Summary – Total annual removal of 103–142 megatonnes of CO₂ based on humankind’s liquified natural gas regasification capacity by 2050. the authors state, “Our analysis estimates the net energy cost at 1.7–3.3 gigajoules per tonne of CO2—far lower than conventional DAC, which requires more than 7 GJ/tonne—along with…
First published at Carbon Brief by Zeke Hausfather on June 10, 2025 https://www.carbonbrief.org/explainer-how-human-caused-aerosols-are-masking-global-warming/ Human-caused emissions of aerosols – tiny, light‑scattering particles produced mainly by burning fossil fuels – have long acted as an invisible brake on global warming. This is largely because they absorb or reflect incoming sunlight and…
Coral bleaching, Great Barrier Reef Marine Park Authority, Australian Government Once a system’s degradation begins, in general it does not stop unless the thing that caused it to begin is removed. In this case, warming has caused the crossing of the ocean acidification threshold. There are situations where…
Summary… First simulations of stratospheric sulfate injection at 30 degrees N and S, RCP8.5, +/-5 degree C warming, 51 million tons SO2 annually… Of note: scenarios overcool in summer and undercool in winter. Kravits, McMartin et al., First Simulations of Designing Stratospheric Sulfate Aerosol Geoengineering to Meet Multiple…
First published in Earth Systems Dynamics, January 25, 2022. Summary… Managing multiple climate goals simultaneously with stratospheric aerosol cooling. Small cooling is easier than large cooling with more choices of strategies available. Zhang and MacMartin et al., How large is the design space for stratospheric aerosol geoengineering, Earth…
First published at EGUsphere Preprints on January 16, 2025 Summary – Stratospheric aerosol injection at 7 latitudes, optimized to explore limitations and trade-offs for combining different latitude and seasonal injections scenarios, assuming linearity of responses… Brody et al., Using Optimization Tools to Explore Stratospheric Aerosol Injection Strategies, EGUsphere Preprint,…
UK Government is funding five, small scale geoengineering field experiments: three on marine cloud brightening, and one each on Arctic refreezing, and stratospheric aerosols totalling $78 million U.S. The article advocates for the common understanding of the nature of geoengineering in academic and public thought, “Deliberately altering the…
A 200-foot tall ice cliff at the Russell Glacier, Greenland Ice Sheet, Point 660, Kangerlussuaq, Greenland, Stokes and Decoto, May 20, 2025 – 1 C is the tipping limit of polar ice sheets… Abstract “Mass loss from ice sheets in Greenland and Antarctica has quadrupled since the 1990s…
Summary: The only way to stop collapse of the Amazon according to this studies modeling, is to reduce the temperature from today to below 1.5 C. Then and only then will tree mortality stabilize. Temporarily overshooting 1.5 C see forest loss continue for centuries because of degradation feedbacks….
Summary: The trend increased four times since the turn of the century, from an average of 0.3 W/m2 to 1.4 W/m2, see Figure 1… The max was 1.8 W/m2 in 2024, and the min was 0.0 W/m2 in 2010. The 56 authors on this paper obviously had a…
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