Scientist studying climate & energy and lover of disc sports. Senior Research Scholar at @IIASAVienna. Scientific Advisor at @CA_latest. Views are my own.

Vienna, Austria
Joined October 2013
New study by @gauravganti and co-authors shows that for 1.5°C pathways, 90% of the mitigation between 2020 and 2030 will come from emissions reductions: 💨70% CO2 emission cuts 💭20% non-CO2 emission cuts 🌲10% land-based CO2 removals (e.g. afforestation) nature.com/articles/s43247-0…
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On 9-11 July, the IPCC held a Meeting on 'Reconciling Land Use Emissions' at #JRC, with >100 participants from 48 countries, including many world's leading experts in carbon modelling, Earth Observation, and national inventories. Why land use emissions need to be reconciled? 1/7
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What's the status of #CDR development? What's the gap between #CDR plans vs. the #Paris-consistent emissions scenarios? Read the #StateofCDR report - and then visit the #DataPortal to dive into the numbers! Powered by the @IIASAVienna #ScenarioServices. portal.stateofcdr.org
We launched! The 2nd edition of the #StateofCDR report is out now. Go to stateofcdr.org to learn more & download the report & resources. #StateofCDR @CO2REhub @OxfordNetZero
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Matthew Gidden retweeted
Nine key takeaways about the ‘state of CO2 removal’ in 2024 | @daisydunnesci @rtmcswee @TheSmithSchool #StateofCDR Read here: buff.ly/3yO75Ok
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The long-awaited and most comprehensive report on #CarbonRemoval is out! The State of #CDR - Edition 2. With 222 pages full of detailed analysis and overview, it is double the length compared to the first volume. It offers much-needed clarity on terminology, incl sinks, pools, and durability. For the first time, we see an extensive overview of funding, incl for research & innovation, and in start-ups. We learn that today, VCMs play a larger role in financing novel CDR than conventional CDR. Credits issued for afforestation/reforestation represent less than 1% of the total afforestation/reforestation CDR that occurred in 2023. By contrast, pre-purchases for novel CDR well exceeded the total amount removed through novel methods in 2023. The report is heavy on voluntary #carbonmarkets content - something that makes perfect sense today, as the #VCM has helped drive a lot of the innovation. It will continue to play that role (driving experimental solutions), whilst more mature removal activities will eventually be included in compliance markets. However, as VCM won't be anywhere enough to scale removals to needed levels, I hope that there will also be other more impactful (policy) tools being used by the time the next edition of the report is published. The challenge is that policymaking is a slow process, and whilst there have been a lot of developments since the first edition came out 1.5 years ago, we are still far from having extensive governance and policy frameworks for CDR. The ongoing confusion around interpreting and defining residual emission doesn't help. And we see an updated CDR gap. Yes, it's still there and still substantial. The work is cut out for all stakeholders to help make progress on scaling removals, and the State of CDR Report is an impressive resource to rely on going forward. Explore it here: lnkd.in/eq5-vvZG Thanks to everyone involved!
