages, they expressed a preference for English as working language because of the access it gives to personal, economic and social development and empowerment. The article concludes with brief recommendations regarding language planning opportunities that derive from this situation.

scholarly journals Taxonomic notes on the Rhynchosia densiflora group (Phaseoleae, Fabaceae) in South Africa and its segregation from Rhynchosia section Arcyphyllum

Bothalia ◽  
2018 ◽  
Vol 48 (1) ◽  
Author(s):  
Thulisile P. Jaca ◽  
Annah N. Moteetee
Keyword(s):  
South Africa ◽  
South African ◽  
Field Trips ◽  
Herbarium Specimens ◽  
Petiole Length ◽  
Diagnostic Features ◽  
Anatomical Features ◽  
Distribution Maps ◽  
The North ◽  
Leaflet Shape

Background: Rhynchosia section Arcyphyllum is one of the five sections of Rhynchosia as currently circumscribed. Previous studies in South Africa placed two species of Rhynchosia in this section. Some authors treated the species as a group rather than a section, to avoid phytogeographical confusion because the section is based on the North American generic name Arcyphyllum.Objectives: To formally remove the South African taxa from section Arcyphyllum and to provide diagnostic features for these taxa, a key to the subspecies, distribution maps and an illustration of their morphological features.Methods: Observations were made on herbarium specimens housed at NH, NU and PRE. Several field trips were undertaken in search of Rhynchosia connata. Morphological and anatomical features were studied and measurements of characters recorded.Results: In South Africa, the section was until now represented by two species, Rhynchosia densiflora (subsp. chrysadenia) and R. connata. These were separated primarily on stem indumentum, stipule shape, petiole length, leaflet shape and apices. However, this study revealed that there are no clear discontinuities between the two taxa apart from the lobes of the uppermost calyx lip, which are connate more than halfway in R. connata and up to halfway in R. densiflora subsp. chrysadenia. Therefore, R. connata is here relegated to varietal level as R. densiflora subsp. chrysadenia var. connata (Baker f.) Jaca Moteetee.Conclusions: Two varieties of Rhynchosia densiflora subsp. chrysadenia occur in South Africa and are treated as part of the R. densiflora group instead of section Arcyphyllum.

A Taxonomic Revision of the Othonna bulbosa Group (Asteraceae: Senecioneae: Othonninae)

2019 ◽  
Vol 104 (4) ◽  
pp. 515-562 ◽  
Author(s):  
Simon L. Magoswana ◽  
James S. Boatwright ◽  
Anthony R. Magee ◽  
John C. Manning
Keyword(s):  
South Africa ◽  
South African ◽  
Geographical Distribution ◽  
Taxonomic Revision ◽  
Cape Floristic Region ◽  
The South ◽  
Winter Rainfall ◽  
African Species ◽  
Taxonomic Treatment ◽  
Rainfall Region

Othonna L. (Asteraceae: Senecioneae: Othonninae) is a genus of some 120 species concentrated in the Greater Cape Floristic Region (GCFR) of South Africa, with a few species extending into southern Namibia, Angola, and Zimbabwe. The South African species of Othonna were last revised more than a century ago, and many species, particularly from the southern African winter rainfall region, remain poorly understood. This study focused on the geophytic species comprising the O. bulbosa group, distinguished by their tuberous rootstock and annual, leafy, aerial stems. A comprehensive taxonomic treatment is presented, including descriptions, complete nomenclature and typification, illustrations, and geographical distribution. Twenty-five species are recognized, of which four are newly described (O. lilacina Magoswana & J. C. Manning, O. nigromontana Magoswana & J. C. Manning, O. revoluta Magoswana & J. C. Manning, and O. sinuata Magoswana & J. C. Manning), and 18 names are reduced to synonymy. The species differ in habit, shape and incision of foliage, capitulum type (radiate vs. disciform), number of involucral bracts, pappus length, and cypselae (myxogenic vs. nonmyxogenic). We place the species into four morphologically diagnosable series (series Heterophyllae Magoswana & J. C. Manning, series Disciformes Magoswana & J. C. Manning, series Perfoliatae Magoswana & J. C. Manning, and series Undulosae Magoswana & J. C. Manning) based on habit and capitulum type.

