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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

Scaena Theatre: Boom! (Afrikaans) 7-9 May
2009-05-08

Produksie: Boom!
Regie: Adriaan Meyer
Teks: Nataniël
Kostuums: Errol Arendz
Stelontwerp: Strijdom van der Merwe
Datum: 7-9 Mei
Venue: Scaena-teater
Kaartjie-pryse: R65 & R95
Besprekings: Computicket

BLOEMFONTEIN: Nataniël-aanhangers wat nog nie Boom! gesien het nie, moet gou spring vir kaartjies. Die produksie is gedurende Mei-maand moontlik vir die laaste keer in Bloemfontein te sien.

Boom! is deur Nataniël geskryf. Al die 2008-vertonings van die stuk op Aardklop en die Volksbladfees is al uitverkoop. Ekstra vertonings moes gereël word. Die produksie was ook op ander feeste, soos die Woordfees op Stellenbosch te sien. Die eenvrou-tragikomedie is `n vertoonstuk vir die vaardige spel van met Hilletje Möller.

Hilletje Moller verwerf in 2005 haar B.A Drama en Teaterkuns aan die Universiteit van die Vrystaat, waar sy Universiteits erekleure vir teaterkuns verwerf. Hilletjie maak haar professionele debuut, tydens haar vertolking van die hoofrol in Skerp-sin (oorspronklike teks deur Pulitzer pryswenner Margaret Edson). Verder was sy al op die verhoog te sien in produksies soos “Die Huweliksaansoek" , “Nag van Legio", “Bloedbruilof", “Weer" en “Bewys" wat in 2008 Beste Debuut Produksie by die Volksblad Kunstefees aangewys is. Hilletje is in 2008 gekeur om haar studies aan die Lee Strasberg drama instituut in New York voort te sit.

Op 7-9 Mei om 19:30 is BOOM! In die Scaena-teater op die UV-kampus te sien. `n Middagvertoning om 14:30 is ook op Saterdag gereël. Kaartjies is beskikbaar teen R65. Teen slegs R95 per persoon is 20 sitplekke per vertoning beskikbaar op die leerbanke en sluit sjerrie in.

Besprekings is deur Computicket (Mimosa Mall en Checkers).
 

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