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Feb 6 โ€ข 12 tweets โ€ข 4 min read โ€ข Read on X
๐Ÿšจ๐Ÿ—ž๏ธMonthly #SolarGeoengineering Updates (Jan 2026)๐Ÿ—ž๏ธ๐Ÿšจ

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)๐Ÿงต1/11 Image
1๏ธโƒฃ ๐—จ.๐—ฆ. ๐—ฒ๐˜…๐—ถ๐˜๐˜€ ๐—จ๐—ก๐—™๐—–๐—–๐—– & ๐—œ๐—ฃ๐—–๐—– - Experts warn withdrawal could weaken SRM governance, deepen geopolitical mistrust, and accelerate fragmented or unilateral approaches.

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2๏ธโƒฃ ๐—”๐—ป๐˜๐—ถ-๐—ด๐—ฒ๐—ผ๐—ฒ๐—ป๐—ด๐—ถ๐—ป๐—ฒ๐—ฒ๐—ฟ๐—ถ๐—ป๐—ด ๐—ฏ๐—ถ๐—น๐—น๐˜€ ๐—ถ๐—ป ๐˜๐—ต๐—ฒ ๐—จ.๐—ฆ. - New Arizona and Iowa state proposals target geoengineering, despite limited evidence and no active SRM programs.

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3๏ธโƒฃ ๐—ฆ๐—ฅ๐—  ๐—ฎ๐˜€ ๐—ฎ๐—ป โ€œ๐—ฒ๐—บ๐—ฒ๐—ฟ๐—ด๐—ฒ๐—ป๐—ฐ๐˜† ๐˜๐—ผ๐—ผ๐—น๐—ธ๐—ถ๐˜โ€ - University of Exeter, Cornwall warns declining aerosol cooling may push warming to 2ยฐC pre-2050, calling for SRM research alongside mitigation and CDR.

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4๏ธโƒฃ ๐—ฆ๐—”๐—œ ๐—จ๐—ป๐—ฐ๐—ฒ๐—ฟ๐˜๐—ฎ๐—ถ๐—ป๐˜๐˜† ๐——๐—ฎ๐˜๐—ฎ๐—ฏ๐—ฎ๐˜€๐—ฒ ๐—น๐—ฎ๐˜‚๐—ป๐—ฐ๐—ต๐—ฒ๐—ฑ - Reflective releases a ranked map of key unknowns in SAI to guide transparent research and funding priorities.

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5๏ธโƒฃ @guardian ๐˜€๐—ฒ๐—ฟ๐—ถ๐—ฒ๐˜€ ๐˜€๐—ฝ๐—ผ๐˜๐—น๐—ถ๐—ด๐—ต๐˜๐˜€ ๐—ฆ๐—ฅ๐—  ๐—ฑ๐—ฒ๐—ฏ๐—ฎ๐˜๐—ฒ - Contributors argue against research bans, stress inclusive governance, and support cautious experimentation.

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6๏ธโƒฃ ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฑ ๐—ฆ๐—ฅ๐—  ๐—ฌ๐—ฒ๐—ฎ๐—ฟ ๐—ถ๐—ป ๐—ฅ๐—ฒ๐˜ƒ๐—ถ๐—ฒ๐˜„ ๐—ฝ๐˜‚๐—ฏ๐—น๐—ถ๐˜€๐—ต๐—ฒ๐—ฑ - Andrew Lockley (@geoengineering1) and team release a comprehensive overview of SRM science, policy, media, and regulation.

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7๏ธโƒฃ ๐—–๐—ฎ๐—น๐—น ๐—ณ๐—ผ๐—ฟ ๐—ฒ๐˜ƒ๐—ถ๐—ฑ๐—ฒ๐—ป๐—ฐ๐—ฒ - @Nuffbioethics invites input on how SRM governance should reflect future generations and non-human nature.

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8๏ธโƒฃ ๐—”๐—ฟ๐—ฐ๐˜๐—ถ๐—ฐ ๐˜€๐—ฒ๐—ฎ-๐—ถ๐—ฐ๐—ฒ ๐˜๐—ต๐—ถ๐—ฐ๐—ธ๐—ฒ๐—ป๐—ถ๐—ป๐—ด ๐˜๐—ฟ๐—ถ๐—ฎ๐—น๐˜€ ๐—ฏ๐—ฒ๐—ด๐—ถ๐—ป - Advanced Research + Invention Agency (@ARIA_research)-funded RASI project (by Centre for Climate Repair & Real Ice) starts outdoor tests in Nunavut with detailed governance and community oversight.

