5 of the largest glaciers in the world

In the coldest and most remote parts of the world, far from people and cities, glaciers quietly shape our planet. These huge blocks of ice may not make news every day, but they play a big role in our climate. They affect sea levels and help scientists understand global warming. In Antarctica, five glaciers are especially important because of their size and impact. Here’s why these massive glaciers are so important.

Seller Glacier, located on Thurston Island in Antarctica, covers around 7,018 square kilometres. It's one of the largest glaciers in the area and plays a key role in the ice system of the Antarctic Peninsula. Scientists closely monitor it to study ice movement and the effects of rising global temperatures. The glacier is an important site for research on long-term climate change.

Thurston Glacier, also located on Thurston Island and extending into the Ellsworth Mountains, is known as the third-largest glacier in Antarctica. While its exact size isn't clearly recorded, its vast scale and location make it a significant part of the continent's ice system. Named after industrialist W. Harris Thurston, the glacier helps researchers understand how large glaciers affect sea levels and ice stability as the planet warms.

Alexander Island Glacier No. 1 spans about 4,766 square kilometres, making it one of the largest glaciers in the world. Found on Alexander Island, it flows into the Bach and Wilkins Ice Shelves and contributes ice to the Bellingshausen Sea. First documented during a Russian expedition, this glacier is closely monitored for signs of melting and movement, helping scientists track the wider effects of climate change in Antarctica.

Located near the first, Alexander Island Glacier No. 2 covers about 3,980 square kilometres. Though slightly smaller, it plays a crucial role in the region’s ice system. The glacier is affected by both changes in the atmosphere and ocean conditions, making it an important site for studying how Antarctica is responding to climate change. It’s part of a larger network of glaciers that help control the flow of ice across the continent.

The Mercator Ice Piedmont, located on Alexander Island, is different from typical glaciers. Instead of flowing through valleys, it spreads out broadly at the base of nearby mountains. Named after geographer Gerardus Mercator, it is one of the largest piedmont glaciers in mainland Antarctica. Researchers closely monitor it to see how it reacts to changing weather patterns, providing valuable insight into ice behaviour in the region.