🚨NEW STUDY🚨
"Six models are used in a recent study to analyze the climatic, environmental & socio-economic consequences of #overshooting a C budget consistent with the 1.5°C temp target along the cause-effect chain from emissions & #CarbonRemovals to climate risks & impact."
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"Global climatic indicators such as CO2-concentration and mean temperature closely follow the #CarbonBudget#overshoot with mid-century peaks of 50 ppmv and 0.35°C, respectively."
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Findings of this study highlight that "investigating #overshoot scenarios requires temporally and spatially differentiated analysis of climate, environmental and socioeconomic systems."
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Researchers find "persistent and spatially heterogeneous differences in the distribution of #carbon across various pools, ocean heat content, sea-level rise as well as #economic damages."
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"Moreover, it was find in the study that key impacts, including degradation of marine ecosystem, heat wave exposure & economic damages, are more severe in equatorial areas than in higher latitudes, although absolute #temperature changes are stronger in higher latitudes."
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"The detrimental effects of a 1.5 °C warming and the additional effects due to #overshoots are strongest in non-OECD countries (Organization for Economic Cooperation and Development)."
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"Constraining the overshoot inflates CO2 prices, thus shifting #CarbonRemoval towards early #afforestation while reducing the total cumulative deployment only slightly, while mitigation costs increase sharply in #DevelopingCountries."
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"Thus, scenarios with C budget overshoots can reverse global mean temp increase but imply more persistent & geographically heterogeneous impacts. Overall, the decision about #overshooting implies more severe trade-offs btw #mitigation & impacts in #DevelopingCountries."
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Read the study led by @NB_pik entitled: "Exploring risks and benefits of overshooting a 1.5 °C carbon budget over space and time" here ⬇️ iopscience.iop.org/article/10.108…
🚨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.
🚨Can buildings remove CO₂ while cooling indoor air?
A new study shows that adding CO₂ capture units (#DAC) to building cooling systems can cut energy use by over 50% & remove atmospheric carbon, even in hot, humid places.
Details🧵1/10
2/ Buildings use a lot of energy. About 37% of global energy & 40% of CO₂ emissions.
Cooling is the biggest part, taking almost 40% of building electricity.
As the planet warms, cooling demand rises, creating a vicious cycle.
3/ Direct Air Capture extracts CO₂ directly from ambient air, unlike point-source capture.
But adsorption-based DAC struggles in humid environments: water competes with CO₂ for sorbent sites, making it very energy-hungry.
🚨A new study presents the 1st structural prototype of a planetary sunshade - a large space-based system at L1 designed to block some sunlight & cool Earth.
Using solar sails, deployable booms & CubeSat-based frames, it outlines a pathway for space-based #geoengineering.🧵1/11
2/ The planetary sunshade would function as a vast array of satellites at the Sun–Earth L1 point, collectively blocking ~1.8% of incoming photons - enough to reduce global temperatures by ~2 °C.
"Unlike #SAI or orbital dust, it promises uniform, reversible cooling."
3/ The team followed European spacecraft design standards, testing different ideas with decision matrices & computer simulations (finite element analysis) to choose materials & structures that could actually survive launch.