Freya Chay
@freyachay.bsky.social
📤 829
📥 365
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Thinking about carbon removal at
@CarbonPlan.org
reposted by
Freya Chay
CarbonPlan
about 1 month ago
Today we’re launching Open Climate Risk, a fully open option for U.S. building-level climate risk data. It’s unique because it allows you to see not only risk scores, starting with wildfire, but also the complete underlying dataset, methods, and codebase.
carbonplan.org/research/cli...
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Freya Chay
CarbonPlan
about 2 months ago
Most carbon removal projects don’t pull CO₂ from the atmosphere instantly — there are temporal lags. We contributed to a new preprint showing why accounting for lags matters for both near-term warming and long-term temperature stabilization. 1/2
carbonplan.org/blog/cdr-tem...
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The need to consistently account for time in CDR – CarbonPlan
We collaborated on a new preprint that establishes clearer language for talking about temporal lags in CDR, and shows how ignoring them can drive near-term warming.
https://carbonplan.org/blog/cdr-temporal-lags
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Freya Chay
CDRXIV
about 2 months ago
Consistent temporal accounting supports credible CDR use.
cdrxiv.org/preprint/302
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Consistent temporal accounting supports credible CDR use – CDRXIV
Carbon dioxide removal (CDR) is increasingly used to support national targets and corporate net-zero commitments, yet the timing of atmospheric drawdown remains poorly represented in carbon accounting...
https://cdrxiv.org/preprint/302
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We have a lot to learn about carbon removal, and we need to learn fast. Open science can help. I’m excited to share CDRXIV, a new platform for early-stage CDR research. Take a look — and if you're working on CDR, consider sharing your work:
cdrxiv.org
add a skeleton here at some point
10 months ago
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Freya Chay
CarbonPlan
10 months ago
Climate change is happening quickly. Solutions research needs to move at a speed that meets the challenge. We're launching
@cdrxiv.org
, a new preprint server for CDR research, because transparency and collaboration help move the field forward. Let’s make better CDR, together:
cdrxiv.org
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CDRXIV
CDRXIV is a new open access platform for sharing preprints and data related to carbon dioxide removal (CDR).
https://cdrxiv.org/
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Freya Chay
CarbonPlan
11 months ago
Want to know how fossil fuel companies use carbon offsets to claim they’re fighting climate change? We've updated OffsetsDB — our offsets database — to allow you to search by carbon credit user. Search "Shell" and see what offsets they're using and when. (1/4)
carbonplan.org/research/off...
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Freya Chay
CDRXIV
about 1 year ago
A Framework for Integrating Spatial Uncertainty into Critical Zone Models: Application to Enhanced Weathering.
cdrxiv.org/preprint/334
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A Framework for Integrating Spatial Uncertainty into Critical Zone Models: Application to Enhanced Weathering – CDRXIV
Spatial heterogeneity introduces uncertainty when characterizing the Critical Zone, especially when sampling is sparse or requires repeated measurements at the same locations. Here, we layout a probab...
https://cdrxiv.org/preprint/334
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Freya Chay
CDRXIV
about 1 year ago
Limited impact on oysters in first-of-its-kind field trial of marine carbon dioxide removal (mCDR) strategy.
cdrxiv.org/preprint/326
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Limited impact on oysters in first-of-its-kind field trial of marine carbon dioxide removal (mCDR) strategy – CDRXIV
Carbon dioxide removal (CDR) is a necessary component of limiting global warming to 2°C by 2100. Marine enhanced rock weathering (mERW) with minerals like olivine is a CDR strategy with the potential ...
https://cdrxiv.org/preprint/326
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Freya Chay
CDRXIV
about 1 year ago
Photosynthesis in Rivers as a Loss Pathway for ERW-Derived DIC and Alkalinity.
cdrxiv.org/preprint/329
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Photosynthesis in Rivers as a Loss Pathway for ERW-Derived DIC and Alkalinity – CDRXIV
As climate mitigation efforts lag, dependence on anthropogenic CO2 removal increases. Enhanced rock weathering (ERW) is a rapidly growing CO2 removal approach. In terrestrial ERW, crushed rocks are sp...
https://cdrxiv.org/preprint/329
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Freya Chay
CDRXIV
about 1 year ago
Assessing CO2 fluxes during enhanced weathering from soils through a mesocosm lens.
cdrxiv.org/preprint/331
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Assessing CO2 fluxes during enhanced weathering from soils through a mesocosm lens – CDRXIV
It is becoming increasingly accepted that annual gigatonne-scale CO2 removal, in conjunction with rapid decarbonization, is necessary to meet international climate goals and limit global warming below...
https://cdrxiv.org/preprint/331
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reposted by
Freya Chay
Zeke Hausfather
about 1 year ago
A year ago @freyachay.bsky.social and I started a big community debate with a piece suggesting that corn ethanol with CCS should not be considered carbon removal. In a new piece today we try and cut through the debate, arguing that "what is CDR" is the wrong question to ask:
carbonplan.org/resea...
