Atmospheric data gathered by the NASA satellite OCO-2 has revealed that certain tropical regions are responsible for an unprecedented spike in CO2 levels in 2015 and 2016
Credit: NASA

Since the Industrial Revolution in the early 1800s, atmospheric carbon dioxide (CO2) concentrations have been steadily increasing, but 2015 and 2016 saw an unprecedented spike. A NASA study has now analyzed data gathered by the atmosphere-monitoring satellite, the Orbiting Carbon Observatory-2 (OCO-2), over more than two years and pinpointed the cause: the El Nino weather effect caused certain tropical regions to release far more CO2 than they normally would.

Although there’s been some huge efforts to reduce the amount of CO2 produced through human activity, the amount of the gas pumped into the atmosphere has still increased by an average of 2 parts per million (about 4 gigatons of carbon) annually, in recent years. But 2015 and 2016 broke the trend with the largest spikes on record: up to 3 parts per million, amounting to 6.3 gigatons of carbon. Emissions from human activity stayed […]

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