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
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
The results showed that “the #CarbonSequestration (full life cycle) of kelp in Ailian Bay was 97.73g C /m2/year.” 3/9
“#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
“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.”
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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.”
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🔗 Link to the paper entitled “Carbon sequestration assessment and analysis in the whole life cycle of seaweed” here ⬇️ iopscience.iop.org/article/10.108…
From U.S. withdrawal from global climate bodies & anti-geoengineering bills, to SAI uncertainty tool, Arctic field trials & funding calls, SRM stayed at the nexus of sci & geopolitics.
Top 10 SRM Highlights (Jan'26)🧵1/11
1️⃣ 𝗨.𝗦. 𝗲𝘅𝗶𝘁𝘀 𝗨𝗡𝗙𝗖𝗖𝗖 & 𝗜𝗣𝗖𝗖 - Experts warn withdrawal could weaken SRM governance, deepen geopolitical mistrust, and accelerate fragmented or unilateral approaches.
2/11
2️⃣ 𝗔𝗻𝘁𝗶-𝗴𝗲𝗼𝗲𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 𝗯𝗶𝗹𝗹𝘀 𝗶𝗻 𝘁𝗵𝗲 𝗨.𝗦. - New Arizona and Iowa state proposals target geoengineering, despite limited evidence and no active SRM programs.
🚨Climate pathways to 1.5°C increasingly depend on land-intensive carbon dioxide removal (#CDR) like forestation and BECCS.
But new research shows these climate solutions could place major pressure on #biodiversity if deployed without safeguards.
Details🧵1/11
2/ Using five integrated assessment models, the study examines where large-scale CDR is projected to occur & and how often it overlaps with biodiversity hotspots and climate refugia, the places most critical for species survival.
3/ The analysis focuses on a moderate but realistic deployment level of 6 GtCO₂ per year:
• 3 GtCO₂/yr from forestation
• 3 GtCO₂/yr from BECCS
Even at this level, land pressures are already significant.
🚨The Politics of Geoengineering (book) is out, offering 1st comprehensive social science view of #geoengineering.
It examines political, legal, economic & societal dimensions of CDR & SRM, from Africa to the Asia-Pacific, amid urgent governance & ethical debates
Chapters🧵1/15
2/ Chapter 01: Geoengineering has shifted from theory to contested policy, with technology outpacing governance. The analysis highlights political, legal, economic, and justice dimensions and calls for urgent global oversight.
3/ Chapter 2 examines Carbon Dioxide Removal (CDR) as geoengineering, analyzing CO2 extraction, storage, and conversion, with SWOT insights on techniques and implications for sustainable climate action.
🚨Is carbon dioxide removal (#CDR) in the Arctic really feasible?
A new peer-reviewed study systematically assessed proposed Arctic CDR pathways and finds that feasibility is far more limited than often assumed.
DETAILS🧵1/14
2/ As Arctic warms rapidly (4x) & attracts attention for climate interventions, can it host CDR at meaningful scale?
To answer this, authors conducted a comparative assessment of major CDR approaches proposed for Arctic regions, spanning both nature-based & engineered methods.
3/ The analysis draws on existing empirical studies, pilot projects, and modeling literature, evaluating each CDR pathway against biophysical constraints, technical readiness, environmental risks, and governance requirements.
🚨2025 Year in Review: Solar Geoengineering Edition🚨
As we enter 2026, we’re excited to share our yearly summary for #SRM: "Solar Geoengineering in 2025: Rays of Hope, Clouds of Doubt."
Here’s what we cover in this comprehensive review:🧵1/11
2/ 𝐖𝐡𝐚𝐭’𝐬 𝐢𝐧𝐜𝐥𝐮𝐝𝐞𝐝 𝐢𝐧 𝐨𝐮𝐫 𝟐𝟎𝟐5 𝐫𝐞𝐯𝐢𝐞𝐰?
1️⃣ Rising Temp & Escalating Climate Impacts
2️⃣SRM Funding Announcements
3️⃣Top SRM Stories
4️⃣Restrictions & Bans on SRM
5️⃣Essential SRM Reads
6️⃣SRM in Media
7️⃣Research Highlights
8️⃣Our Work Across Geoengineering
3/ 2025 was the third-warmest yr on record. @CopernicusEU shows the last 11 yrs were the warmest ever, with the global average temp in yrs 2023-25 exceeding 1.5 °C. Top climate disasters caused $120B+ in losses, intensifying debates over mitigation, CDR & SRM.