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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. 

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Want to make a difference in the world? Here is how.
2016-05-13

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Student Bursary Fund Campaign launched: #FundAFuture and make a difference
Motho ke motho ka batho. A person is a person through others

 

We live in a world filled with want. Often, we ache to make a difference, but become overwhelmed and despondent when we look into this chasm of need. However, the University of the Free State (UFS) has created a way for each of us to change lives, in much the same way that the life of Nozi Bonje has been changed.

“Through the opportunities given to me, I realised that you don’t have to be defined by the school you went to. You can do so much more – and you can dream big dreams and realise them.”

Then
The early chapters of Nozi’s life story reveal a shy girl, hiding between the pages of her books on the playground of a township school. With barely a whisper, Nozi was slipping into a desolate future where dreams existed only in sleep.

Now

Today, that timid young girl has grown into a woman who throws her head back in effortless laughter, confidence sparking off her in bright arcs. What changed the trajectory of her future? Financial support for a tertiary education altered Nozi’s life permanently.

“If I didn’t go to university, I would have been this sad little person,” she remarks. “Studying is not just about learning from a textbook, though. It also challenges you to think critically. You start seeing things in a different perspective, and respond differently.”

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Nozi Bonje
Photo: Sonia Small

Giving back
Funding enabled Nozi to obtain a BSc degree in Human Molecular Biology at the UFS in 2015. She was one of the top students in her class. Inspired and driven, she is currently pursuing an honours degree in Molecular Genetics, also at the UFS.

“My main dream is to make a difference in people’s lives. For me, it’s all about giving back, because so many people helped me throughout my journey.”

Student Bursary Fund Campaign

In order to help increase the number of lives transformed through higher education – such as Nozi’s – the UFS has established the Student Bursary Fund Campaign. This campaign aims to raise money to fund talented, deserving students who lack the financial means of obtaining a university degree. We cannot do this alone, though.

Your support is crucial.

Each contribution will bring us closer to our goal while changing the future of our youth. Visit our Giving page for ways to donate.

 


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