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Geoengineering Info Profile picture
@geoengineering1
May 14 β€’ 12 tweets β€’ 11 min read Twitter logo Read on Twitter
πŸ“πŸ’‘ π–πžπžπ€π₯𝐲 𝐇𝐒𝐠𝐑π₯π’π π‘π­π¬πŸ’‘πŸ“
Here's your roundup of top #CarbonDioxideRemoval News Articles / Scientific Papers from the past week: 🌱πŸͺ¨πŸŽ›οΈπŸŒŠ

🧡
1/12 Image
1️⃣ In this week’s @CipherClimate Voices article, "@naimmerchant, @NoahMcQueen13, & Grant Faber discuss:
πŸ”Έthe critical role #DAC will play in achieving #NetZero
πŸ”Έhow DAC solutions are improving in terms of cost & efficiency as the tech scales."

➑️

2/12
2️⃣ 🌊New paper dropped by @bach_lennart, @_david_ho_ & others on "how to deal with air-sea gas exchange uncertainties when assessing the efficacy of ocean-based #CarbonDioxdeRemoval."

πŸ“πŸ“–βž‘οΈ

3/12
3️⃣ πŸ‘©β€πŸ”¬ Recently published #Doctoral #thesis provided a novel approach, "where a thermodynamic model was constructed using psychometric theories to model the #desublimation of CO2 in a #DirectAirCapture system."

πŸŽ™οΈπŸ”Šβž‘οΈ

πŸ“πŸ“–βž‘οΈ

4/12
4️⃣ 🌊Researchers ascertain that "even if atm. CO2 can be lowered in the future as a result of net -ve CO2 emissions, the recovery of some aspects of #OceanAcidification would take decades to centuries."

πŸŽ™οΈπŸ”Šβž‘οΈ

πŸ“πŸ“–βž‘οΈ

5/12
5️⃣ 🧱 Research funded by MRS scholarship from University Malaysia Pahang reviewed "the prospect of #biochar as a #cementitious material by assessing its physical, chemical, mechanical & durability properties."

πŸŽ™οΈπŸ”Šβž‘οΈ

πŸ“πŸ“–βž‘οΈ

6/12
6️⃣ ✍️"Using a lightweight integrated assessment model called [SCORE], a new exploration examines potential scenarios for keeping #GlobalWarming to 1.5 Β°C by 2100 by removing carbon dioxide from the atmosphere."

πŸŽ™οΈπŸ”Šβž‘οΈ

πŸ“πŸ“–βž‘οΈ

7/12
7️⃣ πŸ“œNew study led by @NB_pik on overshoot scenarios & the risks & trade-offs discerned by regions published in Env. Research Letters where researchers used a bunch of models to get insights into various aspects.

πŸŽ™οΈπŸ”Šβž‘οΈ

πŸ“πŸ“–βž‘οΈ

8/12
8οΈβƒ£πŸ”¬Experiment endorsed by Natural Sci Foundation of Heilongjiang Province "examined solubility & pH of CO2 in aqueous solutions & revealed that both parameters are vital precisely for CO2 injections in oceans."

πŸŽ™οΈπŸ”Šβž‘οΈ

πŸ“πŸ“–βž‘οΈ

9/12
9οΈβƒ£πŸ¦ Researchers found that "if the amount ofΒ CΒ produced by tiny organisms in Southern Ocean (SO) declined by 30%, the SO would release CO2 thanΒ #absorbingΒ it, which could worsen theΒ #GreenhouseEffectΒ on the planet."

πŸŽ™οΈβž‘οΈ

πŸ“βž‘οΈ

10/12
πŸ”ŸπŸ“œA review study posted in @PLOS this week "assesses the highly fragmented treatment of #CarbonRemovals under compliance & #VoluntaryCarbonMarkets, including baseline, credit & cap-&-trade systems."
@HoneggerM

πŸŽ™οΈπŸ”Šβž‘οΈ

πŸ“πŸ“–βž‘οΈ

11/12
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More from @geoengineering1

Geoengineering Info Profile picture
May 14
✍️ π–πžπžπ€π₯𝐲 𝐇𝐒𝐠𝐑π₯𝐒𝐠𝐑𝐭𝐬 ✍️

Top #SolarGeoengineering News /Scientific papers from the past week covered in a 🧡below: ⬇️

1/7 Image
1️⃣ ✍️ "DMF @DegreesNGO scientists respond to NYT opinion piece on #SolarRadiationManagement."

