A new study published in Science has found that plants take in more carbon dioxide from the atmosphere but store it for a much shorter time than previously believed.
The study was conducted by an international team of scientists, led by Dr Heather Graven at the Imperial College London, using radiocarbon in the atmosphere between 1963 and 1967. The amount of radiocarbon (14C) in the atmosphere was relatively constant, thus forming a stable base for the team to study the Net Primary Productivity (NPP) of plants during this period. The goal was to understand how quickly carbon moves from the atmosphere to the vegetation and how long it stays in the plants before it is released back into the atmosphere.
The study has implications on the way we understand the role of plants in addressing climate change.
“Our study shows that more carbon than previously estimated is going into vegetation each year, but that the carbon in vegetation is not stored as long,” Dr Graven told WCRP. She added that together with other constraints like the available extent of land area, and that to address climate change, our focus needs to steadily remain on ramping down emissions from fossil fuels.
A new paper published by Ditlevsen and Ditlevsen in Nature Communications finds early warning signals of a critical transition of the AMOC system and suggests that it could shut down or collapse as early as 2025 and no later than 2095. For more information, click the heading above.
