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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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Two Kovsies in action for SA Netball Team in Melbourne
2016-10-18

Description: Tanya Mostert Tags: Tanya Mostert

Tanya Mostert will play at senior level for
South Africa for the first time when she
represents the Proteas Fast5 Netball team.
Photo: Johan Roux

Two players from the University of the Free State (UFS) will represent the country in the Fast5 Netball World Series in Melbourne, Australia.
Tanya Mostert and Lauren-Lee Christians will turn out for the Protea Fast5 team on 29 and 30 October. Fast5 is the shorter and faster version of netball.
Mostert was the UFS captain during the Varsity Netball tournament this year, after taking over the reins from her older sister, Karla Mostert. Tanya has to pass a final fitness test since suffering an injury earlier.

Lauren-Lee will captain this team

Christians represented Kovsies before, but this year she was above age to play in the Varsity tournament again. She represented South Africa’s Fast5 team in 2013 and 2014, but will this time be leading her country as captain "Down Under". She also was vice-captain of the Free State Crinums who won the Brutal Fruit Premier League in 2016.
Besides Christians and Mostert, three former Kovsies are also included in the Fast5 Netball team taking part in Melbourne. They are Vanes-Mari du Toit, Marlize de Bruin, and Fikile Mkhuzangwe.

Four national captains from UFS
With Christians’ selection as Fast5 captain, she became the latest of four Kovsies to be chosen as a national netball captain. All four South African teams – the Proteas, Fast5, U21, as well as the South African Universities team, were captained by Kovsies this year.
Maryka Holtzhausen, former UFS captain and currently assistant coach at the university, led the Proteas before suffering a knee injury. Alicia Puren led the SA U21 team, and Karla Mostert was captain of the South African Universities team that won the World Student Games in Miami, in the USA.

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