#Carbon Sequestration

[soil-is-alive]

🌍 Soil: The Planet’s Biggest Carbon Sink 🌍

Did you know soil holds more carbon than the atmosphere and all plant life combined?

That’s over 2,300 billion tons quietly stored beneath our feet!

By keeping soils healthy through practices like cover cropping and no-till farming, we can preserve this natural carbon sink and support a more sustainable future.

Healthy soil, healthy planet. Let’s dig into solutions! 🌱

[rjzimmerman]

Research suggests Earth’s land absorbed almost no carbon last year (Heatmap AM)

This from Heatmap AM:

New preliminary findings from an international group of climate researchers found that, in 2023, the Earth’s land regions showed an “unprecedented weakening” in their ability to absorb carbon. Soil, grasslands, forests, and wetlands are some of the world’s greatest carbon sinks, helping to balance the climate. But last year, the hottest year on record, it looks as though they absorbed almost no carbon at all. The researchers say that if warming rates continue as they are, urgent action is needed “to enhance carbon sequestration and reduce greenhouse gasses emissions to net zero before reaching a dangerous level of warming at which natural CO2 sinks may no longer provide to humanity the mitigation service they have offered so far by absorbing half of human induced CO2 emissions.”

[farmerstrend]

1,300 Kenyan Farmers Graduate After Four Years of First-of-its-Kind Sustainable Agroforestry and Climate Action Training Program

Discover how over 1,300 farmers in Homa Bay, Kenya, are transforming their livelihoods and restoring the environment through Trees for the Future’s Forest Garden Program, a sustainable agroforestry initiative. Learn how agroforestry techniques like composting, crop rotation, and tree planting are empowering farmers in Kenya to combat climate change, increase food security, and boost…

[tenth-sentence]

In a general sense, such processes are referred to as carbon dioxide sequestration or mitigation (Fig. 8.17):

Geological sequestration – capture of carbon dioxide from the stack gases, and pumping it into 'safe' reservoirs on land or in the oceans

Biological sequestration – growing vegetation in quantities large enough to consume amounts of carbon dioxide equivalent to that released during energy consumption. The vegetation (biomass) that is produced can itself be used as a fuel, creating a closed production/consumption cycle.

"Environmental Chemistry: A Global Perspective", 4e - Gary W. VanLoon & Stephen J. Duffy

[probablyasocialecologist]

The vast majority of the environmental projects most frequently used to offset greenhouse gas emissions appear to have fundamental failings suggesting they cannot be relied upon to cut planet-heating emissions, according to a new analysis.

[...]

Overall, $1.16bn (£937m) of carbon credits have been traded so far from the projects classified by the investigation as likely junk or worthless; a further $400m of credits bought and sold were potentially junk.

[...]

“The ramifications of this analysis are huge, as it points to systemic failings of the voluntary market, providing additional evidence that junk carbon credits pervade the market,” said Anuradha Mittal, director of the Oakland Institute thinktank. “We cannot afford to waste any more time on false solutions. The issues are far-reaching and pervasive, extending well beyond specific verifiers. The [voluntary carbon market] is actively exacerbating the climate emergency.”

[phanerozoicfossilgardener]

Carbon sequestration is a good option for carbon neutrality and I will die on this hill

[prokyon]

Build Soil

You should check out BuildSoil's chestnuts project. Jordan is a soil scientist who is undertaking a project across North America to plant 1 million edible chestnut trees.

It's also Jordan's birthday today, and the project could really use some support!

buildsoil.net/donate http://venmo.com/buildsoil http://ko-fi.com/buildsoil

BuildSoil is a 501(c)(3) nonprofit and donations are tax-deductible.

[jcmarchi]

A carbon-lite atmosphere could be a sign of water and life on other terrestrial planets, MIT study finds

New Post has been published on https://thedigitalinsider.com/a-carbon-lite-atmosphere-could-be-a-sign-of-water-and-life-on-other-terrestrial-planets-mit-study-finds/

A carbon-lite atmosphere could be a sign of water and life on other terrestrial planets, MIT study finds

Scientists at MIT, the University of Birmingham, and elsewhere say that astronomers’ best chance of finding liquid water, and even life on other planets, is to look for the absence, rather than the presence, of a chemical feature in their atmospheres.

