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@unknown
Apr 16 • 5 tweets • 4 min read Twitter logo Read on Twitter
#Sulfate #aerosols are particles in the atm that have a net #cooling effect on the #climate. One of the most uncertain aspects of climate modeling is the surplus of SA during the preindustrial era. 

So, a recent study explored preindustrial SA in a Greenland ice core.
🧵
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"Sulfur isotopes in a Greenland ice core show that passive #volcanic degassing contributes 66% of preindustrial Arctic #sulfate."
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"The volcanic inventory used by most climate models underestimates passive #degassing, possibly due to missing #HydrogenSulfide emissions."
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"Elevated preindustrial passive volcanic degassing reduces the estimated #cooling effect of anthropogenic #sulfate in the Arctic by up to a factor of two (+0.11 to +0.29 W m−2)."
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Access article ⬇️
agupubs.onlinelibrary.wiley.com/doi/10.1029/20…
#RadiativeForcing
#SulfateAerosols
5/5

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Twitter author Profile picture
Apr 18
Michael Finus's project "The Governance Architecture of Climate Agreements in the Light of #SolarRadiation" analyzed "how #GeoEngineering in the form of #SRM, associated with the potential of high collateral damages, affects the governance architecture of climate agreements."
1/ ImageImage
This project "clarify under which conditions signatories to a climate agreement can avoid that non-signatories deploy risky #geoengineering."
2/ Image
This study also "correct & qualify the results of Millard-Ball (2012): not only must collateral damages be above but also below a threshold so as the threat to deploy #geoengineering can stabilize a climate agreement on reducing #GHG."

Read Preprint ⬇️
papers.ssrn.com/sol3/papers.cf…
3/ Image
Read 4 tweets
Twitter author Profile picture
Apr 16
Top #CarbonDioxideRemoval stories/news from the past week covered in a 🧵below ⬇️
Featuring:
🔸@undo
🔸@noya
🔸Frontier
🔸@Climeworks
🔸Apple

Read below ⬇️ Image
1️⃣ @undocarbon inked a contract with Microsoft to #remove 5000 tonnes of atmospheric CO2 by spreading crushed #basalt rock on agricultural land, accelerating #RockWeathering.
#CarbonRemoval
2️⃣ The carbon removal startup @noya_carbon has announced the successful closing of its Series A financing round, with $11 million raised in investment for its future #DAC technology projects.
#CarbonRemoval
Read 6 tweets
Twitter author Profile picture
Apr 16
🚨THESIS🚨
An analysis of published data exploring the effects of high pH on #phytoplankton growth rate & experimental assessment of pH dependence of viability & growth rate was used in a "lately published thesis" to assess potential impacts of #OceanAlkalinityEnhancement.
🧵
1/4 ImageImage
📉 The results from this study suggest that there will be no significant impact on the viability or growth rates of Thalassiosira pseudonana or Pavlova lutheri with short-term (10-minute) exposure to elevated #pH. 
#OAE
2/4 ImageImageImage
However, when long-term (days) exposure occurs there is a significant decrease in growth rates with high pH. Short-term exposure is predicted to more closely mirror the natural systems in which #OAE will be implemented because of system flushing & replenishment of nutrients. 
3/4 Image
Read 4 tweets
Twitter author Profile picture
Apr 16
🚨REVIEW PAPER🚨
#Hydrogen, a green energy carrier, is one of the most promising energy sources. However, it is currently mainly produced from depleting #FossilFuels with high #carbon emissions, which has serious -ve effects on the economy and environment. 
#HyBECCS
#ATT
🧵
1/6 ImageImage
To address this issue, sustainable hydrogen production from bio-energy with #carbon capture and #storage (#HyBECCS) is an ideal technology to reduce global carbon emissions while meeting energy demand. 
2/6 ImageImage
So, a recent review presents an overview of "the latest progress in alkaline thermal treatment (#ATT) of #biomass for #hydrogen production with #carbon storage, mainly focusing on the technical characteristics & related challenges from an industrial application perspective."
3/6 Image
Read 6 tweets

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