"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¨π² New research reveals that even intact boreal forests, some of the planetβs strongest natural carbon sinks, lose their ability to absorb COβ as they age.
Hereβs what the scientists found & why it matters for our climate modelsπ§΅1/9 #CarbonSink #CarbonRemoval
2/ Boreal forests cover vast regions across Canada, Russia, and Scandinavia and store enormous amounts of carbon in trees and soil.
Theyβre often seen as stable, long-term carbon sinks, but this study challenges that assumption with new global-scale data.
3/ Using seven global Net Ecosystem Productivity (NEP) datasets and a high-resolution forest age map, researchers tracked how C uptake changes as forests grow older.
They used a space-for-time substitution method, comparing forests of different ages to infer long-term trends.
π¨A major 6-country survey (N=5,310) finds Europeans support -ve emissions to meet climate goals, but strongly prefer nature-based solutions like afforestation over engineered options like Direct Air Capture. Trust hinges on benefits for nature & future generations.
π§΅1/10 #CDR
2/ When allocating how to tackle emissions, respondents clearly prioritized immediate mitigation:
π¨A new study warns that efforts to cool the planet through stratospheric aerosol injection (#SAI) could face far greater challenges than models predict, from unpredictable monsoon shifts to material shortages & engineering limits, every step adds new risks.
π§΅1/8 #SRM
2/ The authors explore both micro-level (engineering) and macro-level (governance & supply) factors that could restrict feasible deployment.
Key finding: these constraints could drastically raise costs, risks, and uncertainty, especially for βsolidβ (non-sulfate) aerosols.
3/ Traditional SAI uses sulfate aerosols (like volcanoes).
But alternatives, CaCOβ, TiOβ, AlβOβ, ZrOβ, even diamond, promise less ozone damage.
Yet producing, aerosolizing, and dispersing these solids in submicron form is technically daunting.
π¨Scientists built a device that captures carbon from the seawater and turns it into biodegradable plastic, using bacteria as a living bioreactor.
#CDR #mCDR #CarbonDioxideRemoval #Bioplastics
DETAILSπ§΅1/8
2/ The system comprises 3 components:
1οΈβ£ C extraction
Traditional seawater electrolysis systems often fail within hours due to mineral buildup
To solve this, researchers designed a solid-state electrolysis unit that isolates sensitive ions using membranes & a solid electrolyte
3/ The modified design acidifies H2O, converting dissolved C (mainly bicarbonate & carbonate ions) into COβ gas for collection.
The prototype operated continuously for 22 days, processing 177 liters of seawater & extracting 6.54L of COβ, with an energy use of 3 kWh/kg of COβ.
π¨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:π§΅1/6
2/ SRM Recommendation 1οΈβ£
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 2οΈβ£
Support & deepen research on climate, atmospheric physicochemical processes and biodiversity in order to be able to rigorously assess the potential & risks of SRM.