Max Yergan Encounters South Africa: Theological Perspectives On Race

2004 ◽  
Vol 34 (3) ◽  
pp. 235-265 ◽  
Author(s):  
David Henry Anthony
Keyword(s):  
South Africa ◽  
African American ◽  
South African ◽  
Southern Africa ◽  
Training School ◽  
Public Figure ◽  
Political Actors ◽  
Religious Traditions ◽  
Left Behind ◽  
The North

AbstractWhile scholarship on the missionary encounter with Southern Africa has grown ever more sophisticated over the last decade, with a few notable exceptions scholars have tended to ignore religious traditions other than those of the 'historic' European churches. This paper sheds light upon one such overlooked tradition, that of the African-American sojourner Max Yergan (1892-1975), who worked in South Africa between 1922 and 1936 under the auspices of the North American YMCA. While he is known generally as a public figure who subsequently exerted influence upon a surprisingly broad range of political actors and events in and beyond South Africa, little has been written about a body of texts that help to reveal the evolution of his social thought and practice in South Africa. For nearly fifteen years Yergan left behind a trail of writings (which hitherto have not been explored) in local and overseas publications, together with numerous rich caches of correspondence, and inspired reportage in YMCA, Student Christian Association (SCA), African training school and mission periodicals. Much of this work was religiously inspired, and theological or missiological in content. Representative examples of this oeuvre are here deployed to provide a sense of Yergan's worldview, its relationship to his South African mission and his later career outside of it.

Southern Africa Litigation Centre v. Minister of Justice and Constitutional Development (N. Gauteng High Ct., Pretoria)

2015 ◽  
Vol 54 (5) ◽  
pp. 927-944 ◽  
Author(s):  
John Dugard
Keyword(s):  
South Africa ◽  
South African ◽  
Criminal Court ◽  
Crimes Against Humanity ◽  
Law Firm ◽  
Constitutional Development ◽  
African Government ◽  
Public Interest Law ◽  
The North ◽  
The Government

In June 2015, President Omar Hassan Ahmad Al Bashir of Sudan attended a meeting of the African Union (AU) in Johannesburg, South Africa, despite the fact that a warrant had been issued for his arrest by the International Criminal Court (ICC) for the commission of war crimes, crimes against humanity, and genocide in the Darfur region. Although South Africa, a party to the ICC, was obliged to arrest Al Bashir and surrender him to the ICC under the terms of the Rome Statute of the ICC, the South African government made no attempt to apprehend him. On the application of a South African public interest law firm, the North Gauteng High Court ordered that the government was required by law to arrest and detain Al Bashir. Al Bashir was, however, allowed to leave South Africa.

scholarly journals The impact of atmospheric rivers on rainfall in New Zealand

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jingxiang Shu ◽  
Asaad Y. Shamseldin ◽  
Evan Weller
Keyword(s):  
New Zealand ◽  
Austral Summer ◽  
Daily Rainfall ◽  
Extreme Rainfall ◽  
Detection Algorithm ◽  
Extreme Rainfall Events ◽  
Rainfall Events ◽  
Atmospheric Rivers ◽  
Hydrological Hazards ◽  
The Impact

AbstractThis study quantifies the impact of atmospheric rivers (ARs) on rainfall in New Zealand. Using an automated AR detection algorithm, daily rainfall records from 654 rain gauges, and various atmospheric reanalysis datasets, we investigate the climatology of ARs, the characteristics of landfalling ARs, the contribution of ARs to annual and seasonal rainfall totals, and extreme rainfall events between 1979 and 2018 across the country. Results indicate that these filamentary synoptic features play an essential role in regional water resources and are responsible for many extreme rainfall events on the western side of mountainous areas and northern New Zealand. In these regions, depending on the season, 40–86% of the rainfall totals and 50–98% of extreme rainfall events are shown to be associated with ARs, with the largest contributions predominantly occurring during the austral summer. Furthermore, the median daily rainfall associated with ARs is 2–3 times than that associated with other storms. The results of this study extend the knowledge on the critical roles of ARs on hydrology and highlight the need for further investigation on the landfalling AR physical processes in relation to global circulation features and AR sources, and hydrological hazards caused by ARs in New Zealand.

scholarly journals Institutional, gender and racial profiles of South African optometrists

2011 ◽  
Vol 70 (3) ◽  
Author(s):  
U. Nirghin ◽  
N. Ebrahim Khan ◽  
K. P. Mashige
Keyword(s):  
South Africa ◽  
South African ◽  
Population Distribution ◽  
Health Professions ◽  
Free State ◽  
Racial Categories ◽  
The North ◽  
Kwazulu Natal ◽  
Gender Profile ◽  
The University

