Home Actualité internationale World News – GB – 2 ° C warming would release 230 billion tonnes of carbon from the soil • Terrecom
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World News – GB – 2 ° C warming would release 230 billion tonnes of carbon from the soil • Terrecom

An international team of scientists has determined that a global warming of two degrees Celsius would trigger the release of around 230 billion tonnes of carbon into the soil

An international team of scientists has determined that a global warming of two degrees Celsius will trigger the release of around 230 billion tonnes of carbon from the soil

The amount of carbon stored in the soil is two to three times the amount in the atmosphere As temperatures increase, the decomposition of the soil will be accelerated and the duration of organic carbon storage in the soil will be considerably reduced

The new research dramatically reduces the level of uncertainty about how future models of climate change will represent the sensitivity of soil carbon renewal

To put the scale of the results into perspective, 230 billion tonnes of carbon is more than four times China’s total emissions and more than double the United States’ emissions over the past century

« Our study excludes the most extreme projections – but nevertheless suggests substantial losses of carbon in soil due to climate change at a warming of only 2 ° C, and that does not even include losses of carbon from permafrost deeper, ”said study co-author Dr Sarah Chadburn from the University of Exeter

The link between climate change and soil carbon renewal is an example of a reinforcing or positive feedback loop Global warming will accelerate carbon loss and the subsequent increase in atmospheric CO2 levels will further accelerate global warming

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The loss of carbon from Earth’s soils represents one of the greatest areas of uncertainty when it comes to modeling the carbon cycle in climate change projections

To remedy this uncertainty, the researchers used a new combination of observational data and Earth system models

« We have studied the relationship between soil carbon and temperature at different places on Earth to determine its sensitivity to global warming, » said lead author of the study, Rebecca Varney.

While current models indicate an uncertainty of around 120 billion tonnes of carbon at an average global warming of 2 ° C, the new study reduces that uncertainty to around 50 billion tonnes of carbon

We have reduced the uncertainty in this response to climate change, which is essential for calculating an accurate global carbon budget and successfully meeting the Paris Agreement goals, ”said study co-author , Professor Peter Cox

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News from the world – GB – A warming of 2 ° C would release 230 billion tons of carbon in the soil • Terrecom
Related title :
Warming 2 C would release billions of tonnes of soil carbon
2 ° C warming would release 230 billion tonnes of soil carbon
New study reveals how dangerous 2 C could be dangerous for the Earth


SOURCE: https://www.w24news.com

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