πŸ“œFind NYT opinion piece here ⬇️
nytimes.com/2023/04/18/opi…

πŸ“œFind DMF scientists response here ⬇️


2/7
2οΈβƒ£πŸ“ A recent preprint published in @researchsquare journal reveal that, "#SolarShading could be an effective way to stabilize the #polar cryosphere. However, it has a strong impact on the hydrological cycle."

πŸŽ™οΈπŸ”Šβž‘οΈ

πŸ“πŸ“–βž‘οΈ

3/7
Read 7 tweets
Geoengineering Info Profile picture
May 14
πŸš¨βœοΈππ„π– πƒπŽπ‚π“πŽπ‘π€π‹ π“π‡π„π’πˆπ’βœοΈπŸš¨

"The discussion of energy consumption for cryogenic & combined #DirectAirCapture systems is explored in the newly published thesis."πŸŽ›οΈ

Details are discussed in aπŸ§΅β¬‡οΈ
1/10 ImageImage
In this novel approach, "a thermodynamic model was constructed using psychometric theories to model the #desublimation of CO2 in a #DAC system. The system was modeled
to include a precooling heat exchanger & a deposition chamber where the desublimation
of CO2 occurs."
2/10 Image
3️⃣ base systems studied:
πŸ”Έ NC (no precompression/turbine recovery)
πŸ”ΈPC (precompression only)
πŸ”ΈTR (precompression & turbine recovery)
at 3️⃣ different compression ratios, n=400, 800 & 2000.
Then, a combination #DAC system, PSA, was modeled."
3/10 Image
Read 10 tweets
Geoengineering Info Profile picture
May 14
πŸš¨πŸ“ππ„π– ππ€ππ„π‘πŸ“πŸš¨

A recent study used "an Earth system model to examine the response of #OceanAcidification to idealized atmospheric #CarbonDioxideRemoval scenarios."

Details in a 🧡below ⬇️
1/8 Image
"In the simulations, atmospheric CO2 is assumed to increase at a rate of 1% per year to four times its pre-industrial value and then decreases to the pre-industrial level at a rate of 0.5%, 1%, 2% per year, respectively."
2/8
Results show that "the annual mean state of surface ocean #carbonate chemistry fields including [H+] conc., pH & aragonite saturation state respond quickly to removal of atmospheric CO2. Yet, the change of seasonal cycle in CaCO3 chemistry lags behind the decline in atm CO2."
3/8
Read 8 tweets
Geoengineering Info Profile picture
May 13
🚨NEW PAPER🚨

"The potential climate impact of #SolarGeoengineering is examined in a recent study using climate model simulations by artificially reducing the incoming solar radiation at the top of the atmosphere."
#ClimateEngineering
#SolarShading

Results discussed in a🧡
1/9 ImageImage
"Climate scenario simulations reveal that a doubling of atmospheric CO2 induces a surface temperature rise which is amplified over the poles primarily during the respective winter. The warming also causes intensification & poleward shift of the global precipitation pattern."
2/9 ImageImage
"In the model, a 2.1% globally uniform #SolarReduction can largely compensate the global mean warming caused by a doubling of CO2."
3/9 ImageImage
Read 9 tweets
Geoengineering Info Profile picture
May 13
🚨NEW PAPER🚨

"Utilization of biochar as a cementitious material aids in CO2 sequestration by impeding the release of C in the atm. So, a recent study reviewed the prospect of #biochar as a #cementitious material by evaluating its physical, mechanical & durability properties."🧡 ImageImage
This research suggested that "the physical properties of #biochar promote its use as an environmental control device."
A summary of the preparation and characterization of biochar is presented in a Fig. ⬇️
2/7 Image
According to the study, #pozzolan is a siliceous & aluminous material
that chemically reacts with Ca(OH)2 at room temp to form compounds having #cementitious attributes. So, some of the silica-rich biochars, like the ones derived from #RiceHusk have pozzolanic properties."
3/7 ImageImage
Read 7 tweets
Geoengineering Info Profile picture
May 13
🚨NEW PAPER🚨

A recent study "uses a lightweight integrated assessment #model SCORE to explore possible scenarios using #CarbonDioxideRemoval for limiting #GlobalWarming to 1.5 Β°C by 2100."

🧡
1/9 Image
"Particularly, this exploration quantify the impacts of relying on #CDR when accounting for:
1️⃣ possible under- and overestimation of the cost, potential, and availability (feasibility) of future CDR and
2️⃣ the compound effect with uncertainty in climate sensitivity."
2/9
"All scenario results show that aggressive near-term mitigation is required for limiting warming to 1.5 Β°C by 2100 for all levels of climate sensitivity, but that some amount of #CDR is likely required in the future even if climate sensitivity turns out to be extremely low."
3/9
Read 9 tweets

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