This paper sets out to profile optometric gradu-ates in South Africa. The 2008 register of the Health Professions Council of South Africa (HPCSA) was used to identify the number of registered optometrists, their qualifications and institutions where they obtained their primary optometry qualification. The gender and racial profiles of these optometrists were obtained from the institutions where they qualified. A comparison of the profiles ofthe registered practitioners pre-democracy (1930-1994) and post-democracy (1995-2008) was made. Few (28.1%) of the optometrists were trained in the years 1930-1994, while the rest (71.9%) were trained from 1995-2008. During the period of1930-1994, 64.2% of the optometrists were males and 35.8% were females and from 1995 to 2008, the gender profile changed to 66.4% females and 33.6% males. In the pre-democracy period (1930-1994), almost three quarters (74%) of the registered optometrists were White, 15.3% were Indians, 7.9% were Black and 2.8% were Coloured. Many (56.9%) that were registered pre-1994 were trained at the Technikon Witwatersrand (TWR), 17.1% were trained at the University of Durban Westville (UDW), 11.9% at the Rand Afrikaans University (RAU), 6.7% at the University of the North (UNIN) and 7.4% had trained in institutions outside South Africa. The percentage of White optometrists post-democracy (1995-2008) decreased to 44.3%, while those of Indians increased to 22%, Blacks increased to 28.9% and Coloured to 4.8%. Almost half (48.2%) of the optometrists in the post-apartheid era (1995-2008) were trained at the University of Johannesburg (UJ), TWR and RAU, 21.5% at UDW and University of KwaZulu-Natal (UKZN), 23.7% at UNIN and the University of Limpopo (UL), 4% at the University of Free State (UFS) and others (2.6%) had trained outside South Africa. As at 2008, the majority (51.7%) of all registered optometrists were White, 22.2% were Black, 21.9% were Indian while 4.2% were Coloured and included 57.8% females and 42.2% males. The results of this study indicate that the number of females in all racial categories has increased post-democracy. Although the number of Black optometrists has increased in the post-democracy era, the increase does not yet reflect the national population distribution. Optometry departments need to improve on the equity targets.(S Afr Optom 2011 70(3) 123-128)

scholarly journals Erythristic leopards Panthera pardus in South Africa

Bothalia ◽  
2016 ◽  
Vol 46 (1) ◽  
Author(s):  
Tara J. Pirie ◽  
Rebecca L. Thomas ◽  
Mark D.E. Fellowes
Keyword(s):  
South Africa ◽  
South African ◽  
Camera Traps ◽  
Colour Morph ◽  
Panthera Pardus ◽  
North West ◽  
North East ◽  
The North ◽  
In The Wild ◽  
Genetically Determined

Background: Leopards (Panthera pardus) show genetically determined colour variation. Erythristic (strawberry) morphs, where individuals are paler and black pigment in the coat is replaced by a red-brown colour, are exceptionally rare in the wild. Historically, few records exist, with only five putative records known from India.Objectives: To record the presence of erythristic leopards in our study site (Thaba Tholo Wilderness Reserve, Mpumalanga) and to collate records from across South Africa. Method: A network of camera traps was used to record individual leopards at Thaba Tholo. We also surveyed local experts, searched the popular South African press, and used social media to request observations.Results: Two out of 28 individual leopards (7.1%) recorded in our study site over 3 years were of this colour morph. We obtained records of five other erythristic leopards in the North West and Mpumalanga regions, with no reports outside of this population.Conclusions: Erythristic leopards are widely dispersed across north-east South Africa, predominantly in the Lydenburg region, Mpumalanga. The presence of this rare colour morph may reflect the consequences of population fragmentation.

scholarly journals Hourly Analyses of the Large Storms and Atmospheric Rivers that Provide Most of California’s Precipitation in Only 10 to 100 Hours per Year

2018 ◽  
Vol 16 (4) ◽  
Author(s):  
Maryam Lamjiri ◽  
Michael Dettinger ◽  
F. Martin Ralph ◽  
Nina Oakley ◽  
Jonathan Rutz
Keyword(s):  
San Francisco ◽  
Sierra Nevada ◽  
Southern California ◽  
Extreme Rainfall ◽  
Annual Rainfall ◽  
North Coast ◽  
Northern California ◽  
Rainfall Events ◽  
Atmospheric Rivers ◽  
The North

California is regularly impacted by floods and droughts, primarily as a result of too many or too few atmospheric rivers (ARs). This study analyzes a two-decade-long hourly precipitation dataset from 176 California weather stations and a 3-hourly AR chronology to report variations in rainfall events across California and their association with ARs. On average, 10-40 and 60-120 hours of rainfall in southern and northern California, respectively, are responsible for more than half of annual rainfall accumulations. Approximately 10-30% of annual precipitation at locations across the state is from only one large storm. On average, northern California receives 25-45 rainfall events annually (40-50% of which are AR-related). These events typically have longer durations and higher event-precipitation totals than those in southern California. Northern California also receives more AR landfalls with longer durations and stronger Integrated Vapor Transport (IVT). On average, ARs contribute 79%, 76%, and 68% of extreme-rainfall accumulations (i.e., top 5% events annually) in the north coast, northern Sierra, and Transverse Ranges of southern California, respectively. The San Francisco Bay Area terrain gap in the California Coast Range allows more AR water vapor to reach inland over the Delta and Sacramento Valley, and thus, influences precipitation in the Delta’s catchment. This is particularly important for extreme precipitation in the northern Sierra Nevada, including river basins above Oroville Dam and Shasta Dam. This study highlights differences between rainfall and AR characteristics in coastal versus inland northern California, differences that largely determine the regional geography of flood risks and water-reliability. These analyses support water resource, flood, levee, wetland, and ecosystem management within the catchment of the San Francisco estuary system by describing regional characteristics of ARs and their influence on rainfall on an hourly timescale.

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