Antarctica: The beating heart of the planet
Antarctica is a vast expanse of sweeping ice, towering glaciers, and endless skies that shimmer in blues and whites.
It’s home to emperor penguins, seals, and seabirds, each thriving in a landscape both harsh and extraordinary.
Murdoch University oceanographer Professor Jennifer Verduin says her visit to Antarctica as part of the Homeward Bound program revealed the deep interconnections that bind our world, leaving her “both inspired and deeply saddened” by the fragility of this unique environment.
“While wildlife is slowly recovering, these species now face a new threat: climate change, with rising ocean temperatures melting ice, reshaping habitats, and disrupting the delicate balance of life.”
Professor Jennifer Verduin
Murdoch University oceanographer
The beating heart
Antarctic sea ice pulses with the seasons, expanding in Winter and retreating in Summer, but rising temperatures from global warming upset this beating rhythm, melting more ice than can refreeze.
Credit: John Nelson
Credit: John Nelson
Warmer ocean currents melt ice shelves from below, while warmer air temperatures cause surface melting and glacier breakdown.
As reflective ice turns into dark ocean water, it absorbs heat and continues a feedback loop.
While iceberg calving is natural, scientists warn that the rate of ice loss across Antarctica is increasing due to climate change.
The pulse of Antarctic life
This melting ice threatens the intricate ecosystems that support wildlife.
Krill, a primary food source for penguins, seals, and whales, could decline by over 40% by the end of the century, threatening the entire food web.
For example, research shows that 98% of emperor penguin colonies may become extinct by 2100 if carbon emissions continue at current rates.
The ripple effect
However, the effects extend far beyond Antarctica’s wildlife.
“Rising sea levels due to melting Antarctic ice is one of the greatest climate-related threats faced by humans today."
The Intergovernmental Panel on Climate Change predicts sea levels could rise 28–55 cm by the end of the century, enough to displace roughly 230 million people living within three feet of the high tide line today.
The Antarctic and Southern Ocean Coalition, say rising sea water will cause “contaminated freshwater, farmland inundated with saltwater, and flooded homes.”
As ice shifts, Antarctica reminds us that we are all connected to its future.
