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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

NBT tests compulsory for all prospective students of the Faculty of Health Sciences at the UFS
2010-05-21

All prospective students who apply for study in the Faculty of Health Sciences (excluding Nursing) at the University of the Free State in 2011, must undergo die National Benchmark Tests (NBT) on 17 July 2010 or 31 July 2010.

Students who do not have an NBT test result will not be considered for selection at the Faculty of Health Sciences. The Health Sciences Placement Tests (HSPT) has been replaced by the NBT.

Applications for selection for 2011 close on 28 May 2010. A student who has not undergone the test will not be considered for selection and no exceptions will be allowed. If a student therefore does not undergo the test on 17 July 2010 or 31 July 2010, the university will not have the results in September 2010 before the preliminary selection takes place.

Prospective students who have undergone the test before 2010 will have to write the test again. Only students who have undergone the NBT in 2010 needn’t write the test again, but they have to fax their NBT reference number to 051 401 3226.

Prospective students have to register at www.nbt.ac.za  themselves and undergo the test. The cost of writing the test is R110.

The NBT is used by all universities in South Africa to improve the quality of education and learning in order to enhance the performance of students.

Students may visit the www.nbt.ac.za  web page for any further enquiries. Enquiries about applications en selection to the Faculty of Health Sciences at the UFS may be directed at AdminFHS@ufs.ac.za  or feel free to visit the UFS web page at www.ufs.ac.za/HealthSelection  . Students are requested to read the question-and-answer section regarding selection.

Media Release
Issued by: Lacea Loader
Director: Strategic Communication (acting)
Tel: 051 401 2584
Cell: 083 645 2454
E-mail: loaderl@ufs.ac.za  
21 May 2010
 

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