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“What is CDR?” is the wrong question – CarbonPlan
We summarize the ongoing debate around what “counts” as CDR, highlighting the trade-offs of each proposed definition. We suggest an alternative set of questions that can provide a more meaningful guide to making effective CDR investments.
https://carbonplan.org/research/defining-good-cdr
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Freya Chay
CarbonPlan
about 1 year ago
There’s an ongoing debate over what should “count” as CO₂ removal. In a new commentary with
@hausfath.bsky.social
, we break down key points of contention, proposed definitions, and why no definition offers a perfect path forward. (1/5)
carbonplan.org/research/def...
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“What is CDR?” is the wrong question – CarbonPlan
We summarize the ongoing debate around what “counts” as CDR, highlighting the trade-offs of each proposed definition. We suggest an alternative set of questions that can provide a more meaningful guid...
https://carbonplan.org/research/defining-good-cdr
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reposted by
Freya Chay
holly jean buck
about 1 year ago
What ever happened to transparency in solar geoengineering research? a 🧵 of reflections on our new opinion article in PNAS
www.pnas.org/doi/10.1073/...
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How to address solar geoengineering’s transparency problem | PNAS
How to address solar geoengineering’s transparency problem
https://www.pnas.org/doi/10.1073/pnas.2419587122
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Freya Chay
Mike Brown
about 1 year ago
Just had a sample of the Eaton Fire ash that is in my driveway run on the department XRF. Is there titanium (new house paint)? Yup. Lead (old house paint)? You betcha. Heavy metals? Check. Treat that ash like it's toxic folks (because it is)
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Freya Chay
Danny Cullenward
over 1 year ago
A group of current and former members of the expert panel of the carbon crediting industry's self-regulatory body, the ICVCM, have a post objecting to the ICVCM's approval of three tropical forest carbon REDD methodologies. A very timely and important read:
www.oeko.de/blog/the-icv...
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The ICVCM approval of three REDD methodologies presents risks to the integrity of the initiative
In November 2024, the Governing Board of the Integrity Council for the Voluntary Carbon Market (ICVCM) approved three methodologies for reducing emissions from deforestation and forest degradation (RE...
https://www.oeko.de/blog/the-icvcm-approval-of-three-redd-methodologies-presents-risks-to-the-integrity-of-the-initiative/
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Freya Chay
David Ho
over 1 year ago
Hey people working on marine CO₂ removal (mCDR), post your preprints to CDRXIV (pronounced C-D Archive). 🌊
add a skeleton here at some point
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Freya Chay
Eric Roston
over 1 year ago
An All-Star roster of climate scientists cleared their throats recently and it was something to behold. Their message to Net-Zero experts in every sector? You're Doing It Wrong 🧪
www.bloomberg.com/news/article...
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Scientists Behind ‘Net Zero’ Concept Say Nations Are Getting It Wrong
In a new study, high-profile climate scientists say countries are using flawed carbon accounting by relying too heavily on trees and oceans to absorb new carbon emissions.
https://www.bloomberg.com/news/articles/2024-12-03/scientists-behind-net-zero-concept-say-nations-are-getting-it-wrong?accessToken=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzb3VyY2UiOiJTdWJzY3JpYmVyR2lmdGVkQXJ0aWNsZSIsImlhdCI6MTczMzMyNzM1MCwiZXhwIjoxNzMzOTMyMTUwLCJhcnRpY2xlSWQiOiJTTlg1R0ZEV1gyUFQwMCIsImJjb25uZWN0SWQiOiJGMkY1NTFERTc4ODA0RkJBOTk5NEFBMTQ5RTM1NjQ3RCJ9.dXQ3ra_cY9W4vaE6qfvIbGvc-6uyb0rMWVymAXbWwgU
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Freya Chay
Josh Lappen
over 1 year ago
Ok, first train+decarb content of the day returns me to the first climate project I ever worked on: How to appropriately dispose of fossil assets that are decommissioned before end of life. It's a puzzle that's becoming ubiquitous, but mostly flying under the radar.🔌💡(1/20)
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Freya Chay
Zeke Hausfather
over 1 year ago
A veritable whos-who of the scientists behind our physical climate understanding of net-zero have a new paper in Nature, making the case for "Geological Net Zero" where fossil CO2 can only credibly counterbalanced by permanent removal:
www.nature.com/artic...
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Freya Chay
CarbonPlan
over 1 year ago
In January, AB1305 will start requiring California companies to report which offsets they use. A few have already started making these disclosures, revealing big challenges — data is hard to find, often incomplete, and tough to analyze. Read our recommendations: 🧪
carbonplan.org/research/ab1...