The researchers propose that if a terrestrial planet has substantially less carbon dioxide in its atmosphere compared to other planets in the same system, it could be a sign of liquid water — and possibly life — on that planet’s surface.

What’s more, this new signature is within the sights of NASA’s James Webb Space Telescope (JWST). While scientists have proposed other signs of habitability, those features are challenging if not impossible to measure with current technologies. The team says this new signature, of relatively depleted carbon dioxide, is the only sign of habitability that is detectable now.

“The Holy Grail in exoplanet science is to look for habitable worlds, and the presence of life, but all the features that have been talked about so far have been beyond the reach of the newest observatories,” says Julien de Wit, assistant professor of planetary sciences at MIT. “Now we have a way to find out if there’s liquid water on another planet. And it’s something we can get to in the next few years.”

The team’s findings appear today in Nature Astronomy. De Wit co-led the study with Amaury Triaud of the University of Birmingham in the UK. Their MIT co-authors include Benjamin Rackham, Prajwal Niraula, Ana Glidden Oliver Jagoutz, Matej Peč, Janusz Petkowski, and Sara Seager, along with Frieder Klein at the Woods Hole Oceanographic Institution (WHOI), Martin Turbet of Ècole Polytechnique in France, and Franck Selsis of the Laboratoire d’astrophysique de Bordeaux.

Beyond a glimmer

Astronomers have so far detected more than 5,200 worlds beyond our solar system. With current telescopes, astronomers can directly measure a planet’s distance to its star and the time it takes it to complete an orbit. Those measurements can help scientists infer whether a planet is within a habitable zone. But there’s been no way to directly confirm whether a planet is indeed habitable, meaning that liquid water exists on its surface.

Across our own solar system, scientists can detect the presence of liquid oceans by observing “glints” — flashes of sunlight that reflect off liquid surfaces. These glints, or specular reflections, have been observed, for instance, on Saturn’s largest moon, Titan, which helped to confirm the moon’s large lakes.

Detecting a similar glimmer in far-off planets, however, is out of reach with current technologies. But de Wit and his colleagues realized there’s another habitable feature close to home that could be detectable in distant worlds.

“An idea came to us, by looking at what’s going on with the terrestrial planets in our own system,” Triaud says.

Venus, Earth, and Mars share similarities, in that all three are rocky and inhabit a relatively temperate region with respect to the sun. Earth is the only planet among the trio that currently hosts liquid water. And the team noted another obvious distinction: Earth has significantly less carbon dioxide in its atmosphere.

“We assume that these planets were created in a similar fashion, and if we see one planet with much less carbon now, it must have gone somewhere,” Triaud says. “The only process that could remove that much carbon from an atmosphere is a strong water cycle involving oceans of liquid water.”

Indeed, the Earth’s oceans have played a major and sustained role in absorbing carbon dioxide. Over hundreds of millions of years, the oceans have taken up a huge amount of carbon dioxide, nearly equal to the amount that persists in Venus’ atmosphere today. This planetary-scale effect has left Earth’s atmosphere significantly depleted of carbon dioxide  compared to its planetary neighbors.

“On Earth, much of the atmospheric carbon dioxide has been sequestered in seawater and solid rock over geological timescales, which has helped to regulate climate and habitability for billions of years,” says study co-author Frieder Klein.

The team reasoned that if a similar depletion of carbon dioxide were detected in a far-off planet, relative to its neighbors, this would be a reliable signal of liquid oceans and life on its surface.

“After reviewing extensively the literature of many fields from biology, to chemistry, and even carbon sequestration in the context of climate change, we believe that indeed if we detect carbon depletion, it has a good chance of being a strong sign of liquid water and/or life,” de Wit says.

A roadmap to life

In their study, the team lays out a strategy for detecting habitable planets by searching for a signature of depleted carbon dioxide. Such a search would work best for “peas-in-a-pod” systems, in which multiple terrestrial planets, all about the same size, orbit relatively close to each other, similar to our own solar system. The first step the team proposes is to confirm that the planets have atmospheres, by simply looking for the presence of carbon dioxide, which is expected to dominate most planetary atmospheres.

