The air archive maintained by CSIRO started in 1978, and contains samples of clean air from a station at Cape Grim, Tasmania. It’s the oldest such archive in the world. Now with Allport’s tank, last used in 1970, the record has been extended further."Old air discovered"
The air contained traces of propellants, refrigerants and emissions form aluminium smelters. Paul Fraser, who leads CSIRO’s greenhouse gas research team says that the scuba tank is going to be really useful: “If tanks were filled in a clean coastal environment their usefulness in measuring greenhouse gases such as carbon dioxide, methane, nitrous oxide and chloro-flurocarbons (CFCs) is much broader,” he says.
David Pescovitz is Boing Boing's co-editor/managing partner. He's also a research director at Institute for the Future. On Instagram, he's @pesco.