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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

UFS Centenary 2004 / 2005 October (centenary) fest Activities

2004-10-08

Friday, 08 October 2004
17:00 – 24:00
Callie Human Centre, UFS
Macufe Rock Concert
With: Rooibaardt, Karen Zoid, The Narrow, F****polisiekar, Stuurbaard Bakkebaard (from the Netherlands), DJ Bob, Ready D, Neva Me.
Cost : R50-00
Bookings : Pacofs (051-447 7772)

Sunday, 10 October 2004
16:00 – 18:00
Callie Human Centre, UFS
Macufe Three Tenors Concert
With: Phillip Kotze, Chris Coetzer and Du Preez Stolz, as well as Angela Kerrison. Free State Symphony Orchestra conducted by Chris Dowdeswell.
Cost :R60-00 (adults), R40-00 (children, scholars, students and pensioners)
Bookings : Pacofs (051-447 7772)

Tuesday, 12 October 2004
11:00 – 15:00
Centenary Complex, UFS
Inauguration of Centenary Complex
Open day with a variety of musical recitals in different rooms
Cost : Free
Enquiries : Elize Rall (051-401 3382)

15:00 – 17:00
Parking area next to the Centenary Complex, UFS
Kovsie Mosaic Day
Collage of the Century, Dance to the beat, Cultural Cartoon,
Who’s line is it anyway?
Cost : Free
Enquiries : Louis Botha (051-401 2819) or
AC Geldenhuys (084 585 3338)

Wednesday, 13 October 2004
19:00
Centenary Complex, UFS
Première of documentary film : The Life and Legacy of King Moshoeshoe
Note : By invitation only
Enquiries : Elize Rall (051-401 3382)

Thursday, 14 October 2004
18:45 – 21:00
Red Square (in front of Main Building), UFS
Centenary Honorary Doctorate Degree Graduation Ceremony
Conferred on: Me. Antjie Krog, Prof. Jakes Gerwel, Mr. Karel Schoeman, Dr. Frederick van Zyl Slabbert, Prof. Saleem Badat, Dr. Khotso Mokhele, Prof. Robert Bringle, Prof. Leo Quayle, Prof. Jack de Wet, Prof. Kerneels Nel (posthumously), Prof. Boelie Wessels and Prof. Jaap Steyn .
Cost : Free. Please RSVP if you would like to attend.
Enquiries : Elize Rall (051-401 3382)

Friday, 15 October 2004
18:30
Centenary Complex, UFS
Alumni Dinner and Centenary Award Ceremony
Approximately 140 centenary medals will be awarded in acknowledgement of exceptional contributions to the development of the University. The award ceremony is followed by the Alumni dinner in the Callie Human Centre.
Cost : R100-00/person
Enquiries : Elize Rall (051-401 3382)

15:00 (to 12:00, Saturday, 16 October 2004),
UFS campus
Reunion : Momentum Adventure and Expedition Association
Including : Setting up of the Kovsie Momentum base camp, champagne breakfast and abseiling.
Cost : R50-00/person for breakfast
Enquiries : Gerrit van der Merwe (072 4317 153) or
Niel Fraser (082 772 5642)
Website : www.uovs.ac.za/associations/momentum_hrcc.

19:00 (to 11:00 Sunday, 17 October 2004)
Reunion : Cantare Revue Group
Including : Formal dinner, budget show, bring and braai, church service.
Cost : R100-00/person for the dinner
Enquiries : Louis Botha (051-401 2819)

19:00 (to 24:00 Saturday, 16 October 2004
Reunion : House NJ van der Merwe
Including : Senior Student’s Association and concerts
Cost : R5-00/person
Enquiries : Tutu Ntlathi (051-401 4122 / 072 865 2227)

Saturday, 16 October 2004
09:00 – 10:00
Committee Room 120, Faculty of Theology
Founding of Theology Alumni Association
Enquiries: Henna Nel (051-401 2669)

10:00 – 12:00
Parking area, CR Swart Building, UFS
Alumni Campus Tour
Including : Visits to the new physical developments on campus
Cost : Free
Enquiries : Jeanette Jansen (051-401 3594)

10:00 – 12:00
Sonnedou gazellie (next to NJ van der Merwe Residence), UFS
Reunion : Ladies’ Tea
Visit our new gazellie and find out what Sonnedou is up to these days.
Cost : R25-00/person
Enquiries : Anne-Marie Delport (072 109 0507)

12:00 – 16:00
JBM Hertzog Residence (garden in front of Senior Student’s Association), UFS
Reunion : Braai
Cost : Approximately R20-00/person
Enquiries : Hattingh Bornman (084 240 5226)

12:00 Vergeet-my-nie Residence, UFS
Reunion : Braai
Bring and braai. We supply the facilities. Bring old photographs and stories. Enjoy Aunt Juls’ last visit.
Cost : Free
Enquiries : Mari Jordaan (051-444 2832/072 392 4444)

12:00 HF Verwoerd Residence Senior Student’s Association, UFS
Reunion : Spit roast
Cost : R60-00/person
Enquiries : Jan-Chris Landman (051-401 3613 / 082 664 6062)

18:30 Floreat Hall, Bloemfontein Civic Centre (Braam Fisher Building)
Irawa 60 Reunion
For all former editors, former and current main editorial staff and coworkers
Cost : R100-00/person
Enquiries : Sanri van Wyk (072 333 1011)
Elzette Boucher (072 180 6265)

19:00 – 24:00 Red Square (in front of Main Building), UFS
Informal Alumni Reunion
Spit roast and stories in a marquee
Cost : R60-00/person
Enquiries : Elize Rall (051-401 3382)

Sunday, 17 October 2004
10:00 – 11:00
Kovsie Church
Church Service

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