"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 "πΆπππππ‘π π·π¦ππππππ ."
Details β¬οΈ
π§΅1/9
"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
"In the experiments, large changes in summer monsoon π§οΈ 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
Based on the simulations of this study, authors "estimate a sensitivity of β1.8°±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
This study also "quantify the sensitivity in terms of interhemispheric (IH) differences in effective #RadiativeForcing & IH temperature differences: 3.5Β±0.3% change in NHMI per unit (Wmβ»Β²) IH radiative forcing difference & 5.9Β±0.4% change/unit (Β°C) IH temp. difference." 5/9
"Similar sensitivity estimates are also made by the researchers of this study for the Indian monsoon precipitation." 6/9
"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
Read the study entitled, "Quantification of tropical monsoon precipitation changes in terms of interhemispheric differences in stratospheric sulfate aerosol optical depth" here β¬οΈ researchgate.net/publication/37β¦
π¨Enhanced Rock Weathering (#ERW) could remove up to 700 Mt COβ by 2070 in the UK if quarry production scales 5β10Γ.
Larger extraction sites boost efficiency but raise major social, logistical & policy challenges.
A new @CommsEarth study models the trade-offs.π§΅1/11
2/ ERW involves spreading crushed silicate rocks on croplands to capture COβ.
While previous studies examined its chemistry & agronomic benefits, this work focuses on the supply chain: can the UK sustainably scale rock extraction to meet net-zero needs?
3/ The authors model deployment from 2025β2070 under 3 supply scenarios:
Low (32 Mt rock/yr), medium (97 Mt rock/yr) & high rock (166 Mt rock/yr) demand with variations in whether expansion relies on active, inactive, or new quarries.
π¨A new CSIRO-led study finds Australia can achieve net-zero emissions cost-effectively by 2050 if it acts early.
Rapid decarbonisation of electricity, scaled #CarbonRemoval, and strategic land offsets are central to success.
Detailsπ§΅1/9
2/ The research adapts the IEAβs global net-zero scenarios to Australiaβs economy using an integrated economicβenergy model.
It compares a Rapid Decarbonisation pathway, consistent with limiting warming to 1.5 Β°C, with a Stated Policies path leading to ~2.6 Β°C by 2100.
3/ Electricity emerges as cornerstone. In rapid pathway, coal is 85% retired by 2030 & fully phased out by 2035.
Renewables supply ~90% of generation by 2030, cutting emissions intensity to ~15% of 2020 levels & enabling deeper decarbonisation across various sectors.
π° Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (04 August - 10 August 2025):
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Everoβs Ince biomass plant will be converted into the UKβs first BECCS site by 2029, capturing 217,000 t COβ/year, processing 170,000 t waste wood, and powering 100,000+ homes.
π¨New research out on US public perceptions of #SolarGeoengineering:
More Americans oppose SRM research than support it, and 1 in 5 believe government-led atmospheric modification is already underway.
DETAILSπ§΅1/11
2/ Using 64 interviews, 10 focus groups, and a survey of 3,076 Americans, the study found strong initial rejection of solar radiation modification (#SRM) as a research priority.
Skepticism, fear of unintended consequences, and concern over βplaying Godβ were dominant themes.
3/ Only 32.6% supported further SRM research. A notable 43.7% opposed it. For comparison, support was ~80% in similar studies from a decade ago. Enthusiastic support is now virtually nonexistent in qualitative responses.
π° Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (28 July - 03 August 2025):
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Germanyβs 2026 draft budget allocated β¬111 million for negative emissions in 2026 and a further β¬320 million in subsequent years. A new federal department has also been set up to focus on carbon removal.