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Landscape change studies bring better understanding of climate change

03 November 2022 | Story Leonie Bolleurs | Photo Supplied

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

Kovsie artists to rock at Vryfees

2014-06-18

Photo: Conrad Bornman

It is the dead of winter in the heart of the Free State. The Vryfees is laying full steam ahead.

However, the talent that makes of this annual arts festival such a phenomenal success doesn’t only come from outside of our Bloemfontein Campus. This year’s productions will abound with performances by Kovsie staff, students and alumni from our Department of Drama and Theatre Arts.

Behind the scenes, our people will also play a vital role in the achievement and progress of the festival. Prof Luwes is a member of the festival committee and together with Dr Venter and Godfrey Manenye, he also serves on the artistic selection committee for theatre.

Thys Heydenrych, lecturer in the above department, was appointed as the technical manager of this year’s Vryfees. This means that he is in charge of the placement and assigning of venues for productions on campus. All the technical aspects for these venues rest on Heydenrych’s shoulders. For this huge task, he is supported by a team of technical staff which includes mostly students.

Take a look at the list of all our Kovsie artists who are working hard to make the 2014 Vryfees better than ever:

Don Juan onder die Boere
Lecturers: Walter Strydom, Gerben Kamper (director),
Students: Mark Dobson, Michael Garbett, Helet de Wet
Former students: Marijda Kamper (Wynand Mouton theatre manager), Ilne Fourie, Hilletje Möller, Chanmari Erasmus, Michelle Hoffman, An-Mari Loots, Madré van Straten

S(t)out en Peper
Lecturers: Dr Pieter Venter (director), Thys Heydenrych
Former students: Ilne Fourie, Michelle Hoffman

Nag van die Hiëna
Head of Department: Prof Nico Luwes (author and director)
Lecturers: Gerben Kamper, Minette Grové
Former students: Carel Nel, Lindy-Lee Kleynhans, Ilne Fourie, Angelo Mockie (staff member at Student Affairs)
Student: Peter Taljaard (PhD student)

Rondomskrik
Former student: Chrystal-Donna Roberts (currently Pasella presenter and previously on the set of 7de Laan)

Slaaf
Former student: Carel Nel

Te Veel vir ? Coloured Girl
Former students: Angelo Mockie (staff member at Student Affairs), Olivie Sauer

The Bar
Lecturer: Godfrey Manenye (director)
Former students: Angela Edwards, Jane Mpholo
Students: Yoliswa Jacobs and Luandro Carstens

Victoria se Geheim
Lecturer: Dr Pieter Venter (director)
Former students: Chanmari Erasmus, Carel Nel, Gené McCaskill, Michelle Hetzel
Students: Helet de Wet, Marli van der Bijl (NRF Magister Intern), Jana Coetzer, Marnel Bester

Een Kleine Lientjie
Lecturer: Walter Strydom
Former student: Anna Visser (author and director, OFM presenter)
Students: Marli van der Bijl, Charl Henning, Jana Coetzer

For more information on the productions or the Vryfees programme, follow this link:
http://www.vryfees.co.za/

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