Man made global warming started earlier and was much greater in the 19th century than previously thought according to two new papers involving international scientists and US space agency NASA.

Research published in Nature today (Thursday) led by Australian National University Professor Nerilie Abram concludes the warming of the planet may have started as early as 1830.

A separate NASA paper claims historic temperature records had missed up to one­fifth of early warming.

Drawing on a roughly 500-year history of temperatures in the oceans and on land, a group of international scientists led by ANU said the climate response to carbon dioxide emissions from the industrial revolution had started much earlier than typical climate change graphs predict.

“It tells us that our climate system is able to respond relatively quickly to greenhouse gases, at least in some areas,” Professor Abram said.

Source: The Australian