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26 August 2022 | Story NONSINDISO QWABE | Photo Boitumelo Molefe
Prof Geofrey Mukwada
Prof Geofrey Mukwada from the Department of Geography on the Qwaqwa Campus delivered his inaugural lecture, which focused on elevation-dependent warming in the Drakensberg Mountain region.

South Africa is generally regarded as a thirsty country due to water scarcity nationally. Even a rise of 0,5 °C in climate temperatures could have devastating effects on the environment.

Delivering his inaugural lecture on 22 August 2022 – a first for the Qwaqwa Campus in many years – Prof Geofrey Mukwada of the Department of Geography at the University of the Free State (UFS) Qwaqwa Campus painted a picture of the long-term effects of climate change on ecological, social, and economic aspects of the environment. The effects of climate change are being felt in all regions of the world, and the Drakensberg region in particular is beginning to bear the brunt.

Elevation-dependent warming a threat to socio-ecological systems

Introducing his topic, The last days of plenty: an assessment of elevation-dependent warming in the Drakensberg Mountain region between 1980 and 2018 and its potential implications for social-ecological systems in the region and downstream communities, Prof Mukwada said ‘last days’ was a euphemism used figuratively to imply the impending loss of environmental resources in the mountains because of climate change.

According to Prof Mukwada, elevation-dependent warming in the Drakensberg would pose serious implications for the overall rural livelihoods, regional trade, and biodiversity conservation.

“The Drakensberg Mountains is made up of a chain of several mountains and is home to a lot of activities. It is important for rural livelihood, including agriculture, cultivation of different forms, fisheries, and tourism, and if the climate is therefore changing and elevation-dependent warming is taking place, we see a threat to socio-ecological systems in many ways.”

In his lecture, Prof Mukwada discussed the three-decade-long investigation to determine if elevation-dependent warming is taking place at several points of the mountains, and to assess its environmental implications for the region and downstream communities. Using a time-series analysis standardised precipitation and evaporation index (SPEI) and monthly maximum temperature and locational and elevation data, the investigation monitored climate change trends between 1980 and 2018.

Development of research-based solutions

He said results did not confirm the existence of elevation-dependent warming in the Drakensberg Mountain region, but statistically significant evidence has shown that the region is becoming warmer and facing increasing aridity.

“It is worrisome in the sense that even such a small change can have devastating effects on the environment.”

In order to avert these problems, Prof Mukwada said a special climate adaptation plan for the region was necessary. The university plays a key role in this, as it can provide guidance on the process of redefining knowledge, scientific understanding and truth, in order to promote sound mountain development interventions and programmes. “We need to shift towards research-based solutions.”

Prof Mukwada is a C2 NRF-rated researcher with expertise in the application of remote sensing and geographic information systems (GIS) in integrated scientific and multidisciplinary environmental research.

News Archive

UFS Department of Physics offers unique learning experience with on-campus radio telescope
2015-12-14

Athanasius Ramaila, an Honours student in the Department of Physics, and Dr Brian van Soelen, a lecturer from the same department, in the laboratory where the radio telescope is housed in the new wing of the Physics Building on the Bloemfontein Campus of the UFS. The telescope will be used to expose graduate students to the basic techniques of radio astronomy.
Photo: Charl Devenish

The university this year added a four-storey wing to the existing Physics Building on the Bloemfontein Campus. The new development, which includes four lecture halls and four laboratories, complements other world-class facilities such as the X-ray photoelectron spectroscope and the scanning electron microscope.

A unique asset that distinguishes the UFS Department of Physics from other similar institutions, is the Boyden Observatory situated approximately 27 km northeast of Bloemfontein. The observatory houses a powerful 1.5 m optical telescope, and several smaller, but well equipped telescopes.

According to Pieter Meintjes, Professor in the Department of Physics, the observatory has acquired a new addition - a 0.5 m optical telescope donated by the South African Astronomical Observatory (SAAO) and the National Research Foundation (NRF) to the UFS Astrophysics Group. This optical telescope is one of two powerful optical telescopes used to introduce students to techniques such as photometry and spectroscopy.

“The telescope at Boyden forms an integral part of the Department of Physic’s student training and research programme. Because the UFS is the only university in South Africa operating such a facility, and one of only a few globally, Astrophysics students at the UFS have the unique privilege of having unrestricted access to these telescopes for their MSc and PhD studies,” says Prof Meintjes. In addition, the department has also built a radio telescope as part of a post-graduate student project. The telescope, housed in the new wing of the Physics Building at the Bloemfontein Campus of the UFS, will be used to expose graduate students to the basic techniques of radio astronomy, especially in light of the fact that the SKA is nascent. Prof Meintjes would like to act proactively by grounding his students in the relevant techniques of radio astronomy. The telescope will be used to introduce students to the manner in which radio flux calibrations are performed in order to determine the energy output of an emitting source.

At undergraduate level, the radio telescope will be used, together with optical telescopes in the Astrophysics laboratory, to place students at a high baseline regarding the level of multi-wavelength astrophysics training received at the UFS.

Third-year and Honours students will also have the opportunity of practical training in a research laboratory with 15 computers. The laboratory is equipped with software used to reduce and analyse multi-wavelength data.

“My goal is for the UFS to become the major centre of multi-wavelength astrophysics in South Africa and a key role player in the international arena. To be able to do this, our training should be world class,” Prof Meintjes said.

Aided by its world-class facilities and research, the Department of Physics is competing with the best in the world. Research-wise, a group from the Department of Physics is intensively involved with the SKA Project (Square Kilometre Array), with 3 000 dishes reaching from Carnavon in the Karoo to Mauritius in the Indian Ocean. According to Prof Meintjes, many detailed studies can be conducted with the SKA system of sources, showing major eruptions and mass effluent from the systems. Athanasius Ramaila, a BSc Honours student in Astrophysics at the UFS, has also received a two-year SKA internship, where he will be engaged in the SKA software engineering programme to help with developing software for the telescope.

The UFS Astrophysics Group is focusing on the multi-wavelength study of high-energy astrophysics sources. “This multi-wavelength approach to astrophysics is in line with the recent announcement by government that multi wavelength astrophysics will be the main focus for astrophysics research in South Africa. It is also a very important focus for research in the international arena, as can be seen from the large number of international conferences having a multi-wavelength character,” Prof Meintjes said.


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