Scientists call for eight steps to increase soil carbon for climate action and food security

December 3, 2018, University of Vermont
Scientists call for 8 steps to increase global soil carbon for climate action and food security. Credit: S Malyon, CIAT. Link: flic.kr/p/zdGjBo

Leading scientists call for action to increase global soil carbon, in advance of the annual climate summit of the United Nations Framework Convention on Climate Change (UNFCCC) in Katowice, Poland (COP24) and World Soil Day (5 Dec).

The amount of carbon in soil is over twice the amount of carbon found in trees and other biomass.

But one-third of the world's soils are already degraded, limiting and adding almost 500 gigatons of carbon dioxide to the atmosphere, an amount equivalent to the carbon sequestered by 216 billion hectares of U.S. forest.

Modalities for in agriculture will be addressed 3 December at the first workshop of the Koronivia Joint Work on Agriculture, a breakthrough initiative of the 2017 UNFCCC negotiations.

In a commentary piece, Put More Carbon in Soils to Meet Paris Climate Pledges, published today by the journal Nature, and agricultural scientists who serve on the science and technical committee of the organization 4 per 1000 describe a path for recuperating soil carbon stocks to mitigate climate change and boost soil fertility. The scientists suggest that the KJWA formally commit to increasing global soil organic carbon stocks through coordination and activities related to eight steps.

The eight steps are:

1. Stop carbon loss - Protect peatlands through enforcement of regulations against burning and drainage.
2. Promote carbon uptake - Identify and promote best practices for storing carbon in ways suitable to local conditions, including through incorporating crop residues, cover crops, agroforestry, contour farming, terracing, nitrogen-fixing plants, and irrigation.
3. Monitor, report and verify impacts - Track and evaluate interventions with science-based harmonized protocols and standards.
4. Deploy technology - Use high-tech opportunities for faster, cheaper and more accurate monitoring of soil carbon changes.
5. Test strategies - Determine what works in local conditions by using models and a network of field sites.
6. Involve communities - Employ citizen science to collect data and create an open online platform for sharing.
7. Coordinate policies - Integrate soil carbon with national climate commitments to the Paris Agreement and other policies on soil and climate.
8. Provide support - Ensure technical assistance, incentives to farmers, monitoring systems, and carbon taxes to promote widespread implementation.

A joint forum for coordinated action and funding to close research gaps is needed, the scientists argue. The eight steps also inform the KJWA's next workshop (June 2019), which will address soil carbon.

"Taking steps to increase global soil carbon requires multi-stakeholder collaboration at the science-policy interface. 4p1000 initiative, which has 281 partners from 39 countries, is showing how such collaboration can be used to address in an integrated way," said Cornelia Rumpel, lead author of the commentary and Research Director of the National Research Center at France's Institute of Ecology and Environmental Sciences.

Co-author Farshad Amiraslani, Remote Sensing Specialist and Deputy Dean of Academic Affairs, Faculty of Geography, University of Tehran, is concerned with how lack of coordination among stakeholders and no comprehensive database is hindering the impact of land restoration efforts. We need to apply satellite imagery to capture changes occurring at large scales more frequently and cost-effectively, he said.

"We are amassing a rich body of knowledge on how to increase soil carbon stocks," said Claire Chenu, a Professor of Soil Sciences at AgroParisTech. "But further research is needed. For example, we know root systems make an important contribution to soil carbon stocks, but we are still researching how specific crops with deep roots, vs. cover crops, vs. agroforestry systems differentially contribute to increasing carbon. We need more data on the effects of agricultural practices in different ecosystems."

"Challenges to achieving large-scale sequestration include nutrient limits, inadequate farmer incentives and lack of organic matter in some places, but even impacts at lesser scales will benefit the climate and ," said co-author Lini Wollenberg, Low Emissions Development Leader for the CGIAR Research Program on Climate Change, Agriculture and Food Security (CCAFS) and Research Professor at the University of Vermont's Gund Institute for Environment.

"The potential benefits are too large to ignore," Wollenberg said.

Explore further: Historical climate important for soil responses to future climate change

More information: Cornelia Rumpel et al, Put more carbon in soils to meet Paris climate pledges, Nature (2018). DOI: 10.1038/d41586-018-07587-4

Related Stories

Major natural carbon sink may soon become carbon source

November 19, 2018

Until humans can find a way to geoengineer ourselves out of the climate disaster we've created, we must rely on natural carbon sinks, such as oceans and forests, to suck carbon dioxide out of the atmosphere. These ecosystems ...

Soil holds the secret to mitigating climate change

September 17, 2018

Food production doesn't have to be a victim of climate change. New research from Michigan State University suggests that crop yields and the global food supply chain can be preserved by harnessing the critical, and often ...

Soil modelling to help curb climate change

September 26, 2016

Soil is a major carbon pool, whose impact on climate change is still not fully understood. According to a recent study, however, soil carbon stocks and could be modelled more accurately by factoring in the impacts of both ...

Recommended for you

The long dry: global water supplies are shrinking

December 13, 2018

A global study has found a paradox: our water supplies are shrinking at the same time as climate change is generating more intense rain. And the culprit is the drying of soils, say researchers, pointing to a world where drought-like ...

New climate model to be built from the ground up

December 13, 2018

Facing the certainty of a changing climate coupled with the uncertainty that remains in predictions of how it will change, scientists and engineers from across the country are teaming up to build a new type of climate model ...

1 comment

Adjust slider to filter visible comments by rank

Display comments: newest first

Sibyl
1 / 5 (1) Dec 04, 2018
There is litttle the US can do to help reduce CO2 in the atmosphere. Most of the CO2 and methane are produce by third world and new industrial nations. The US has more trees now than it did before the civil war. But third world countries slash and burn to clear fields and put nutrients into the soil. Forest soils are almost sterile. My proposed solution is to decrease the number of third world farmers. "Soylient Green" would both decrease the number of farmers and replace the loss of farm products.

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.