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May 8, 2023 10 tweets 8 min read Read on X
🚨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."
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"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."
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Findings of this study highlight that "investigating #overshoot scenarios requires temporally and spatially differentiated analysis of climate, environmental and socioeconomic systems."
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Researchers find "persistent and spatially heterogeneous differences in the distribution of #carbon across various pools, ocean heat content, sea-level rise as well as #economic damages."
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"Moreover, it was find in the study that key impacts, including degradation of marine ecosystem, heat wave exposure & economic damages, are more severe in equatorial areas than in higher latitudes, although absolute #temperature changes are stronger in higher latitudes."
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"The detrimental effects of a 1.5 °C warming and the additional effects due to #overshoots are strongest in non-OECD countries (Organization for Economic Cooperation and Development)."
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"Constraining the overshoot inflates CO2 prices, thus shifting #CarbonRemoval towards early #afforestation while reducing the total cumulative deployment only slightly, while mitigation costs increase sharply in #DevelopingCountries."
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"Thus, scenarios with C budget overshoots can reverse global mean temp increase but imply more persistent & geographically heterogeneous impacts. Overall, the decision about #overshooting implies more severe trade-offs btw #mitigation & impacts in #DevelopingCountries."
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Read the study led by @NB_pik entitled: "Exploring risks and benefits of overshooting a 1.5 °C carbon budget over space and time" here ⬇️
iopscience.iop.org/article/10.108…

#CarbonDioxideRemoval
#Overshoot

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More from @geoengineering1

Nov 22
🚨Soil food webs boost carbon retention in farmlands

A new study reveals that simply returning crop residues to fields can supercharge soil food webs, enabling microbes, nematodes & fungi to lock significantly more photosynthetic C into farmland soils.

Details🧵1/8 #CarbonSink Image
2/ Researchers from the Institute of Applied Ecology, Chinese Academy of Sciences (CAS), used field trials and ¹³C isotope tracing to map how carbon fixed by crops travels into soil and through the soil food web.
3/ FINDINGS:

Returning crop residues (stover) emerged as a key driver:

It increased particulate organic carbon (POC) by ~30.96% & mineral-associated organic carbon (MAOC) by ~11.39% compared with plots where stover was removed.
Read 9 tweets
Nov 19
🚨New research shows how integrating Direct Air Capture (#DAC) with urea production - paired with CO₂ pricing can slash emissions, reach cost parity with fossil-based urea by 2050 & reshape global fertiliser markets through policies like the EU #CBAM.

DETAILS🧵1/9 #CDR Image
2/ What DAC-urea is?

It's urea fertilizer made with CO₂ pulled directly from the air instead of CO₂ from fossil fuels.

Air-captured CO₂ + green ammonia → urea.

Same fertilizer, but far lower climate impact. Image
3/Study presents a framework combining process modelling, prospective LCA & TEA to compare DAC-urea with conventional fossil-based urea today & under 2050 climate scenarios, including a cross-country assessment of Denmark’s clean electricity system & Egypt’s more C-intensive grid Image
Image
Read 10 tweets
Nov 17
🚨✨𝗛𝗮𝗹𝗳 𝗮 𝗠𝗶𝗹𝗹𝗶𝗼𝗻 𝗩𝗶𝗲𝘄𝘀!✨🚨

Our “Carbon Removal Updates Newsletter” community keeps growing, now past 𝟰,𝟬𝟬𝟬 subscribers across every continent. We’ve delivered 146+ weekly CDR updates & reached 𝟱𝟬𝟬,𝟬𝟬𝟬+ total views.

🧵1/10 Image
2/ 𝗚𝗹𝗼𝗯𝗮𝗹 𝗥𝗲𝗮𝗰𝗵

🇺🇸United States: 33% (largest share of subscribers)

🇬🇧 United Kingdom: 13% & 🇩🇪Germany: 8% lead our European readership

🇮🇳 India: 5% tops the Asia-Pacific region

🇨🇦 Canada: 5% represents a significant share of our North American audience
3/ 🇺🇸𝗨𝗦 𝗥𝗲𝗴𝗶𝗼𝗻𝗮𝗹 𝗛𝗶𝗴𝗵𝗹𝗶𝗴𝗵𝘁𝘀

Our U.S. readership is concentrated in major climate and innovation hubs:

𝗖𝗮𝗹𝗶𝗳𝗼𝗿𝗻𝗶𝗮: 23%
𝗡𝗲𝘄 𝗬𝗼𝗿𝗸: 13%
𝗧𝗲𝘅𝗮𝘀: 8%
𝗪𝗮𝘀𝗵𝗶𝗻𝗴𝘁𝗼𝗻: 6%
𝗠𝗮𝘀𝘀𝗮𝗰𝗵𝘂𝘀𝗲𝘁𝘁𝘀: 4%
Read 11 tweets
Nov 5
🚨 The Royal Society has published a new briefing today finding that techniques to reflect a small portion of sunlight back into space (#SRM) could help lower global temperatures if deployed worldwide, but cannot replace emissions cuts or fully address climate impacts.

🧵1/7 Image
2/ ➝ The report reviews solar radiation modification (#SRM) approaches, including stratospheric aerosol injection (#SAI) and marine cloud brightening (#MCB), outlining their potential to temporarily reduce warming and associated risks.
3/ ➝ It notes that SRM would only mask the effects of GHG emissions and would not address issues such as ocean acidification.
Read 8 tweets
Oct 31
🚨🌲 New research reveals that even intact boreal forests, some of the planet’s strongest natural carbon sinks, lose their ability to absorb CO₂ as they age.

Here’s what the scientists found & why it matters for our climate models🧵1/9 #CarbonSink #CarbonRemoval Image
2/ Boreal forests cover vast regions across Canada, Russia, and Scandinavia and store enormous amounts of carbon in trees and soil.

They’re 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. Image
Read 10 tweets
Oct 29
🚨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.

🧵1/10 #CDR Image
2/ When allocating how to tackle emissions, respondents clearly prioritized immediate mitigation:

• Renewables: 37.3%
• Behavior change: 24.0%
• Nuclear: 20.2%
• NETPs: 18.5%

➡️ This shows people support #CDR, but believe deep emissions cuts must come first. Image
3/ So which NETPs do they support most?

2 approaches were evaluated:
🌲Afforestation/Reforestation (AR)
🏭Direct Air Capture + Carbon Storage (DACCS)

AR scored +1.91 vs DACCS +0.64

➡️ This means people are 4.36× more likely to support forests as the favored way to remove CO₂. Image
Read 11 tweets

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