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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

Council approves appointment of two deans
2008-06-14

The Council of the University of the Free State (UFS) approved the extension of the contract of Prof. Herman van Schalkwyk, Dean: Faculty of Natural and Agricultural Sciences for a further five years during its recent meeting. The appointment of Prof. Francois Tolmie as acting Dean of the Faculty of Theology was also approved.

Prof. Tolmie will be acting as Dean as from 1 July 2008 and will be appointed as dean on 1 January 2009 for a term of five years. He is appointed in the place of Prof. Hermie van Zyl who will be retiring at the end of June 2008.

The Faculty of Natural and Agricultural Sciences has reached many highlights under Prof. Van Schalkwyk’s leadership. It has grown to an influential faculty, known for its world-class academic quality and research and the successful preparation of students for their careers in the sciences.

Before his appointment as dean, Prof. Van Schalkwyk was chairperson of the Department of Agricultural Economics at the UFS. He serves on the executive committee of the UFS’s Executive Management and is chairperson of the Deans Committee. Over and above his work at the UFS, he is involved in various provincial and national organisations.

He was among others appointed by the Minister of Agriculture in 2007 as member of the National Agricultural Marketing Council and in 2008 he was appointed vice-chairperson of the Land Bank Council. He is also a consultant to the World Bank and other South African organisations, a specialist in agricultural and related court cases and popular speaker at agricultural societies in South Africa and Namibia, to name a few.

Prof. Tolmie was a Senior Professor in the Department New Testament at the UFS. He is member of various national and international organisations and academic committees, among others editor of Acta Theologica, the faculty’s accredited journal.

During his term as Dean, Prof. Tolmie aims to establish meaningful liaison with international universities, increase the faculty’s average research output and increase the current number of academics from the faculty who are graded by the National Research Foundation (NRF).

Media Release
Issued by: Lacea Loader
Assistant Director: Media Liaison
Tel: 051 401 2584
Cell: 083 645 2454
E-mail: loaderl.stg@ufs.ac.za  
13 June 2008

 Prof. Francois Tolmie
 
 Prof. Herman van Schalkwyk

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