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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

UFS hockey teams crowned as Free State hockey champions
2009-09-21

The University of the Free State’s (UFS) men’s and women’s hockey teams were recently crowned as the Free State hockey champions during the championship that took place on the university's astro fields in Bloemfontein.

Kovsie women defeated Raiders (the defending champions) 6-0 and the Kovsie men’s hockey team successfully defended their title against Tweespruit. During a penalty shootout UFS Reds beat the team of the Central University of Technology (CUT 1) 8-7, thereby ending in the third position.

Very early on the Kovsie women’s hockey team showed that they wanted to break the five-year drought without a trophy and within the first ten minutes they took the lead with 2-0 against Raiders. Liza Dreyer scored her first two goals out of four and from that moment on the Raiders were with their backs against the wall. With the score of 4-0 at halftime it was clear that Kovsies would have a second trophy in their cupboard after their recent success during the USSA championships. After halftime, Odie Swart scored another goal from a penalty corner and Liza scored her fourth goal, to bring the end score to 6-0. Malisa Kala was the other Kovsie who scored a goal.

Odie Swart, captain of the Kovsies played her last match for the Kovsies with Cat van Zuydam. She excelled in the attack as well as in the defence.

The Kovsies men’s hockey team has now done it three out of three times! Within the first twenty minutes the Kovsies men’s hockey team defeated Tweespruit with brilliant hockey by scoring three goals. Luke Sanan (2) and Kurt Henzberg (1) scored the goals. All three the goals were well-executed field goals. The current Kovsie team is surely the best-rounded hockey team that the Free State has had over the last ten years. In the past three years the students played in more than 45 club matches and they did not lose one match!

With the joy also comes sadness. For Braam van Wyk it was his last match as coach of a Kovsie team. For the past 17 years Braam has been involved with Kovsie hockey, in which he led the girls to twelve victories in the Free State league. The last three years he managed the men’s team, who won the league for the past three consecutive years, indeed an achievement. With Braam, three other senior players of the past three years made their last appearance for Kovsies. They are Morne Odendaal, Renaldo Ogle and Braam van Wyk (jr.).

Literally during the last moments of their game against CUT 1, the UFS Reds, who were 1-4 behind, scored a goal, which brought the final score to 4-4. The Kovsie students won the penalty shootout with 4-3, thereby winning 8-7 and thus ending third in this year’s men’s Free State league. 
 

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