“Carbon dioxide is a very strong absorber in the infrared, and can be easily detected in the atmospheres of exoplanets,” de Wit explains. “A signal of carbon dioxide can then reveal the presence of exoplanet atmospheres.”

Once astronomers determine that multiple planets in a system host atmospheres, they can move on to measure their carbon dioxide content, to see whether one planet has significantly less than the others. If so, the planet is likely habitable, meaning that it hosts significant bodies of liquid water on its surface.

But habitable conditions doesn’t necessarily mean that a planet is inhabited. To see whether life might actually exist, the team proposes that astronomers look for another feature in a planet’s atmosphere: ozone.

On Earth, the researchers note that plants and some microbes contribute to drawing carbon dioxide, although not nearly as much as the oceans. Nevertheless, as part of this process, the lifeforms emit oxygen, which reacts with the sun’s photons to transform into ozone — a molecule that is far easier to detect than oxygen itself.

The researchers say that if a planet’s atmosphere shows signs of both ozone and depleted carbon dioxide, it likely is a habitable, and inhabited world.

“If we see ozone, chances are pretty high that it’s connected to carbon dioxide being consumed by life,” Triaud says. “And if it’s life, it’s glorious life. It would not be just a few bacteria. It would be a planetary-scale biomass that’s able to process a huge amount of carbon, and interact with it.”

The team estimates that NASA’s James Webb Space Telescope would be able to measure carbon dioxide, and possibly ozone, in nearby, multiplanet systems such as TRAPPIST-1 — a seven-planet system that orbits a bright star, just 40 light years from Earth.

“TRAPPIST-1 is one of only a handful of systems where we could do terrestrial atmospheric studies with JWST,” de Wit says. “Now we have a roadmap for finding habitable planets. If we all work together, paradigm-shifting discoveries could be done within the next few years.”

[reasonsforhope]

"Marginal improvements to agricultural soils around the world would store enough carbon to keep the world within 1.5C of global heating, new research suggests.

Farming techniques that improve long-term fertility and yields can also help to store more carbon in soils but are often ignored in favor of intensive techniques using large amounts of artificial fertilizer, much of it wasted, that can increase greenhouse gas emissions.

Using better farming techniques to store 1 percent more carbon in about half of the world’s agricultural soils would be enough to absorb about 31 gigatons of carbon dioxide a year, according to new data. That amount is not far off the 32 gigaton gap between current planned emissions reduction globally per year and the amount of carbon that must be cut by 2030 to stay within 1.5C.

The estimates were carried out by Jacqueline McGlade, the former chief scientist at the UN environment program and former executive director of the European Environment Agency. She found that storing more carbon in the top 30 centimeters of agricultural soils would be feasible in many regions where soils are currently degraded.

McGlade now leads a commercial organization that sells soil data to farmers. Downforce Technologies uses publicly available global data, satellite images, and lidar to assess in detail how much carbon is stored in soils, which can now be done down to the level of individual fields.

“Outside the farming sector, people do not understand how important soils are to the climate,” said McGlade. “Changing farming could make soils carbon negative, making them absorb carbon, and reducing the cost of farming.”

She said farmers could face a short-term cost while they changed their methods, away from the overuse of artificial fertilizer, but after a transition period of two to three years their yields would improve and their soils would be much healthier...

Arable farmers could sequester more carbon within their soils by changing their crop rotation, planting cover crops such as clover, or using direct drilling, which allows crops to be planted without the need for ploughing. Livestock farmers could improve their soils by growing more native grasses.

Hedgerows also help to sequester carbon in the soil, because they have large underground networks of mycorrhizal fungi and microbes that can extend meters into the field. Farmers have spent decades removing hedgerows to make intensive farming easier, but restoring them, and maintaining existing hedgerows, would improve biodiversity, reduce the erosion of topsoil, and help to stop harmful agricultural runoff, which is a key polluter of rivers."

-via The Grist, July 8, 2023

[rjzimmerman]

Excerpt from this story from Grist:

A row of executives from grain-processing behemoth Archer Daniels Midland watched as Verlyn Rosenberger, 88, took the podium at a Decatur City Council meeting last week. It was the first meeting since she and the rest of her central Illinois community learned of a second leak at ADM’s carbon dioxide sequestration well beneath Lake Decatur, their primary source of drinking water. 

