David William Hedding, University of South AfricaA media storm blew up in mid-March 2025 when a researcher at South Africa’s isolated Sanae IV base in Antarctica accused one of its nine team members of becoming violent.
The Conversation Africa asked geomorphologist David William Hedding, who has previously carried out research from the frozen continent, about the work researchers do in Antarctica, what conditions are like and why it matters.
What do researchers focus on when they’re working in Antarctica?
Currently, the main focus of research in the Antarctic revolves around climate change because the White Continent is a good barometer for changes in global cycles. It has a unique and fragile environment. It’s an extreme climate which makes it highly sensitive to any changes in global climate and atmospheric conditions. Importantly, the Antarctic remains relatively untouched by humans, so we are able to study processes and responses of natural systems.
Also, the geographic location of Antarctic enables science that is less suitable elsewhere on the planet. An example of this is the work on space weather (primarily disturbances to the Earth’s magnetic field caused by solar activity). Studying space weather is significant because the magnetic field of the Earth can impact communication platforms, technology, infrastructure and...
Scientists in Antarctica: why they’re there and what they’ve found
Melting Antarctic ice will slow the world’s strongest ocean current – and the global consequences are profound

Mongkolchon Akesin, Shutterstock
Taimoor Sohail, The University of Melbourne and Bishakhdatta Gayen, The University of MelbourneFlowing clockwise around Antarctica, the Antarctic Circumpolar Current is the strongest ocean current on the planet. It’s five times stronger than the Gulf Stream and more than 100 times stronger than the Amazon River.
It forms part of the global ocean “conveyor belt” connecting the Pacific, Atlantic, and Indian oceans. The system regulates Earth’s climate and pumps water, heat and nutrients around the globe.
But fresh, cool water from melting Antarctic ice is diluting the salty water of the ocean, potentially disrupting the vital ocean current.
Our new research suggests the Antarctic Circumpolar Current will be 20% slower by 2050 as the world warms, with far-reaching consequences for life on Earth.
The Antarctic Circumpolar Current keeps Antarctica isolated from the rest of the global ocean, and connects the Atlantic, Pacific and Indian oceans. Sohail, T., et al (2025), Environmental Research Letters., CC BYWhy should we care?
The Antarctic Circumpolar Current is like a moat around the icy continent.
The current helps to keep warm water at bay, protecting vulnerable ice sheets. It also acts as a barrier to invasive species such as southern bull kelp and any animals hitching a ride on these...
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