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May 7 8 tweets 6 min read Twitter logo Read on Twitter
🚨NEW STUDY🚨

🌲"#Sequestering C in forest ecosystems is important for mitigating #ClimateChange."

✍️"Policy concern: whether forests should be left unharvested to reduce CO2 #emissions & store C, or harvested to take advantage of potential #CarbonStorage & #removal."

🧵1/8 ImageImage
So, new study addressed this issue "by examining C rotation ages that consider commercial timber and C values. A discrete-time optimal rotation age model is developed that uses data on C #fluxes stored in living & dead biomass as opposed to C as a function of timber growth."
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"Carbon is allocated to several ecosystem and post-harvest product pools that decay over time at different rates. In addition, the timing of #CarbonFluxes is taken into account by weighting future carbon fluxes as less important than current ones."
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Using simple formulae for determining optimal 𝐂 𝐫𝐨𝐭𝐚𝐭𝐢𝐨𝐧 𝐚𝐠𝐞𝐬, this study draws the following conclusions:
1️⃣ "Reducing the price of timber while increasing the price of #carbon will increase rotation age, perhaps to infinity (stand remains unharvested)."
4/8 Image
2️⃣ "An increase in the rate used to discount physical carbon generally reduces the rotation age, but not in all cases."

3️⃣ "As a corollary, an increase in the price of #carbon increases or reduces rotation age depending on the weight chosen to discount future #CarbonFluxes."
5/8 Image
4️⃣ "Site characteristics and the mix of species on the site affect conclusions 2️⃣ and 3️⃣."

5️⃣ "A large variety of #CarbonOffset credits from forestry activities could be justified, which makes it difficult to accept any."
6/8 Image
📜🌲 Read the open-access paper entitled: "Determining optimal forest rotation ages and carbon offset credits: Accounting for post-harvest carbon storehouses," here ⬇️
onlinelibrary.wiley.com/doi/full/10.11…

#CarbonSequestration
#CarbonRemoval
#ForestEcosystem

7/8

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More from @geoengineering1

May 8
🚨NEW STUDY🚨
"Six models are used in a recent study to analyze the climatic, environmental & socio-economic consequences of #overshooting a C budget consistent with the 1.5°C temp target along the cause-effect chain from emissions & #CarbonRemovals to climate risks & impact."
🧵 Image
"Global climatic indicators such as CO2-concentration and mean temperature closely follow the #CarbonBudget #overshoot with mid-century peaks of 50 ppmv and 0.35°C, respectively."
2/10
Findings of this study highlight that "investigating #overshoot scenarios requires temporally and spatially differentiated analysis of climate, environmental and socioeconomic systems."
3/10
Read 10 tweets
May 7
✍️ 𝐖𝐞𝐞𝐤𝐥𝐲 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬 ✍️

Top #CarbonDioxideRemoval News /Scientific papers from the past week covered in a 🧵below: ⬇️
🌱🎛️🪨🌊

1/15 Image
1️⃣ 🌊"Dalhousie receives historic $154‑million investment to study the ocean’s pivotal role in climate change. The 𝐥𝐚𝐫𝐠𝐞𝐬𝐭 𝐫𝐞𝐬𝐞𝐚𝐫𝐜𝐡 𝐠𝐫𝐚𝐧𝐭 in Dalhousie history"!
@planetary_tech

#OceanAlkalinityEnhancement

➡️

2/15
2️⃣ 🚜🌾"The Carbon Business Council (@CO2Council) released a policy brief on #CarbonRemoval and the #2023FarmBill."

➡️

3/15
Read 15 tweets
May 6
🚨NEW STUDY🚨

🌊Recent study "presents the mass balances linked with #CarbonDioxideRemoval using seawater as both the source of reactants & as the reaction medium via electrolysis following the “Equatic” (formerly known as “SeaChange”) process."

🌊Details in a 🧵 below ⬇️
1/12 Image
"The #Equatic process, broadly detailed in (pubs.acs.org/doi/full/10.10…), involves the application of an electric overpotential that splits H2O to form H+ & OH– ions, producing #acidity & #alkalinity, i.e., in addition to gaseous coproducts at the anode & cathode, respectively."
2/12 Image
"The #alkalinity that results, i.e., via the steady electrolytic pH pump results in the rapid precipitation of CaCO3, hydrated magnesium #carbonates (e.g., nesquehonite & hydromagnesite, etc.) or Mg(OH)2 depending on the carbonate ion-activity in solution."
3/12 Image
Read 12 tweets
May 5
🚨NEW STUDY🚨

"#Afforestation & #reforestation are worthwhile solutions for C sequestration, but lack of hierarchical spatial-temporal maps for national scale #CarbonSequestrationRate hinders scientific implementation."

In this regard, a new study is published, details ⬇️
1/8🧵 Image
🌲Researchers assessed "the spatial-temporal #CarbonSequestrationRate (CSR) per area for #Afforestation & #Reforestation at the provincial, prefectural, and county levels in China using a forest carbon sequestration model under three climate scenarios."
2/8
🌳🌱Results showed that "the #CSR of vegetation (CSRVeg), soil (CSRSoil), and the ecosystem (CSREco) significantly varied across space and time. In China, the CSRVeg, CSRSoil, and CSREco were primarily regulated by the spatial variations in temperature and precipitation."
3/8
Read 8 tweets
May 4
🚨𝐍𝐄𝐖 𝐒𝐓𝐔𝐃𝐘🚨

"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 "𝐶𝑙𝑖𝑚𝑎𝑡𝑒 𝐷𝑦𝑛𝑎𝑚𝑖𝑐𝑠."

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
Read 9 tweets
May 4
🚨📝𝐍𝐄𝐖 𝐒𝐓𝐔𝐃𝐘📝🚨

"Researchers recently investigate the feasibility of industrial-scale geological #CarbonSequestration as an effective #ClimateChange mitigation technology."

📜Details are discussed in a🧵⬇️

[1/9] Image
"This investigation was done by performing numerical simulations of coupled multiphase flow and geomechanics on a representative field-scale #geological model in the Gulf of Mexico that could become a typical CO2 #storage site."
2/9
Authors use "representative model to examine 2 potential hazards associated with large-scale CO2 storage:
🔸CO2 might migrate to shallower formations
🔸CO2 injection might induce seismicity due to destabilization of pre-existing faults."
3/9 ImageImage
Read 9 tweets

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