Latest News Archive

Please select Category, Year, and then Month to display items
Previous Archive
12 October 2020 | Story Leonie Bolleurs | Photo Supplied
Adriaan van der Walt
Although several international studies have used temperature metrics to statistically classify their seasonal divisions, a study in which Adriaan van der Walt was involved, would be the first known publication in a South African context using temperature as classification metric.

Gone are the days when we as South Africans would experience a three-month spring season, easing into summer, and then cooling off for three months before we hit winter.

Adriaan van der Walt, Lecturer in the Department of Geography at the University of the Free State (UFS), focuses his research on biometeorology (a specialist discipline exploring the role and climate change in physical and human environments) as well as climatology and geographic information systems.

He recently published an article: ‘Statistical classification of South African seasonal divisions on the basis of daily temperature data’ in the South African Journal of Science.

In this study, which Van der Walt undertook with Jennifer Fitchett, a colleague from the University of the Witwatersrand, data on daily maximum and minimum temperatures was collected from 35 meteorological stations of the South African Weather Service, covering the period between 1980 and 2015.

They went to great lengths to ensure that they had a complete set of data before presenting it to demonstrate seasonal brackets.

First for South Africa

Their statistical seasonal brackets indicate that South Africans now experience longer summers (from October to March), autumn in April and May, winter from June to August, and spring in September.

Although considerable work has been done using rainfall to determine seasonality in Southern Africa, Van der Walt believes that these methods did not work well as there are too many inconsistencies in this approach, as identified by Roffe et al. (2019, South African Geographical Journal). To make matters more complicated – as a semi-arid region, and with desert conditions along the west coast – some regions do not have enough rainfall to use as a classifier.

Temperature, on the other hand, worked well in this study. “Temperature, by contrast, is a continuous variable, and in Southern Africa has sufficient seasonal variation to allow for successful classification,” says Van der Walt.

He continues: “Although several international studies used temperature metrics to statistically classify their seasonal divisions, this study would be the first known publication in a South African context using temperature as classification metric.”

Van der Walt says what we understand as seasons largely relates to phenology – the appearance of blossoms in spring, the colouration and fall of leaves in autumn, and the migration of birds as a few examples. “These phenological shifts are more sensitive to temperature than other climatic variables.”

Seasonal brackets

According to Van der Walt, they believe that a clearly defined and communicated method should be used in defining seasons, rather than just assigning months to seasons.

“One of the most important arguments of our work is that one needs to critically consider breaks in seasons, rather than arbitrarily placing months into seasons, and so we welcome any alternate approaches,” he says.

A number of sectors apply the temperature-based division to their benefit. “For example, in the tourism sector it is becoming increasingly important to align advertising with the season most climatically suitable for tourism,” says Van der Walt.

Temperature-based division is also used to develop adaptive strategies to monitor seasonal changes in temperature under climate change. However, Van der Walt points out that each sector will have its own way of defining seasons. “Seasonal boundaries should nevertheless be clearly communicated with the logic behind them,” he says.

News Archive

Workplace discrimination and unfair practices explored in new book
2017-09-13

 Description: Denine read more Tags: Denine Smit, Labour law, employee relations, bullying, vulnerability, research, Damain Viviers 

Dr Denine Smit
Photo: Supplied

Two law scholars, Dr Denine Smit and Dr Damian Viviers, from the Faculty of Law at the University of the Free State (UFS) recently launched a book titled Vulnerable Employees, which was inspired by their interest in researching, creating awareness and providing a legal exposition in relation to employees who are vulnerable and experience prejudice and dignity violations in the workplace. These include workplace bullying, appearance-based discrimination, those who are gender fluid or have mental-health conditions.
“Dr Viviers, who is also a former student of mine, and I, have been working together for years and share a common understanding in relation to our various topics of interest. We often share the same train of thought. This is how we came to work together to produce this book,” said Dr Smit.


Research focused on employee challenges in the workplace

The book expands on the field of knowledge regarding certain categories of employees who, as a consequence of various mutable, immutable and semi-immutable characteristics, as well as behavioural experiences, are rendered vulnerable in their employment relationships. The book draws on various social, psychological and other empirical considerations, as well as comparative legal research from foreign and international law, in order to expand on the legal position under the South African legal framework governing these conditions. While the book first and foremost constitutes a compendium of research to be used for this purpose, it also serves as a practical guide for all legal practitioners, human resources managers, other labour stakeholders and the judiciary.

Book draws strength in other academic fields
Vulnerable Employees was launched on 28 July 2017 at the UFS library, to an audience of academics and students, with a panel discussion made up of the authors and two other panellists. One of the panellists was Dr Katinka Botha, a leading psychiatrist in the Free State who has a wealth of experience in this field. “Her selection as a panellist was motivated by the various significant inter-disciplinary considerations and intersections between psychology, psychiatry and law, contained in the book,” said Dr Smit. 
“Dr Botha’s expertise was invaluable in shedding light on mental-health considerations during the panel discussion.” 
Mr Lesley Mokgoro, the other panellist, is a leading labour law practitioner, as well as director and head of the Dispute Resolution Practice Group at Phatshoane Henney Attorneys. “His years of experience working with all role players in the employment domain, as well as his extensive legal knowledge and expertise, made him uniquely qualified to serve on the panel and deliver an opinion of the practical and academic value of the book,” said Dr Smit.


Workplace policies key to securing employee rights

There are a number of growing trends in the workplace that could shape the practice of labour law or workplace policies. Dr Smit said the need for employers to regulate workplace culture, particularly in relation to bullying, harassment and unfair discrimination, in line with the South African legal framework, was a fundamental need in all workplaces. Effective workplace policies may be used to clearly outline the relevant “dos and don’ts” to employees, as well as the procedures and processes that may be followed in order to address such conduct. Workplace policies serve to advance legal certainty and efficiency, since the rights and obligations of all role players are clearly demarcated, or should be, in terms of a well-drafted and considered policy. 
The book is one of several publications produced by Dr Smit in collaboration with Dr Viviers on the topic of workplace discrimination and the law. The two scholars are working on another book to be published at the end of 2017.

We use cookies to make interactions with our websites and services easy and meaningful. To better understand how they are used, read more about the UFS cookie policy. By continuing to use this site you are giving us your consent to do this.

Accept