

Antarctic researchers can drill cores in the ice, and use these ice cores to find out how the climate has changed over time.
Ice cores contain traces of dust, gases, and chemicals from natural sources and human activities around the world, allowing researchers to study major environmental changes and variations in the chemistry and circulation of the atmosphere that occurred over months, years or millennia. (Photo by Tas van Ommen)
This story has been provided by Australian Government Antarctic Division. Learn more...
