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03 November 2022 | Story Leonie Bolleurs | Photo Supplied
Dr Liezel Rudolph
Dr Liezel Rudolph, a lecturer in the Department of Geography, recently returned from an expedition to Gough Island in the South Atlantic Ocean, where she was involved in research that aims to better understand the landscape evolution of some subantarctic islands and their response to long-term climate change.

A study of subantarctic islands tells us that, in general, the Southern Hemisphere is experiencing a rise in temperature, with an increase in rainfall in some locations, and other areas becoming drier. The annual temperature and rainfall average remain the same in some places, but there is a change in seasonality and synoptic weather events.

This is according to Dr Liezel Rudolph, a lecturer in the Department of Geography at the University of the Free State (UFS). She recently returned from an expedition to Gough Island in the South Atlantic Ocean, supported by the South African National Department of Forestry, Fisheries and the Environment, the National Research Foundation, and the Royal Society for the Protection of Birds.

This teacher of modules on Process Geomorphology and fieldwork techniques at the UFS, says the objective of her work on the island was to do a geomorphological survey of the island and explore the suitability of geochronological dating techniques on the island’s substrate. 

She explains that with geochronological methods one can determine the age of rock material as well as the rate of landscape change on the island. “In other words, dating when the volcano was formed and determining how long it takes for weathering to break down the rock material, and erosional processes to remove soil material.”
 
The research she is involved in, forms part of a SANAP-NRF-funded project, Sub-Antarctic Landscape Climate Interactions, which aims to better understand the landscape evolution of some subantarctic Islands and their response to long-term climate change. 

Studying the past to understand the present

According to her, studying landscape change enables one to better understand climate change over a long period of time. 

She states that the more regions are investigated, the clearer the picture of climate change will become. “The Earth is a large, complex system. By studying climate change in one location, one cannot simply assume that the same type and rate of change is occurring everywhere else. It would be like imaging a 1 000-piece puzzle by building with 10 pieces. The Southern Hemisphere is predominantly ocean, which makes it difficult to pin down land-atmosphere interactions – but the subantarctic islands give us the opportunity to create data points for the Southern Hemisphere, which would otherwise be a very large missing piece of the puzzle,” explains Dr Rudolph.

She says the interaction between ocean, atmosphere, and land remains complex and it is important to study the entire picture in order to fully understand how this is happening. Especially since the climate is changing at a drastic rate.

Dr Rudolph, whose research at the UFS is focused on constraining the last glaciation of subantarctic Marion Island though various proxies and dating techniques, says the subantarctic islands are very sensitive to changes in climate. 

A clearer picture of climate change

She was part of previous expeditions to the island. Although all these expeditions had different goals, according to her, they all aimed to answer the same questions, which are how the island’s landscape has developed throughout history and what the climatic drivers were during its evolution. 

“The landscape responds to changes in temperature and precipitation. Under colder, wetter conditions – when the island’s surface is subject to a freeze-thaw process – a range of peri-glacial landforms will develop. These landforms will still be evident in the landscape years later under a different climate, for example, warmer or drier conditions. We can study these landforms in real-time and establish whether they are actively forming or are relict features that formed under different climatic environments,” remarks Dr Rudolph.

The research, which is taking place in collaboration with the British Antarctic Survey, is co-led by Prof Werner Nel from the University of Fort Hare, and Prof David Hedding from the University of South Africa. 

• Dr Rudolph is grateful to the Government of Tristan da Cunha, which is responsible for managing the conservation of Gough Island, for permitting them to do scientific work on the island. 

News Archive

World renowned cardiothoracic surgeons convene at UFS
2010-03-14

World-renowned cardiothoracic surgeons from around the world will be the guests of the Department of Cardiothoracic Surgery at the University of the Free State (UFS) when a workshop for cardiothoracic surgeons is presented at the UFS Faculty of Health from Monday, 15 March to Wednesday, 17 March 2010.

The workshop is presented by the European Association of Cardiothoracic Surgery (EACTS), which focuses on development and training in Africa.

Prof. Francis Smit, Head of the UFS Department of Cardiothoracic Surgery and also member of the international cooperation committee of EACTS, says EACTS have selected the UFS, and specifically Bloemfontein, to be the site for their African Training and Education outreach. “We are extremely honoured by this after working at it for more than four years.”

Seven world-renowned cardiothoracic surgeons, including three former presidents of EACTS, will present the training courses in Bloemfontein from 15-17 March 2010. These surgeons are from the United States of America, Norway, the Netherlands, Belgium, Switzerland and Scotland.

The European Cardiovascular Technologists are sending a perfusionist as well to present a perfusion workshop on Wednesday, 17 March 2010. The last day will be devoted to advanced surgical techniques.

The programme consists of a two-day scientific course that addresses research issues. All the invited speakers are well-known and established researchers. They all have been editors/editorial staff members of major international journals.

Prof. Smit says, “The knowledge transfer to South African surgeons can be phenomenal. Young and established surgeons can also meet the experts and improve their skills in conducting and successfully publish results.”

More than a hundred participants are expected for the workshops of the first two days, of which forty from abroad. The last day would be open registration and more than 150 people are expected.

Prof. Smit says, “This is a wonderful opportunity for us to educate, stimulate and teach surgeons in South Africa. It will add to their knowledge base and introduce them to high quality research methodology that will certainly have an impact on our research output. Hopefully this will be a bi-annual event where we can teach our academic community at a very focused and high level supported by EACTS.”

Media release
Issued by: Mangaliso Radebe
Assistant Director: Media Liaison
Tel: 051 401 2828
Cell: 078 460 3320
E-mail: radebemt@ufs.ac.za  
12 March 2010
 

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