Take a step-by-step walkthrough of how their solution works in a 🧵 below ⬇️
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1️⃣ "@ebbcarbon with aquaculture farms, desalination plants, ocean research labs, and other industrial sites that process seawater."
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2️⃣ "Ebb intercepts existing salt water flows at the facility and processes the water before it returns to the ocean."
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3️⃣ "Using low carbon electricity, Ebb run the salt water through a stack of ion-selective membranes that separate it into acidic and alkaline solutions."
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4️⃣ "Ebb measure and monitor the pH level and volume of the alkalinity we produce in real time. This enables us to safely return it at levels within the ocean's natural pH variance."
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5️⃣ "Ebb return the alkaline solution to the sea, where it immediately lowers the acidity of the sea water locally."
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6️⃣ "Over weeks to months, the alkaline solution reacts with dissolved CO2 in seawater to create bicarbonate (HCO3), a stable form of carbon storage for 10,000+ years."
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7️⃣ "With more CO2 locked away as bicarbonate, the ocean will naturally equilibrate and sequester more CO2 from the air. Ebb measures the CO2 removed from the air using sensors in the water and ocean and carbonate chemistry models."
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8️⃣ "By partnering with the ocean, Ebb Carbon has the potential to be one of the most energy efficient and cost effective ways to reverse the impacts of climate change both locally and globally."
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New study suggests that during the Emeishan supervolcanic eruptions (~260M yrs ago), enhanced weathering of uplifted rocks removed huge amounts of atm CO₂, cutting levels nearly in half.
How?🧵1/11
2/ Large igneous provinces (LIPs) are among the largest volcanic events in Earth’s history, typically releasing huge volumes of lava over 1-5 million years.
They’re widely thought to drive CO₂ spikes, warming, and environmental crises through massive volcanic degassing.
3/ To test this assumption, researchers reconstructed atmospheric CO₂ levels across the Emeishan volcanic episode using carbon isotopes from chlorophyll-derived biomarkers preserved in marine sediments from the Shangsi section in China.
🚨How much does the shape of particles matter for #SolarGeoengineering?
A new study tests whether non-spherical particles could improve the cooling efficiency of #SAI.
The result: shape can help slightly, but particle size & refractive index dominate the cooling effect.🧵1/11
2/ SAI aims to cool Earth by injecting particles into the lower stratosphere that scatter incoming sunlight back to space, increasing planetary reflectivity (albedo).
The effectiveness of these particles depends on their optical properties, how they scatter and absorb sunlight.
3/ Most previous studies optimized SAI particles assuming they're perfect spheres, focusing on 2 parameters: particle radius & refractive index.
But real particles in the atm are often irregular or elongated, raising an imp Q: could particle shape improve solar reflection?
1️⃣ Solar geoengineering governance platform - A new SGRG initiative will develop transparency tools, disclosure systems and a research governance charter as SRM studies expand.
2️⃣ AMOC tipping warning & role of SRM - Nordic Council report highlights risks of an Atlantic circulation collapse and urges stronger monitoring and expanded research into climate intervention alongside emissions cuts.
🚨🐜Tiny fungus-farming ants have evolved the ability to capture carbon dioxide from air (#CDR) and convert it into a mineral layer on their bodies, forming a natural protective armour, a surprising biological mechanism reported by scientists in a new study.
Details🧵1/11
2/ The discovery comes from studying crowded ant nests where carbon dioxide can build up.
Instead of simply tolerating high CO₂, these ants appear to use the gas as a chemical resource inside their nest environment.
3/ Fungus-farming ants forage for vegetation to feed cultivated fungi that are grown inside their colonies. In turn, the fungi serve as the primary food source for the ants.
The high density of ants and fungi can result in high concentrations of CO2 inside the nests.
From Oxford lectures & London policy debates to GeoMIP in Tokyo, #SRM governance forums in Belgium & major gatherings across Vienna, US & beyond + key job & abstract deadlines. Here’s what’s coming up🧵1/22
🚨A new study finds that most enhanced weathering models overestimate CO₂ removal (#CDR) because they assume all added rock powder reacts, when in reality, soil structure & moisture mean much of the mineral surface never gets wet, cutting reaction rates by up to 97%.
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2/ Enhanced weathering (EW) works by spreading finely ground silicate rocks onto soils. When these minerals react with water and CO₂, they form bicarbonate, effectively removing carbon from the atmosphere.
But here’s the catch: no water contact, no reaction.
3/ Most large-scale CDR models assume that once rock powder is added to soil, its surface is “available” for reaction.
In reality, soils are complex porous systems. H2O does not evenly coat every particle.
So, this study asks: How much of the rock surface is actually wet