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9๏ธโƒฃ๐—ก๐—ฒ๐˜„ ๐—ฆ๐—”๐—œ ๐—ฟ๐—ฒ๐˜€๐—ฒ๐—ฎ๐—ฟ๐—ฐ๐—ต ๐—ณ๐˜‚๐—ป๐—ฑ๐—ถ๐—ป๐—ด ๐—ฐ๐—ฎ๐—น๐—น - Reflective launches a $1.5M RFP on SAI & Earth-system tipping points

๐Ÿ”Ÿ๐—ฆ๐—ฅ๐—  ๐—™๐—ฒ๐—น๐—น๐—ผ๐˜„ ๐—ฟ๐—ผ๐—น๐—ฒ ๐—ฎ๐—ป๐—ป๐—ผ๐˜‚๐—ป๐—ฐ๐—ฒ๐—ฑ - @ecfrontiers opens applications to lead Africa-focused, justice-centred SRM engagement & governance Image
๐Ÿ“ฐWe covered all this and more in our January 2026 #SRM roundup. Read here:
โ€ฆlargeoengineeringupdates.substack.com/p/monthly-solaโ€ฆ

๐ŸšจAmid chemtrail myths and climate confusion, we deliver credible SRM news you can trust. Subscribe to stay informed:
โ€ฆlargeoengineeringupdates.substack.com

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More from @geoengineering1

Feb 5
๐ŸšจClimate pathways to 1.5ยฐC 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.

Details๐Ÿงต1/11 Image
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. Image
3/ The analysis focuses on a moderate but realistic deployment level of 6 GtCOโ‚‚ per year:
โ€ข 3 GtCOโ‚‚/yr from forestation
โ€ข 3 GtCOโ‚‚/yr from BECCS
Even at this level, land pressures are already significant.
Read 12 tweets
Jan 30
๐ŸšจThe 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

Chapters๐Ÿงต1/15 Image
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.

link.springer.com/chapter/10.100โ€ฆImage
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.

link.springer.com/chapter/10.100โ€ฆImage
Read 16 tweets
Jan 21
๐ŸšจIs 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.

DETAILS๐Ÿงต1/14 Image
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. Image
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. Image
Read 15 tweets
Jan 15
๐Ÿšจ2025 Year in Review: Solar Geoengineering Edition๐Ÿšจ

As we enter 2026, weโ€™re excited to share our yearly summary for #SRM: "Solar Geoengineering in 2025: Rays of Hope, Clouds of Doubt."

Hereโ€™s what we cover in this comprehensive review:๐Ÿงต1/11 Image
2/ ๐–๐ก๐š๐ญโ€™๐ฌ ๐ข๐ง๐œ๐ฅ๐ฎ๐๐ž๐ ๐ข๐ง ๐จ๐ฎ๐ซ ๐Ÿ๐ŸŽ๐Ÿ5 ๐ซ๐ž๐ฏ๐ข๐ž๐ฐ?
1๏ธโƒฃ Rising Temp & Escalating Climate Impacts
2๏ธโƒฃSRM Funding Announcements
3๏ธโƒฃTop SRM Stories
4๏ธโƒฃRestrictions & Bans on SRM
5๏ธโƒฃEssential SRM Reads
6๏ธโƒฃSRM in Media
7๏ธโƒฃResearch Highlights
8๏ธโƒฃOur Work Across Geoengineering Image
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 ยฐC. Top climate disasters caused $120B+ in losses, intensifying debates over mitigation, CDR & SRM. Image
Read 12 tweets
Jan 8
๐ŸšจOceans struggle to absorb Earth's carbon dioxide as microplastics invade their waters, a new study finds.

#CarbonSink #CDR #CarbonSequestration

DETAILS๐Ÿงต1/12 Image
2/ The ocean is Earthโ€™s largest carbon sink, absorbing vast amounts of COโ‚‚ from the atmosphere.

But tiny plastic particles under 5 mm (microplastics) are now everywhere, from deep sea to Arctic ice, disrupting this natural system. Image
3/ When microplastics enter the ocean, they interact with phytoplankton, the microscopic plants that absorb atm COโ‚‚ through photosynthesis.

Even tiny plastic particles can shade, stress, or damage these organisms, reducing their growth and carbon-fixing ability. Image
Read 13 tweets
Jan 7
๐ŸšจTwo recent engineering studies examine whether H2-powered aircraft can reliably deliver large payloads to the lower stratosphere for #SAI.

The papers compare a conventional tube-wing aircraft & a canard-wing alternative, analyzing design feasibility & performance limits๐Ÿงต1/14 Image
2/ Delivering aerosols to these altitudes with large payloads is difficult using existing aircraft.

Both studies explore H2 propulsion b/c it offers high gravimetric energy density & zero COโ‚‚e, potentially enabling long-duration missions without adding direct C emissions
3/ To enable comparison, both designs are evaluated against the same core mission:

โ€ข Climb and cruise at 65,000 ft
โ€ข Sustain flight for ~3.5 hours
โ€ข Deliver a ~50,000 lb aerosol payload
โ€ข Operate near aerodynamic and propulsion limits typical of the lower stratosphere
Read 15 tweets

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