Global Warming

Global Warming can Change Organic Matter in Soil

In a new research, scientists at the University of Toronto Scarborough (UTSC), Canada, have shown that global warming can actually change the molecular structure of organic matter in soil. “Soil contains more than twice the amount of carbon than does the atmosphere, yet, until now, scientists haven’t examined this significant carbon pool closely,” said Myrna [...]

In a new research, scientists at the University of Toronto Scarborough (UTSC), Canada, have shown that global warming can actually change the molecular structure of organic matter in soil.

“Soil contains more than twice the amount of carbon than does the atmosphere, yet, until now, scientists haven’t examined this significant carbon pool closely,” said Myrna J. Simpson, principal investigator and Associate Professor of Environmental Chemistry at UTSC.

“Through our research, we’ve sought to determine what soils are made up of at the molecular level and whether this composition will change in a warmer world,” she added.

Soil organic matter is what makes dirt fertile and able to support plant life – both of which are especially important for agriculture. Organic matter retains water in the soil and prevents erosion.

Natural processes of decomposition of soil organic matter provide plants and microbes with the energy source and water they need to grow, and carbon is released into the atmosphere as a by-product of this process.

Warming temperatures are expected to speed up this process, which will increase the amount of CO2 that is transferred to the atmosphere.

“From the perspective of agriculture, we can’t afford to lose carbon from the soil because it will change soil fertility and enhance erosion,” said Simpson.

“Alternatively, consider all the carbon locked up in permafrost in the Arctic. We also need to understand what will happen to the stored carbon when microbes become more active under warmer temperatures,” she added.