Geoengineering Info Profile picture
May 9, 2023 8 tweets 6 min read Read on X
🚨🌊NEW PAPER 🌊🚨

"One of the planet’s most vital #CarbonSinks i.e. SOUTHERN OCEAN (SO) (absorbs ~40% of C) is revealing its secrets as tiny organisms in the SO play an outsized role in moderating Earth’s #climate."

Details from the recent research are discussed in a🧵⬇️
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"Based on 107 independent observations of the seasonal cycle from 63 #biogeochemical profiling floats, new study conducted by scientists from #NOAA & University of Hawai'i provide the basin-scale estimate of distinct biogenic #CarbonPool production at Southern Ocean."
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Researchers find "significant meridional variability with enhanced #ParticulateOrganicCarbon production in the subantarctic & polar Antarctic sectors & enhanced #DissolvedOrganicCarbon production in the subtropical & sea-ice-dominated sectors."
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"#ParticulateInorganicCarbon production peaks between 47°S and 57°S near the “great calcite belt.” Relative to an abiotic Southern Ocean (SO), organic C production enhances CO2 uptake by 2.80 ± 0.28 Pg C y−1, while PIC production reduces CO2 uptake by 0.27 ± 0.21 Pg C y−1."
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"Without organic C production, the SO would be a CO2 source to the atm. The findings of this study emphasize the importance of #DOC & #PIC production, in addition to the well-recognized role of #POC production, in shaping the influence of C export on air–sea CO2 exchange."
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IN SIMPLE WORDS ⬇️
🌊 "Researchers discovered that if the amount of #carbon produced by tiny organisms in Southern Ocean decreased by 30%, the Southern Ocean would release carbon dioxide instead of #absorbing it, which could worsen the #GreenhouseEffect on our planet."
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Read the open-access paper entitled: "Biogenic carbon pool production maintains the Southern Ocean carbon sink" here ⬇️
pnas.org/doi/10.1073/pn…

#CarbonSink

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More from @geoengineering1

Aug 27
🚨In a new study published in @OneEarth_CP, researchers reveal that human land activities have stripped away roughly 24% of terrestrial carbon stocks (equivalent to 344 billion metric tons of C), underscoring an urgent need to reframe land-use & climate policy.

Details🧵1/10 Image
2/ Plants + soils store more carbon than the atmosphere + all fossil reserves combined.

But farming, grazing, and forest use have stripped away this natural shield, turning land from a carbon bank into a carbon source.
3/ Researchers call this loss the terrestrial carbon deficit - the gap between what ecosystems could hold (‘potential’) vs. what they actually hold (‘actual’).

The shortfall? 344 PgC (24% of natural stocks). Image
Read 11 tweets
Aug 22
🚨Can aeosols counter AMOC collapse?

A NEW study suggests Stratospheric Aerosol Injection (#SAI) could help prevent the decline of the Atlantic Meridional Overturning Circulation (#AMOC), but only if aerosols are injected in the appropriate latitude & hemisphere.

DETAILS🧵1/12 Image
2/ The AMOC is a key component of Earth’s climate system, transporting heat and nutrients across the Atlantic.

Its decline, already underway, is projected to accelerate under global warming, possibly approaching a tipping point this century. Image
3/ Using CESM2(WACCM6), Bednarz et al. ran sensitivity experiments with SO₂ injections at latitudes from 45°S to 45°N.

Each scenario injected 12 Tg-SO₂/yr (2035–2069) to test how SAI location affects AMOC stability.
Read 13 tweets
Aug 21
🚨Enhanced Rock Weathering (#ERW) could remove up to 700 Mt CO₂ by 2070 in the UK if quarry production scales 5–10×.

Larger extraction sites boost efficiency but raise major social, logistical & policy challenges.

A new @CommsEarth study models the trade-offs.🧵1/11 Image
2/ ERW involves spreading crushed silicate rocks on croplands to capture CO₂.

While previous studies examined its chemistry & agronomic benefits, this work focuses on the supply chain: can the UK sustainably scale rock extraction to meet net-zero needs?
3/ The authors model deployment from 2025–2070 under 3 supply scenarios:

Low (32 Mt rock/yr), medium (97 Mt rock/yr) & high rock (166 Mt rock/yr) demand with variations in whether expansion relies on active, inactive, or new quarries. Image
Read 12 tweets
Aug 17
📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (11 August - 17 August 2025):

🔗:

🧵0/19
Carbon removal company @equatic_tech raised $11.6M Series A led by Temasek Trust’s Catalytic Capital and Kibo Invest.

1/19
eco-business.com/press-releases…
Gevo, a US-based sustainable aviation fuel producer, generated $1 million in revenue from selling BECCS credits during the second quarter.


2/19qcintel.com/carbon/article…
Read 21 tweets
Aug 13
🚨A new CSIRO-led study finds Australia can achieve net-zero emissions cost-effectively by 2050 if it acts early.

Rapid decarbonisation of electricity, scaled #CarbonRemoval, and strategic land offsets are central to success.

Details🧵1/9 Image
2/ The research adapts the IEA’s global net-zero scenarios to Australia’s economy using an integrated economic–energy model.

It compares a Rapid Decarbonisation pathway, consistent with limiting warming to 1.5 °C, with a Stated Policies path leading to ~2.6 °C by 2100. Image
3/ Electricity emerges as cornerstone. In rapid pathway, coal is 85% retired by 2030 & fully phased out by 2035.

Renewables supply ~90% of generation by 2030, cutting emissions intensity to ~15% of 2020 levels & enabling deeper decarbonisation across various sectors. Image
Read 10 tweets
Aug 10
📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (04 August - 10 August 2025):

🔗:

🧵0/18
Evero’s Ince biomass plant will be converted into the UK’s first BECCS site by 2029, capturing 217,000 t CO₂/year, processing 170,000 t waste wood, and powering 100,000+ homes.

1/18
bioenergy-news.com/news/evero-bio…
Ottawa-based DAC developer Terrafixing secured $1.8M from the Canadian government.


2/18carbon-pulse.com/424910/
Read 20 tweets

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