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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

Tactile paving assists visually impaired
2017-10-28

Description: ' 000 Blind Tactile Paving Tags: Blind Tactile Paving

Tactile paving is being installed at pedestrian crossings to assist
visually-impaired persons at the UFS.
Photo: Supplied

Crossing roads and accessing buildings has always been a challenge for people with visual impairments. They had to rely on peripheral sounds, such as car brakes and cues. However, after the installation of tactile paving – paving with special textures assisting the visually impaired to feel the difference between walking around on campus and crossing the road, this will no longer be a problem at the University of the Free State (UFS).

This is one of several developments that University Estates’ Department of Facilities Planning has in the pipeline for 2017 in order to ensure that the university attains its key component in providing a high-quality student experience.

Maureen Khati, Assistant Director of Project Management: Facilities Planning, says, “We saw the need to install these paving blocks in strategic spaces, as identified by the Center for Universal Access and Disability Support (CUADS).” She says these blocks will make it easier for people with visual impairments.

Special features designed to aid visually-impaired persons

These installations have special features that will assist those students and employees with limited vision or blindness to navigate through pedestrian crossings and the different campus buildings. The university chose a unique design of tactile paving that focuses on warning and directing those with visual impairments.

UFS eager to improve accessibility and mobility

The university, and all the stakeholders involved in this initiative, are delighted to be embarking on this project and are looking forward to its successful execution. To improve accessibility and mobility, more accessible entrances and exits will be built, effective signage will be installed inside and outside buildings, but the most important aspect is that dedicated seating space will be made available in lecture rooms for special-needs students.

Khati says, “More focus has been put on installing ramps in all buildings to make them more accessible for people with disabilities, as well as other needs required to enhance accessibility at the UFS.”

For the UFS, this initiative is one of many to come, as extensive research is being done and priorities are implemented accordingly.

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