Geoengineering Info Profile picture
Jun 11, 2023 9 tweets 7 min read Read on X
🚨📝NEW PAPER📝🚨

In a recently published paper, researchers use “an LCA approach to calculate the Long-Lasting #CarbonSequestration (LLCS) of #seaweed, which can be understood as the difference between #CarbonFixation & released C throughout the life cycle of seaweed.”

🧵1/9 ImageImage
Using kelp (Laminaria japonica) as an example of seaweed, the present study “validates the procedure of calculating the LLCS of seaweed throughout its whole life cycle in Ailian Bay from nursery to processing into #biochar (fertilizer) as the final product.”
2/9 Image
The results showed that “the #CarbonSequestration (full life cycle) of kelp in Ailian Bay was 97.73g C /m2/year.”
3/9 Image
#Biomass carbon accounts for approximately 86.15% of the total value (982.53 g C/m2/year) of carbon absorption source of #kelp in Ailian Bay, with the remaining 13.85% consisting of RDOC and sedimentary carbon.”
4/9 ImageImage
“The #CarbonFootprint of the kelp in Ailain Bay is -1146.8 tons of CO2 per year, and the negative value indicates that the #kelp in Ailian Bay can contribute 1146.8 tons of #CarbonSink per year.”
5/9
Moreover, scientists in this study calculated the amount of #biomass carbon that was #sequestrated by seaweed production in China from 2010 to 2020.
6/9
“If all seaweed #biomass carbon is permanently #sequestered the results of this study suggest that about 250,000 tons of CO2 could be fixed by Chinese seaweed
during this decade, which could reach 0.2% of China's peak carbon.”
7/9
Accordingly, the present research concludes that “the mass production of #seaweed can be utilized as an efficient method to #sequestrate carbon and a feasible method for evaluating the effect of kelp farms on climate change.”
8/9
🔗 Link to the paper entitled “Carbon sequestration assessment and analysis in the whole life cycle of seaweed” here ⬇️
iopscience.iop.org/article/10.108…

#CarbonSequestration
#Seaweed
#Kelp
#CarbonSink

9/9 Image

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More from @geoengineering1

Aug 1
🚨How does #SolarGeoengineering affect air pollution & public health?

New study using a cutting-edge Earth system model shows that #SAI has only modest effects on PM₂.₅ & ozone-related mortality & these impacts are mostly due to climate shifts, not aerosol deposition.🧵1/8 Image
2/ Using CESM2-WACCM6 simulations across three scenarios (SSP2-4.5 baseline, ARISE-SAI-1.5, ARISE-SAI-1.0), the study quantifies global mortality attributable to ozone (O₃) & fine particulate matter (PM₂.₅) under future SAI deployment targeting 1.5°C and 1.0°C warming levels.
3/ Findings:

In the ARISE-SAI-1.5 scenario, maintaining global mean temp at 1.5°C above pre-industrial levels via SAI results in:

- 1.26% reduction in ozone-related mortality

- 0.86% increase in PM₂.₅-related mortality during 2060–2069, relative to SSP2-4.5. Image
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Read 10 tweets
Jul 27
📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (21-27 July 2025):

🔗:

🧵0/22
Chestnut Carbon secured up to $210M in non-recourse financing, led by J.P. Morgan for its afforestation project, marking a first-of-its-kind deal in the US carbon removal space.


1/22carbonherald.com/chestnut-secur…
@MissionZeroTech won £6M from the UK government to advance design work for a DAC-enabled SAF plant in Cumbria, building on £1.38M in prior funding.


2/22missionzero.tech/lab-notes/uk-g…
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Jul 25
🚨Scientists have discovered a common soil bacterium, Bacillus megaterium, that can rapidly remove CO2 from the atmosphere by transforming it into solid limestone (calcium carbonate) within 24 hours, without creating toxic byproducts.
#CDR #CarbonMineralization

DETAILS🧵1/8 Image
2/ Microbially induced calcite precipitation (MICP) is a technique where microbes precipitate CaCO₃, often used in eco-friendly building materials.

Most MICP uses urease to break down urea, which produces ammonium, a problematic byproduct.
3/ Bacillus megaterium is unique in a sense, it contains both urease and carbonic anhydrase (CA) enzymes. The latter allows it to fix CO₂ directly without needing urea.

But which pathway dominates? This study investigated that. Image
Read 9 tweets
Jul 22
🚨🗓Carbon Removal Events🗓🚨

Here's a list of what's coming up this week (22 July - 28 July 2025) in the field of #CarbonDioxideRemoval:

🔗:

🧵1/11 teamup.com/kshqbfhrqkw36s…Image
EVENT—Food, Ag & Regen Farming + Biotech & Life Sciences Call by 4WARD

🗓23 July 2025 | Online
🔗

2/11circle.4ward.earth/c/events/food-…
EVENT—The Future of Carbon: Technology vs. Nature-based Solutions by Centre for Climate and Business Solutions

🗓23 July 2025 | British Columbia
🔗

3/11lu.ma/gk1jsg18
Read 12 tweets
Jul 21
🚨Solar Geoengineering (#SRM) may seem cheap (~$18B/yr) to cool the planet, but when you factor in societal risks, political instability & sudden climate rebounds, the true cost may far exceed technical estimates from both moral & practical standpoints, says a new study.

🧵1/11 Image
2/ SRM often gets touted as cheap even “pennies per ton” compared to the hundreds of $/ton needed for large-scale CDR.

But these estimates usually ignore the real-world costs of deploying SRM in a politically fractured and climate-damaged world.
3/ The authors outline four cost domains that traditional SRM estimates often miss:

1️⃣ Compensation for harms
2️⃣ International coordination
3️⃣ Domestic political feasibility
4⃣ Termination Shock

Each could add major financial & political costs. Details below: Image
Read 12 tweets
Jul 20
📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (14-20 July 2025):

🔗:

🧵0/23
Frontier facilitated $1.75M in CDR purchases from Karbonetiq, Limenet & pHathom for buyers including Stripe, Shopify & Google.


1/23frontierclimate.com/writing/summer…
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Read 25 tweets

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