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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 ⬇️
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"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)."
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"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."
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"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."
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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

May 6
πŸš¨πŸ—“CDR REMINDERS!πŸ—“πŸš¨

Here's a list of what's coming up this week (06 May - 12 May 2025) in the field of #CarbonDioxideRemoval:

πŸ”—πŸ—“οΈLink to the CDR Events Calendar:


#CDREvents #CDRJobs #Deadlines

🧡1/13 teamup.com/kshqbfhrqkw36s…Image
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3/13bioenergia.fi/bio-co2-use-an…
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May 4
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 (28 April - 04 May 2025):

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🧡0/21
Mirova announced a $40M investment in carbon projects across Argentina, Costa Rica, and Madagascar to restore 40,000 hectares, sequester 9.5M tonnes of COβ‚‚, and support local communities.

1/21
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Brazilian carbon removal startup Mombak has secured $30 million in Series A funding, led by Union Square Ventures (USV), to accelerate reforestation and carbon removal projects across the Amazon.

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May 2
🚨How much land will CDR take?

New research shows that large-scale #CDRβ€”essential for 1.5Β°C or 1Β°C climate goalsβ€”could demand vast land areas if we rely on energy crops, potentially up to 10% of today’s cropland. But tech-based sol could greatly reduce that burden.

DETAILS🧡1/8 Image
2/ Most CDR plans today focus on bioenergy with carbon capture (#BECCS), reforestation, and afforestation. These options are land-intensive. This study compares them with other portfolios that prioritize low land use, low cost, high tech readiness, and security.
3/ The researchers modeled two total CDR targets:
β€’ 500 GtCOβ‚‚ for a 1.5Β°C pathway
β€’ 1750 GtCOβ‚‚ for a 1.0Β°C pathway

They included not just the land for CDR methods, but also for energy sources like solar and wind to run the full CDR-energy-industry system. Image
Read 9 tweets
Apr 29
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Here's a list of what's coming up this week (29 April - 05 May 2025) in the field of #CarbonDioxideRemoval:

πŸ”—πŸ—“οΈLink to the CDR Events Calendar:


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🧡1/13 teamup.com/kshqbfhrqkw36s…Image
EVENTβ€”Marine Carbon Removal Fireside by Seoi.Cure CDR x Women in Carbon

πŸ—“29 April 2025 | London, England
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2/13lu.ma/1vyqin0b
EVENTβ€”European Carbon Removal Policy in 2025: The Trailblazers Moving CDR Forward by Carbonfuture

πŸ—“29 April 2025 | Online
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3/13carbonfuture.com/events/europea…
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Apr 27
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 (21 April - 27 April 2025):

πŸ”—:

🧡0/25
@xprize announced the winners of its $100M CDR competition. The grand prize of $50M went to @mati_carbon for ERW. Other awards included $15M to @NetZero, $8M to @VaultedDeep, $5M to @undocarbon & $1M each to Planetary & Project Harar.

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Microsoft has signed a large-scale carbon removal deal, purchasing 1.4 million tonnes of credits from @living_carbon’s reforestation projects on degraded U.S. mine lands.

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Read 28 tweets
Apr 25
🚨A recent field study conducted over the Great Barrier Reef has provided key insights regarding sea spray aerosols (SSA).

For the first time, it shows that SSA can reach the cloud base height, advancing Marine Cloud Brightening (#MCB) research.

DETAILS🧡1/8 Image
2/ MCB is a proposed climate intervention that aims to reflect more sunlight by enhancing marine clouds.

The concept relies on artificially generated sea spray aerosols (SSA) at the ocean surface and their transport in sufficient quantities to low-level maritime clouds.
3/ A portion of the SSA that reaches cloud height can act as additional cloud condensation nuclei and modify cloud microphysical properties, potentially reducing the amount of solar radiation reaching the sea surface.
Read 9 tweets

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