“Just because CO2 sequestration can be done doesn’t mean it should be done,” the retired elementary school teacher told the city council. “Pipes eventually leak.” 

ADM’s facility in central Illinois was the first permitted commercial carbon sequestration operation in the country, and it’s on the forefront of a booming, multibillion-dollar carbon capture and storage, or CCS, industry that promises to permanently sequester planet-warming carbon dioxide deep underground. 

The emerging technology has become a cornerstone of government strategies to slash fossil fuel emissions and meet climate goals. Meanwhile, the Biden administration’s signature climate legislation, the Inflation Reduction Act, has supercharged industry subsidies and tax credits and set off a CCS gold rush. 

There are now only four carbon sequestration wells operating in the United States — two each in Illinois and Indiana — but many more are on the way. Three proposed pipelines and 22 wells are up for review by state and federal regulators in Illinois, where the geography makes the landscape especially well suited for CCS. Nationwide, the U.S. Environmental Protection Agency is reviewing 150 different applications. 

But if CCS operations leak, they can pose significant risks to water resources. That’s because pressurized CO2 stored underground can escape or propel brine trapped in the saline reservoirs typically used for permanent storage. The leaks can lead to heavy metal contamination and potentially lower pH levels, all of which can make drinking water undrinkable. This is what bothers critics of carbon capture, who worry that it’s solving one problem by creating another.

In September, the public learned of a leak at ADM’s Decatur site after it was reported by E&E News, which covers energy and environmental issues. Additional testing mandated by the EPA turned up a second leak later that month. The EPA has confirmed these leaks posed no threat to water sources. Still, they raise concern about whether more leaks are likely, whether the public has any right to know when leaks occur, and if CCS technology is really a viable climate solution.

Officials with Chicago-based ADM spoke at the Decatur City Council meeting immediately after Rosenberger. They tried to assuage her concerns. “We simply wouldn’t do this if we didn’t believe that it was safe,” said Greg Webb, ADM’s vice president of state-government relations. 

[thoughtlessarse]

The world’s peatlands are “dangerously underprotected” despite the colossal amount of climate-heating carbon dioxide already being emitted due to their destruction, a study has warned. Peatlands occupy just 3% of all land, but contain more carbon than all of the world’s forests. However, farmers and miners are draining the peatlands, releasing so much CO2 that if they were a country, they would be the fourth biggest polluter in the world after China, the US and India. The first global assessment found that only 17% of the peatlands were within protected areas. This contrasted starkly with other valuable ecosystems such as tropical forests, where 38% were protected, and mangroves (42%). Protection was even lower than the 17% average in the three nations with the most peatlands: Canada, Russia and Indonesia. The US and Brazil completed the top five nations, which contained almost three-quarters of all peatlands, and had higher proportions in protected areas. But the researchers cautioned that protected status on a map did not always translate to strong protection on the ground.

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[wolfnowl]

This Startup Aims to Restore the Ocean’s Power to Store Carbon | Sustainable Brands

Interesting... 🌏

[probablyasocialecologist]

So we need to ask: Is there a form of massive carbon removal that could be put towards socially just ends, pulling carbon out of the atmosphere as a form of collective social good? Can it work as an outgrowth of energy democracy? For if such a collection of technologies, practices, and institutions can exist, we should try to build it. Notably, carbon removal at what I’ll call climate-significant scale should not be thought of as a magic wand to wipe carbon away either. For one thing, it will not compensate exactly for emissions. The ocean, for example, currently takes up close to half of the carbon humans emit, and it’s possible that if carbon was removed at large scale from the atmosphere, the oceans would then give off carbon, perhaps replacing half of the carbon that had been removed. The prospect of carbon removal is fraught with complexity, and even peril—all of which we have to talk about.

[delicatelysublimeforester]

Canada Extends Charitable Donation Deadline: A Critical Move in the Fight for Our Planet’s Future

In an act of rare urgency, the Government of Canada has extended the deadline for 2024 charitable donations to February 28, 2025, in response to a disruption caused by the four-week Canada Post service stoppage. The change, announced by Finance Minister Dominic LeBlanc and National Revenue Minister Élisabeth Brière, provides a critical lifeline to charities—many of which depend on year-end…