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@geoengineering1

Dec 17

🚨Can land-based and ocean-based #CarbonRemoval work together, without undermining each other?

A new Earth system modeling study shows that combining BECCS & OAE delivers near-additive CO₂ removal, cutting ~23 ppm by 2100, while exposing critical Earth-system feedbacks.

🧵1/11

2/ As emissions cuts lag, most 1.5–2°C pathways now rely on carbon dioxide removal.

But the real question isn’t which CDR method is best, it’s what happens when multiple CDR approaches are deployed together inside the real climate system.

3/ To answer this, researchers used the Norwegian Earth System Model, simulating the period from 2030 to 2100 under an overshoot scenario where CO₂ first rises, then falls into net-negative territory.

This allowed them to track long-term land, ocean, and atm responses.

Read 12 tweets

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@geoengineering1

Dec 11

🚨'Rock candy' technique offers simpler, less costly way to capture C directly from air

U of Toronto engineers have developed a cheap, passive, string-based #DAC system that crystallizes CO₂ like “rock candy,” potentially cutting capital costs by up to 40%.

How it works🧵1/11

Direct air capture has existed for decades, but it’s expensive. Giant fans, complex chemical plants, and energy-intensive regeneration steps drive up costs. That’s the main criticism of today’s DAC industry.

U of Toronto researchers tackled the problem with a simple question:
What if we could let nature do most of the work?

Their answer: evaporative carbonate crystallization, a passive, wind-powered approach.

Read 12 tweets

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@geoengineering1

Dec 5

🚨🗞️Monthly Solar Geoengineering Updates (November Edition)

From the U.S. stratospheric-cooling patent to Global South funding, cautious UK–EU stances, tipping-point modeling & a surge in chemtrail chatter, #SRM captured global attention.

Top 10 SRM Highlights (Nov 2025)🧵1/6:

➡️@MakeSunsets secures its first US patent for stratospheric cooling tech

➡️Climate scientists remain skeptical of SRM, favor research over deployment, per @SZ (Garman newspaper) survey

➡️Royal Society sees SRM’s potential but stresses it can't solve climate change alone

🧵2/

➡️London Protocol reiterates precaution on marine geoengineering deployment

➡️UK reiterates it is “not in favor” of SRM deployment but open to debating regulation

➡️Studies warn SAI may cut protein in staple crops & destabilize yields for coffee, cacao & wine

🧵3/

Read 7 tweets

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@geoengineering1

Dec 3

🚨A new modeling study finds Stratospheric Aerosol Injection (#SAI) could lower risks to many of Earth’s #TippingPoints, but not all.

High-latitude deployment best protects ice sheets & permafrost, while low-latitude deployment favors rainforests & coral reefs.

DETAILS🧵1/14

2/ Tipping elements are highly sensitive to warming.

This study analyzes how different SAI designs (equatorial, mid-latitude, high-latitude & multi-objective strategy) influence the drivers of these tipping systems under SSP2-4.5.

3/ Across most tipping elements, SAI decreases risk relative to continued warming, but magnitude & direction of response are strongly pattern-dependent.

CO₂-driven warming & SAI-driven cooling aren't climatic mirror images - SAI can over- or under-compensate regional changes

Read 15 tweets

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@geoengineering1

Nov 26

🚨New study reveals a major hidden C sink in the deep ocean: ancient talus breccias - piles of broken basalt formed along seafloor faults - can trap & store CO₂ for tens of millions of years, potentially offsetting a significant share of mid-ocean ridge emissions.

DETAILS🧵1/10

2/ Researchers made the discovery while drilling 60-million-year-old seafloor in the South Atlantic.

They found talus breccias containing ~7.5 wt% CO₂ - the highest carbon content ever measured in upper ocean crust, up to *40 times richer than previously sampled basalts.

3/ Why so much C?

These breccias form when steep faults at slow-spreading ridges collapse, creating piles of fractured rock with high natural porosity (~19%).

Over millions of yrs, cold seawater circulates thru rubble & precipitates carbonate minerals, trapping dissolved CO₂

Read 11 tweets

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@geoengineering1

Nov 22

🚨Soil food webs boost carbon retention in farmlands

A new study reveals that simply returning crop residues to fields can supercharge soil food webs, enabling microbes, nematodes & fungi to lock significantly more photosynthetic C into farmland soils.

Details🧵1/8 #CarbonSink

2/ Researchers from the Institute of Applied Ecology, Chinese Academy of Sciences (CAS), used field trials and ¹³C isotope tracing to map how carbon fixed by crops travels into soil and through the soil food web.

3/ FINDINGS:

Returning crop residues (stover) emerged as a key driver:

It increased particulate organic carbon (POC) by ~30.96% & mineral-associated organic carbon (MAOC) by ~11.39% compared with plots where stover was removed.

Read 9 tweets

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