Dead leaves are a common source of carbon that makes its way into the soil and then into the atmosphere.
Photo: © Shutterstock/Inga Nielsen


<< First < Previous Page 1 Page 2 Page 3 Page 4 Next > Last >>
Over the last 25 years, soil respiration has already increased by 1.2 per cent across the world. With most soils, more carbon is bound than released into the atmosphere. Continuing global warming could change this, US researchers warn.

The vast reservoir of carbon stored beneath our feet is entering Earth's atmosphere at an increasing rate, most likely as a result of warming temperatures, suggest observations collected by a team of US-scientists from a variety of the Earth's many ecosystems.

In a study published in Nature on the 2nd August, US scientists of the Pacific Northwest National Laboratory, Richland, and the University of Maryland show that this process is speeding up as Earth warms and is happening faster than plants are taking in carbon through photosynthesis. The team found that the rate at which microbes are transferring carbon from soil to the atmosphere has increased by 1.2 per cent over a 25-year period, from 1990 to 2014.

While that may not seem like a big change, such an increase on a global scale, in a relatively short period in Earth history, is massive. The finding, based on thousands of observations made by scientists at hundreds of sites around the globe, is consistent with the predictions that scientists have made about how Earth might respond to warmer temperatures.

Findings are based on studies from around the globe

"It's important to note that this is a finding based on observations in the real world.

<< First < Previous Page 1 Page 2 Page 3 Page 4 Next > Last >>