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May 4, 2023 β€’ 9 tweets β€’ 6 min read β€’ Read on X
πŸš¨ππ„π– π’π“π”πƒπ˜πŸš¨

"Stratospheric Aerosol Geoengineering (SAG) is a proposed #SolarGeoengineering approach to offset #ClimateChange impacts, but may have -ve effects on hydrology."

In this regard new study is published in "πΆπ‘™π‘–π‘šπ‘Žπ‘‘π‘’ π·π‘¦π‘›π‘Žπ‘šπ‘–π‘π‘ ."

Details ⬇️
🧡1/9 Image
"Using a climate model, researchers quantify the sensitivity of the tropical monsoon precipitation to the meridional distribution of volcanic #SulfateAerosols prescribed in the #stratosphere in terms of the changes in aerosol optical depth (AOD)."
2/9 Image
"In the experiments, large changes in summer monsoon 🌧️ in the tropical monsoon areas are simulated, mainly over the Indian region, in alliance with meridional shifts in the location of the intertropical convergence zone caused by changes in interhemispheric AOD differences."
3/9 Image
Based on the simulations of this study, authors "estimate a sensitivity of βˆ’1.8°±0.0Β° meridional shift in global mean ITCZ & a 6.9Β±0.4% reduction in NH monsoon index (NHMI; summer monsoon precipitation over NH monsoon regions) /0.1 interhemispheric AOD difference (NH-SH)."
4/9 Image
This study also "quantify the sensitivity in terms of interhemispheric (IH) differences in effective #RadiativeForcing & IH temperature differences: 3.5±0.3% change in NHMI per unit (Wm⁻²) IH radiative forcing difference & 5.9±0.4% change/unit (°C) IH temp. difference."
5/9 ImageImage
"Similar sensitivity estimates are also made by the researchers of this study for the Indian monsoon precipitation."
6/9 ImageImage
"The establishment of the relationship btw interhemispheric AOD (or radiative forcing) differences and ITCZ shift as discussed in this paper will further facilitate and simplify understanding of the effects of #StratosphericAerosolGeoengineering on tropical monsoon rainfall."
7/9 Image
Read the study entitled, "Quantification of tropical monsoon precipitation changes in terms of interhemispheric differences in stratospheric sulfate aerosol optical depth" here ⬇️
researchgate.net/publication/37…

#StratosphericAerosolGeoengineering
#SolarGeoengineering

8/9

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More from @geoengineering1

Jun 1
πŸ“πŸ’‘π–πžπžπ€π₯𝐲 𝐂𝐃𝐑 𝐇𝐒𝐠𝐑π₯π’π π‘π­π¬πŸ’‘πŸ“

πŸ“° Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (26 May - 01 June 2025):

πŸ”—:

🧡0/21
Gresham House raised Β£500M to expand UK forestry and carbon removal, targeting 4.7M tonnes of COβ‚‚ via nature-based credits.

1/21
esgnews.com/gresham-house-…
Biochar firm TOWING raised Β₯1.94B (~$12M) in Series B to scale its high-performance carbon removal tech.

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prtimes.jp/main/html/rd/p…
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May 29
🚨A NEW study explores a theoretical #geoengineering approach to combat global warming β€” by altering Earth’s orbit.

Simulations suggest that shifting Earth ~5.8% farther from the Sun could cool the planet by roughly 7K, effectively offsetting projected warming.

DETAILS🧡1/10
2/ Climate models suggest global temperatures could rise by 7K by 2100, driven by greenhouse gas emissions.

This study asks: what if, instead of changing the atmosphere, we changed our position in space?
Specifically: increase Earth’s orbital radius.
3/ Basically, the paper builds on the science of Milankovitch cycles which is slow, natural variations in Earth’s orbit and tilt that have triggered past ice ages.

These cycles show that even slight orbital changes can dramatically affect climate. Image
Read 12 tweets
May 28
🚨What’s ahead in #SolarGeoengineering?🚨

From research proposal deadlines to online events, in-person conferences, and job alerts β€” our SRM Events Calendar is packed with all key updates.

πŸ”—:

Here’s what’s coming up in the SRM field:🧡1/13 teamup.com/ks64mmvtit583e…Image
CALL FOR RESEARCH PRESENTATION PROPOSALβ€”RFF and the Harvard Solar Geoengineering Research Program invite individuals to present research at their upcoming workshop

πŸ—“Deadline: 30 May 2025
πŸ”—

2/13rff.org/events/confere…
EVENTβ€”Climate Intervention Virtual Symposia #18

πŸ—“30 May 2025 | Online
πŸ”—

3/13sites.google.com/view/solargeo-…
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May 27
πŸš¨πŸ—“Carbon Removal Events Calendar by Andrew Lockley!πŸ—“πŸš¨

Here's a list of what's coming up this week (27 May - 03 June 2025) in the field of #CarbonDioxideRemoval:

πŸ”—:

🧡1/15 teamup.com/kshqbfhrqkw36s…Image
EVENTβ€”This is CDR: Avnos' Water-Positive, Hybrid Direct Air Capture with Will Kain by @openaircollect

πŸ—“27 May 2025 | Online
πŸ”—lu.ma/xw0eh18o
EVENTβ€”A European CDR Purchasing Programme by CDR Policy Scoop

πŸ—“27 May 2025 | Online
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Read 16 tweets
May 25
πŸ“πŸ’‘π–πžπžπ€π₯𝐲 𝐂𝐃𝐑 𝐇𝐒𝐠𝐑π₯π’π π‘π­π¬πŸ’‘πŸ“

πŸ“° Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (19 May - 25 May 2025):

πŸ”—:

🧡0/24
@AltCarbonIndia secured $12 million in seed funding to scale its enhanced rock weathering operations in South Asia.

1/24
alt-carbon.com/press-releases…
JPMorgan signed 13-year deal with CO280 to remove 450,000 tons of biogenic COβ‚‚ from a U.S. pulp mill at under $200/tonβ€”one of the largest and lowest-cost CDR deals to date.

2/24
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Read 27 tweets
May 23
🚨Can a single particle both reflect sunlight and capture COβ‚‚β€”offering a two-in-one tool for climate intervention?🚨

In a new study [preprint], researchers tested the idea with zeolite aerosols. Here's what they found:🧡1/6

#SolarGeoengineering #CDR #ClimateTech Image
The concept: Inject aerosols into the stratosphere that not only reflect sunlight (like standard #SAI) but also adsorb COβ‚‚ from the air.

Zeolites, known for their COβ‚‚-trapping ability, seemed like a candidate for this dual function. Image
But stratospheric conditions are harsh:

β€’~0.05 atm pressure

β€’Very low temperatures

Under these conditions, zeolites lose over 99.97% of their COβ‚‚ adsorption capacity compared to ground-based DAC, finds the study. Image
Read 7 tweets

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