Latest News Archive

Please select Category, Year, and then Month to display items

SA now experiencing half-year summers

12 October 2020 | Story Leonie Bolleurs | Photo Supplied

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

Enhancement of social justice focus at research colloquium

2010-10-07

At the third Education for Social Justice Research Colloquium the publication Praxis towards sustainable empowering learning environments in South were handed to Prof. Ezekiel Moraka, Vice-Rector: External Relations at the UFS. At this occasion were, from the left: Prof. Dennis Francis, Dean of the UFS Faculty of Education; Prof. Sechaba Mahlomaholo, Research Professor in the Faculty of Education Sciences at the North-West University; Prof. Moraka; and Dr Milton Nkoane, Senior Lecturer in the UFS Faculty of Education.
Photo: Leonie Bolleurs

This year, the University of the Free State (UFS) was the host for the Research Colloquium: Education for Social Justice for the very first time. It is the third time that this colloquium has been presented.

Prof. Ezekiel Moraka, Vice-Rector: External Relations at the UFS, opened the colloquium, stating that academics, through their research, are ultimately in a good standing to advise government on important issues such as social justice for them to address these issues accordingly.

Prof. Sechaba Mahlomaholo, Research Professor in the Faculty of Education Sciences at the North-West University, delivered the opening address on the theme: Validating community cultural wealth towards sustainable empowering learning environments for social justice. He said that the legacy of our recent past as South Africa still continues to haunt us, especially as exemplified in the dysfunctionalities that are rife in our education.

“With the colloquium we manage to bring together the ideas, thoughts, resources and efforts of educators and/or educationists concerned with the creation of a more equitable, equal, free, hopeful, peaceful and socially just society. Through our teaching, our community engagement and research activities we strive towards a more humane, caring, respecting and respectful South Africa and the world,” he said.

According to Prof. Mahlomaholo, education and its research are some of the most potent mechanisms at the very centre of social transformation. The papers at the colloquium focused on investigating, understanding and responding to issues of amongst others:

The medium of teaching and learning which continues to be a barrier to many learners to perform to the best of their abilities in the majority of the education institutions in South Africa;
Health, sexuality, HIV/Aids, stigmatisation and other deseases plaguing our communities currently;
Self-fulfilling prophecies and stereotypes about some learners not being as intelligent as the rest and this finally being reflected and confirmed in their poor academic achievements;
Differentiated levels of parental involvement in the activities of their children’s learning due to long absences from their families as they have to work in far-off places of employment;

Papers delivered at the colloquium moved beyond merely identifying the problems; they also suggested possible and plausible research-based solutions to these, such as integrating HIV/Aids education in curricula, listening to the aspirations of significant stakeholders such as mothers and parents generally in teaching and facilitating more rigorous community engagement practices.

At the colloquium gala dinner the book Praxis towards sustainable empowering learning environments in South Africa by authors Dr Milton Nkoane, Senior Lecturer in the UFS Faculty of Education, Prof. Mahlomaholo and Prof. Dennis Francis, Dean of the Faculty of Education at the UFS, was launched. The publication consists of a collection of the best peer-reviewed papers from a conference with the theme Creating sustainable empowering learning environments through scholarship of engagement. The main criterion for inclusion was that the paper should contribute to the theme by means of an original, tight, theoretical and empirical study conducted with the aim of informing the practice of creating sustainable empowering learning environments. The concrete cases examined in many of the chapters are very useful to helping readers understand the specific, on-the-ground concerns related to higher education and schools.

Media Release
Issued by: Leonie Bolleurs
Strategic Communication
Tel: 051 401 2707
Sel: 0836455853
Email: bolleursl@ufs.ac.za
30 September 2010

Back

Economic and Management Sciences

Education

Health Sciences

The Humanities

Law

Natural and Agricultural Sciences

Theology and Religion

Open Distance Learning

Business School

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