Tag Archives: carbon cycle

How scientists predicted CO2 would breach 400ppm in 2016

thunderstorms on the brazilian horizon
Thunderstorms on the Brazilian Horizon. Credit: NASA

Prof Richard Betts is head of climate impacts research at the Met Office Hadley Centre and chair in climate impacts at the University of Exeter

November 8, 2016 — In the late 1950s, when David Keeling began measuring atmospheric CO2 concentration at the Mauna Loa observatory in Hawaii, the concentration was around 315 parts per million (ppm). In 2016, it topped 400ppm for the first time.  Continue reading How scientists predicted CO2 would breach 400ppm in 2016

Surge in plant growth explains slower CO2 rise over past decade

surge in plant growth
Credit: Jasmina007/iStock/Getty Images

It’s unequivocal that human activity is raising CO2 levels in the atmosphere. But since the start of the century, the level has stopped accelerating and has taken on more of a steady rise instead

November 8, 2016 — This is the conclusion of a new study published in Nature Communications that looks at the factors controlling how plants on land “breathe” CO2, causing the upward march in atmospheric CO2 to periodically speed up and slow down.  Continue reading Surge in plant growth explains slower CO2 rise over past decade