Around 700 million years ago, the Earth witnessed an ice age that turned it into a colossal snowball.
Now, Australian scientists at the University of Sydney have come up with a fascinating explanation for what triggered and prolonged this frigid period.
In a study recently published in the scientific journal Geology, geologists from the University of Sydney point out that historically low volcanic emissions of carbon dioxide, combined with the weathering of an extensive pile of volcanic rocks in what is now Canada, were mainly responsible for the extremely cold climate during this ice age.
Predicting the planet’s climate future
Dr. Adriana Dutkiewicz, lead author of the study and future ARC fellow, illustrates:
“Imagine the Earth almost completely frozen. Now let’s think we’ve solved the mystery: historically low volcanic carbon dioxide emissions, aided by the weathering of a large pile of volcanic rocks in what is now Canada; a process that absorbs atmospheric carbon dioxide”, explains the scientist.
The study not only provides a convincing explanation for the onset of Ice age known as the Sturtian, which occurred between 717 and 660 million years ago, but also sheds light on why this ice age persisted for a staggering 57 million years.
Dr. Adriana Dutkiewicz on a volcanic rock – Image: Professor Dietmar Müller/University of Sydney/Reproduction
According to study co-author Professor Dietmar Müller, understanding the conditions that triggered the prehistoric ice age helps us understand how the planet functions with a climate system complex.
Furthermore, it paves the way for speculation about the future, including the possibility of a new Pangea and its implications for life on Earth.
Ultimately, the study not only gives us a fascinating insight into Earth’s remote past, but also warns us about the challenges and transformations that could shape the future.
Understanding these processes is crucial for us to take measures that guarantee the sustainability and preservation of our planet for future generations.
