🚨🆕STUDY🚨
"The study explored the wide range in #CDR deployment volumes across 1.5°C compatible & high overshoot pathways by evaluating the links btw CDR & conceptually linked scenario aspects, via focus on CDR in 2050 & scenario properties related to reaching #NetZero CO2."
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"#CDR volumes
were further evaluated in terms of their relative and absolute contribution to total mitigation up until reaching
net-zero CO2, showing considerable variation across scenarios with a median relative contribution of around 20%." 2/7
"The volumes of #CDR in 2050 and 2100 and the cumulative amount throughout the 21st century were most strongly correlated to the degree to which CO2 emissions are reduced as a means of reaching net-zero CO2." 3/7
"The volume of #CDR in 2050
is also substantially correlated to the timing of #NetZero CO2." 4/7
"The robustness of the analyzed relationships was evaluated by comparing different scenario filtering and data-cleaning approaches." 5/7
"Beyond filtering and cleaning, additional factors that influence #CDR deployment in scenarios, such as discount rates, carbon price trajectories, and scenario design choices," were also discussed in this study.
6/7
💡📖Read the paper entitled, "Understanding the carbon dioxide removal range in 1.5 °C compatible and high overshoot pathways" here ⬇️ iopscience.iop.org/article/10.108…
🚨A major 6-country survey (N=5,310) finds Europeans support -ve emissions to meet climate goals, but strongly prefer nature-based solutions like afforestation over engineered options like Direct Air Capture. Trust hinges on benefits for nature & future generations.
🧵1/10 #CDR
2/ When allocating how to tackle emissions, respondents clearly prioritized immediate mitigation:
🚨A new study warns that efforts to cool the planet through stratospheric aerosol injection (#SAI) could face far greater challenges than models predict, from unpredictable monsoon shifts to material shortages & engineering limits, every step adds new risks.
🧵1/8 #SRM
2/ The authors explore both micro-level (engineering) and macro-level (governance & supply) factors that could restrict feasible deployment.
Key finding: these constraints could drastically raise costs, risks, and uncertainty, especially for “solid” (non-sulfate) aerosols.
3/ Traditional SAI uses sulfate aerosols (like volcanoes).
But alternatives, CaCO₃, TiO₂, Al₂O₃, ZrO₂, even diamond, promise less ozone damage.
Yet producing, aerosolizing, and dispersing these solids in submicron form is technically daunting.
🚨French Academy of Sciences has released a new report on #SolarGeoengineering, stressing that the absolute priority must remain reducing GHG emissions via structural changes & accelerating adaptation to climate impacts.
On #SRM, the report offers several recommendations:🧵1/6
2/ SRM Recommendation 1️⃣
Promote an international agreement aimed at prohibit any initiative, public or private, to deploy SRM, regardless of the framework or scale.
To do this, the entire scientific community will have to be involved.
3/ SRM Recommendation 2️⃣
Support & deepen research on climate, atmospheric physicochemical processes and biodiversity in order to be able to rigorously assess the potential & risks of SRM.
🚨An analysis of forest-based projects funded through the sale of #CarbonCredits shows that 10% of them may have a net warming effect on the climate because of the way they alter the Earth’s #albedo, or how much sunlight is reflected back into space.
DETAILS🧵1/12
2/ Albedo is how much sunlight Earth’s surface reflects vs. absorbs
Forests are darker than grass or snow, meaning they absorb more heat
So when grasslands or snowy areas are turned into forests, Earth’s surface can absorb more heat, partly cancelling out cooling effect of #CDR
3/ So, this study analyzed 172 Afforestation, Reforestation & Revegetation projects in the Voluntary Carbon Market - projects that collectively aim to deliver nearly 800 million tons of CDR over the next century.
But none of these projects’ standards account for albedo change.