Transition Brockville archive

Tag : Carbon sequestration (5)

Rock dust on fields could remove vast amounts of CO2

The Guardian / Damian Carrington / 8 July 2020

Spreading rock dust on farmland could suck billions of tonnes of carbon dioxide from the air every year, according to the first detailed global analysis of the technique.

The chemical reactions that degrade the rock particles lock the greenhouse gas into carbonates within months, and some scientists say this approach may be the best near-term way of removing CO2 from the atmosphere.

The researchers are clear that cutting the fossil fuel burning that releases CO2 is the most important action needed to tackle the climate emergency. But climate scientists also agree that, in addition, massive amounts of CO2 need to be removed from the air to meet the Paris agreement goals of keeping global temperature rise below 2C.

[ FULL ARTICLE ]

Organic farming and climate change

Homestead Organics / Tom Manley / 20 October 2017

Changes in soil organic carbon (SOC) stocks significantly influence the atmospheric carbon dioxide (CO2) concentration. According to a study published by the National Academy of Sciences, agriculture is one of the main causes of the depletion of carbon in the soil and the increased presence of carbon in our atmosphere.

In September 2017, a new study, implemented by the Northeastern University and the Organic Center, demonstrates that organic agricultural practices build healthy soils and can be a part of the solution in the fight of global warming.

To evaluate how organic farming affects the soils ability to capture carbon and keep it out of the atmosphere, the study measured over 1000 soil samples (conventional and organic soils) from across the United States. One of its most compelling findings is that on average, organic farmers have 44% higher levels of humic acids – substances of soils that sequester carbon over the long term compared to soils not managed organically.

[ TOC PRESS RELEASE ]

We’re treating soil like dirt. It’s a fatal mistake.

The Guardian / George Monbiot / 25 March 2015

Tractor-ploughingThis is what topples civilisations. War and pestilence might kill large numbers of people, but in most cases the population recovers. But lose the soil and everything goes with it.

Now, globalisation ensures that this disaster is reproduced everywhere. In its early stages, globalisation enhances resilience: people are no longer dependent on the vagaries of local production. But as it proceeds, spreading the same destructive processes to all corners of the Earth, it undermines resilience, as it threatens to bring down systems everywhere.

Almost all other issues are superficial by comparison. What appear to be great crises are slight and evanescent when held up against the steady trickling away of our subsistence.

The avoidance of this issue is perhaps the greatest social silence of all. Our insulation from the forces of nature has encouraged a belief in the dematerialisation of our lives, as if we no longer subsist on food and water, but on bits and bytes. This is a belief that can be entertained only by people who have never experienced serious hardship, and who are therefore unaware of the contingency of existence.

It’s not as if we are short of solutions.

[ FULL ARTICLE ]

Land, ocean carbon sinks weakening, making climate action urgent

Climate Progress / Joe Romm / 12 March 2015

Siberian craterWe are destroying nature’s ability to help us stave off catastrophic climate change. That’s the bombshell conclusion of an under-reported 2014 study, The declining uptake rate of atmospheric CO2 by land and ocean sinks, as coauthor Dr. Josep (Pep) Canadell recently explained to me.

Based on actual observations and measurements, the world’s top carbon-cycle experts have determined that the land and ocean are becoming steadily less effective at removing excess carbon dioxide from the atmosphere. This makes it more urgent for us to start cutting carbon pollution ASAP, since it will become progressively harder and harder for us to do so effectively in the coming decades.

[ FULL ARTICLE ]

Warming oceans less able to store organic carbon, study suggests

The Carbon Brief / Robert McSweeney / 06 January 2015

Ocean silt measurementThe oceans’ ability to store carbon may be reduced by global warming, a new study suggests. The research finds that warmer ocean temperatures limit how much organic carbon is being transported into the deep ocean.

This could cause a positive feedback loop, the authors suggest, with carbon storage in the oceans reducing as global temperatures rise further.

The Intergovernmental Panel on Climate Change estimates that since the 1970s, oceans have taken up more than 90 per cent of the heat trapped by greenhouse gases. A warming ocean has implications for sea level rise, but also for its ability to store organic carbon, a new study in Proceedings of the National Academy of Sciences finds.

[ FULL ARTICLE ]

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The Transition Framework

The Transition Towns movement aims toward veering away from excessive consumption – to deal with the conjoined problems of peak oil and climate change – but also in the belief that we may create an essentially more contented society, through building strong and resilient local communities. We will get to know our neighbours better, because we shall all need one another in the time to come.

— Chris Rhodes, Resource Insights (03 June 2013)
TB Projects

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