Arthur Vienne

📢Just out: 2 articles showing impact of biota (earthworms & Bacillus subtilis) on CO2 removal by enhanced weathering and revealing that effects on soil organic matter are critical for CO2 balance @ArthurVienne @HarunNiron @pjfrings @SilPoblador @olga_vinduskova @RijndersJet

Important paper by @GeoHartmann and colleagues indicating that ocean alkalinity enhancement by adding reactive particles can more challenging than modelers like me had thought: bg.copernicus.org/articles/20/78…

It's the cow, not the how! Prof Pete Smith: “It’s a nail in the coffin for the suggestion that carbon sequestration can offset the methane emissions. The overblown claims by the livestock industry (...)— that’s just bullshit.”  desmog.com/2024/02/01/cli…

Southern Germany where I live is now >2°C warmer than 50 to many hundreds of years ago. Europe is the fastest warming continent in the world. Look at this graph! #showyourstripes

This is the kind of picture that gives me hope: Texas is a climate leader, even though its politicians denounce it. That's because it simply makes economic sense by now and will increasingly do so. Same reason Trump could not change the demise of coal.

🌎 New paper🌎 Finally, the paper you've all been waiting for: for once, GCAM modeling scenarios NOT relying heavily on CO2 removal, and instead reducing emissions everywhere else. 👇Thread by lead author Jay Fuhrman linkedin.com/posts/jay-fuhr… 👇Paper iopscience.iop.org/article/10.108…

@cdr_fyi Is the Verra ERW standard already published? I can only find this link verra.org/methodologies/…. I would like to look into this to compare ERW methodologies, so if u have a pdf or link to this methodology, please contact me.

⁉ There are 35 methodologies and protocols for durable CDR ⁉ 🔬 At @cdr_fyi , we’ve delved into the monitoring, reporting and verification (MRV) frameworks crucial for the integrity of carbon projects within the Voluntary Carbon Market (VCM). 🔎 With 35 methodologies identified, we’re integrating them into our database to aid stakeholders and to enhance transparency and trust. In our latest blog post, we offer the following: ✅ Clear outline of terminologies such as standards, methodologies and protocols 📄 A comprehensive list of methodologies and protocols to help you navigate the landscape: ⬇ downloadable 🆕 MRV Landscape Mapping between CDR methods, standard bodies, and MRV protocols: ⬇ downloadable 🔗 Read the full article here: cdr.fyi/blog/standards… 🙌 Huge thanks to Antti Vihavainen (Puro.earth), Christopher Podgorney, Lukas May (Isometric), and Gudmundur Sigbergsson (International Carbon Registry) for reviewing and providing feedback on this post and for collaborating with us in bringing this resource to life, as we scale our efforts to bring more consistency across the durable carbon removal market. 📝 Puro.earth, Isometric, and Nori all have methodologies and protocols currently open for public consultation, see comments for more and contribute! @PuroCO2Removal @Isometric_HQ @VerraStandards @goldstandard @CStandardsInt 👏 Special thanks to @TanksonChen and Nadine Walsh for their work in putting this resource together.

Published: New working paper with insights from our 2023 greenhouse experiment for measurements of enhanced weathering BACKGROUND We present insights we gained from CO₂ efflux, soil pCO₂ and soil water leachate alkalinity data of 400 greenhouse experiments for enhanced weathering (EW), a promising new approach to carbon dioxide removal (CDR) which uses rock dusts on agricultural soils to capture CO₂. METHODS We monitored hundreds of soil-rock dust combinations in a controlled greenhouse setting using fluxmeters, sensors, and high frequency leachate analyses combined with data analytics to better understand change in soil carbon fluxes and pools. RESULTS Our findings reveal that (1) successful CO₂ capture via enhanced weathering seems often accompanied by an initial increase in CO₂ efflux (which is likely temporary) and (2) Whereas maximum CDR potential varies greatly between rock dusts depending on their composition, the CDR that can actually be realized is heavily influenced by the soil it is added to. Further scientific research is needed to fully understand which processes are exactly responsible for these observations. CONCLUSIONS Based on the high variability of observations resulting from combining 16 different soils with 12 rock dusts we suggest increasing rock-soil variations in future EW studies. We also advocate incorporation of pCO₂/CO₂ efflux measurements in more EW studies as initial CO₂ efflux spikes might need to be taken into account in the LCA of future EW projects and also because CO₂-based data could provide “early signals for future success” for EW projects.

5/ Clean energy deployment over the past 5yrs avoided 2.2bn tonnes of CO2 Without clean energy deployment, the increase in CO2 emissions in 2023 would have been 3x larger (!)

2/ Global CO2 emissions rose again in 2023, but clean energy is slowing that growth like never before

Global sea surface temperatures are once again in record territory, yesterday at 21.11°C, a temperature not seen in any year prior to 2024. We live in interesting times.

Biochar and Hydrochar Composites with Kaolinite: A Promising Solution for Sustainable Agriculture biochartoday.com/2024/01/20/bio… #Biochar #CarbonSequestration #hydrochar #hydrothermalcarbonization #kaolinite #maizegermination #PAHs #Pyrolysis #soilamendment

Food systems responsible for ‘one third’ of human-caused emissions | @ayeshatandon #CBarchive Read: bit.ly/3tMYl95

De Britten hebben besloten de EU te volgen in het aankondigen van een CO2-importheffing. De latere ingangsdatum in 2027 zou echter voor problemen in de industrie kunnen zorgen. Een 🧵 /1.

Here is a new, free dataset on the GHG emissions and profits of the world’s biggest companies. We manually collected emission data for the world's top 250 companies and used profit and revenue data from the Forbes 2000 list. The set contains 2020-2022 data. We used this for the @CarbonGap analysis on who can pay for carbon removal Use the dataset to play around yourself with different analyses, let me know what you come up with! Direct link to dataset: #gid=1986052149" target="_blank" rel="nofollow noopener">docs.google.com/spreadsheets/d…

ANALYSIS: what impact will the #COP28 announcements make on closing the emissions gap? Few of them will do so meaningfully. Many either lack the ambition, clarity, coverage or accountability needed to make a difference /🧵 [from the *actual* CAT] bit.ly/CAT_COP28_init…

"…transitional fuels can play a role in facilitating the energy transition while ensuring energy security"