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At @EIAgov, we’ve just released our National Energy Modeling System (NEMS) – used to produce the Annual Energy Outlook – as an open source product, with additional EIA code to follow. github.com/EIAgov/NEMS
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New led by @lamb_wf: the “CDR GAP” @NatureClimate Gap = CDR in Paris scenarios - CDR in national proposals Gap in 2050 is 0.5 to 5.5 GT CO2 per year Rapid emissions reductions necessary regardless of how much CDR Updates in statofcdr.org 2024 coming on June 4 1/5
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New paper led by @energymorgan on feasibility of scaling up direct air capture of CO2 @PNASNews Uses previous tech —> Global Change Analysis Model (GCAM) Result: the feasibility space is large, DACCS meaningful for net-zero…if it grows like some analogs, not if like others 1/
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OUT NOW! Our new study on the many benefitial effect of changing dietary choices towards less meat, less processed food and higher share of unsaturated fats. Result: Big synergies between private health and global climate benefits. science.org/doi/10.1126/scia…
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Matthew Gidden retweeted
Conventional #carbonremoval on land will need to increase. And novel #CDR will need to increase A LOT. A reminder from the 2023 #StateofCDR report. I hear the next version will come out in mid-2024. Looking forward to it! For deciphering the visual: Conventional CDR on land is conventional management of land, primarily via afforestation and reforestation. Novel CDR includes #BECCS, #DACCS, biochar and other novel methods. stateofcdr.org/
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The EU has agreed on the world's first #carbonremoval certification framework! 𝗦𝗰𝗼𝗽𝗲 There will be four types of units: • Permanent carbon removal • Temporary carbon storage in long-lasting products (at least 35 years) • Temporary carbon storage from carbon farming • Soil emission reduction from carbon farming So, emission reductions ended up in the scope of the framework after all. The geographical scope of the activities is limited to the EU. A potential future review might consider allowing geological carbon storage in neighbouring third countries. Enhanced hydrocarbon recovery from permanent carbon removal activities is excluded. Activities and operators in the marine environments are included. 𝗨𝘀𝗲 𝗼𝗳 𝘂𝗻𝗶𝘁𝘀 Certified units can only be used for the EU’s climate objectives and NDC, and should not contribute to third countries’ NDCs and international compliance schemes. (Possibly up for a revision in 2026) I find this puzzling, given that plenty of engineered/industrial CDR methods that rely on CRCF to provide a business case are not within the scope of the EU's climate targets /NDC. Curious to see the final text. 𝗥𝗲𝗴𝗶𝘀𝘁𝗿𝘆 An EU-wide registry will be developed in four years from the adoption of the regulation. Meanwhile, public registries based on automated and interoperable systems will be used. 𝗠𝗲𝘁𝗵𝗼𝗱𝗼𝗹𝗼𝗴𝗶𝗲𝘀 The Commission's expert group on carbon removal has been waiting for the agreement on the framework so it can start preparing the methodologies. • Which #CDR methods will have the methodologies prepared first? • How long will it take? • Will there still be one methodology per CDR method, or will the approach change? We will find out over the coming months. The next expert group meeting will take place on 15-17 April. 𝗪𝗵𝗲𝗻 𝘄𝗶𝗹𝗹 𝘁𝗵𝗲 𝗖𝗥𝗖𝗙 𝗯𝗲 𝗳𝘂𝗹𝗹𝘆 𝗼𝗽𝗲𝗿𝗮𝘁𝗶𝗼𝗻𝗮𝗹? Once the following conditions are met: (1) the regulation is adopted, and (2) the Commission has adopted the first certification methodology, and (3) recognised the first certification scheme. So, the earliest in 2025, possibly in 2026. This provisional agreement still needs to be endorsed by the Council of the EU, and the European Parliament. In practice, such agreements are almost always endorsed. Read the press release: consilium.europa.eu/en/press…
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Surprised to read this in the Nature editorial on CCS in the EU: "There is not a [..] system for governing and regulating the technology". The CCS Directive has been in place since 2009.. - it's carbon removal for which the EU has no proper governance (like all other countries).
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Guest post: Why resolving how land emissions are counted is critical for tracking climate progress | @mattgidden Thomas Gasser @giac_grassi Read here: bit.ly/3RSHREt
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Excellent @mattgidden Thomas Gasser & @giac_grassi on complexities of land-climate interaction & why these better not be mixed up with fossil/process emissions in #climate models or policy. Implies more focus on role of #forest #products for mitigation carbonbrief.org/guest-post-w…
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Matthew Gidden retweeted
🌍Thrilled to share the publication of these figures I worked on in @Nature! Great study by @mattgidden et al. on how land emissions are counted towards #ParisAgreement goals. Unveiling the gaps between scientific models & national GHG inventories—this study is a game-changer! 🎯
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Matthew Gidden retweeted
NEW – Interactive: The pathways to meeting the Paris Agreement’s 1.5C limit | Uta Kloenne, Dr Debbie Rosen, Gaurav Ganti, Dr Alexander Nauels, @CarlSchleussner, @JoeriRogelj, @piersforster, @rtmcswee Design by Tom Pearson and @tomoprater Read here ➡️ bit.ly/3NelFCU
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NEW dataset for exploration and download:   The HATCH, Historical Adoption of TeCHnology, dataset   Massive effort by @jennagreen22 +others @UWLaFollette @MCC_Berlin @IIASAVienna to assemble 1000s of country-level time series on adoption of 200 diverse technologies. 1/
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