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Analyzing initial offset disclosures under California’s AB1305 – CarbonPlan
Early disclosures demonstrate the power of transparency, but also highlight the opportunity for improvements around discoverability and usability.
https://carbonplan.org/research/ab1305-initial-disclosures
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Freya Chay
David Ho
over 1 year ago
What if you could click anywhere in the ocean and figure out where released alkalinity would go, how much it would change surface ocean pCO₂, and how much carbon dioxide removal (CDR) you would get? Now there's a way, from
@cworthy.bsky.social
and CarbonPlan. 🌊
carbonplan.org/research/oae...
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Freya Chay
David Ho
over 1 year ago
We're looking for a Senior Software Engineer at
@cworthy.bsky.social
to help build a system to support standardization of carbon removal accounting and environmental impact assessments related to deployments of marine carbon dioxide removal (mCDR) technologies. Please share with your network. 🌊🧪
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Convergent Research - Senior Software Engineer
[C]Worthy is building a software system – called C-Star – to support standardization of carbon removal accounting and environmental impact assessments related to deployments of marine carbon dioxide r...
https://jobs.lever.co/convergentresearch/fc199e45-bb6b-4b66-b16d-ca32122693b2
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Freya Chay
Ali Sheridan
over 1 year ago
“These tech giants are poised to become some of the biggest energy users of the future…Ahead of that, they are working behind the scenes to shape a once-in-a-decade rewrite of the rules governing how pollution from power use is disclosed.”
www.ft.com/content/2d6f...
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How Big Tech is quietly trying to reshape how pollution is reported
Critics say a proposed rule change backed by Amazon and Meta could allow large energy users to hide their true emissions
https://www.ft.com/content/2d6fc319-2165-42fb-8de1-0edf1d765be3
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reposted by
Freya Chay
CarbonPlan
over 1 year ago
We also aren’t the only people concerned about the lack of transparency in private climate risk prediction. Bloomberg also published a feature today that also found differences between companies in an analysis independent from ours. (8/8)
www.bloomberg.com/graphics/202...
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The Risky Business of Predicting Where Climate Disaster Will Hit
Climate tech companies can calculate the chances that a flood or wildfire will ravage your home. But what if their odds are all different?
https://www.bloomberg.com/graphics/2024-flood-fire-climate-risk-analytics/?accessToken=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzb3VyY2UiOiJTdWJzY3JpYmVyR2lmdGVkQXJ0aWNsZSIsImlhdCI6MTcyMzIxOTgwOCwiZXhwIjoxNzIzODI0NjA4LCJhcnRpY2xlSWQiOiJTSFlLR0VEV1gyUFMwMCIsImJjb25uZWN0SWQiOiI5RjJFMEMxNDRGQkY0Q0M1OUJCRDA3MzQ0QkI2RUZDNCJ9.v2mR0nS7tJbnNJ23UVEKn98Ev917FWYgcoWm7TttUJ4
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reposted by
Freya Chay
CarbonPlan
almost 2 years ago
Enhanced rock weathering is a carbon removal technique gaining lots of attention, but we’re still figuring out best ways to do it. In collab with
@climatejesper.bsky.social
, we synthesized scientific results to explain what we know, and grapple with what we don’t.
carbonplan.org/research/enh...
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Does enhanced weathering work? We’re still learning. – CarbonPlan
A synthesis of carbon removal estimates from the enhanced weathering literature.
https://carbonplan.org/research/enhanced-weathering-fluxes
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reposted by
Freya Chay
CarbonPlan
about 2 years ago
Carbon credits are everywhere, but the data about where they come is hard to track down and difficult to work with. OffsetsDB is a new database that collects, standardizes, and provides daily updates of offset project data from five of the largest registries.
carbonplan.org/research/off...
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OffsetsDB – CarbonPlan
A harmonized database of carbon offset projects and credits.
https://carbonplan.org/research/offsets-db
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Freya Chay
Danny Cullenward
about 2 years ago
I wrote a pair of short blog posts on the climate value of temporary carbon storage, now available at the Kleinman Center for Energy Policy at Penn. Part 1 explains why temporary offsets are *not* equivalent to the permanent harms of CO2 emissions.
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Why Temporary Carbon Storage in Forests Has Little Climate Value: Part 1 - Kleinman Center for Energ...
Energy policy research from the University of Pennsylvania
https://kleinmanenergy.upenn.edu/news-insights/why-temporary-carbon-storage-in-forests-has-little-climate-value-part-1/
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Freya Chay
Emily Grubert
over 2 years ago
Earlier this year I (with Frances Sawyer) published a paper suggesting the 45Q CCS tax credit is structured in a way that could incentivize huge costs + increased GHG emissions from the US power sector. DOE rebutted it, and we were allowed to reply. Those pieces are up today:
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Reply to 'A commentary on "US power sector carbon capture and storage under the Inflation Reduction ...
https://iopscience.iop.org/article/10.1088/2634-4505/ad0ff1
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Freya Chay
James Temple
over 2 years ago
Exclusive: UC researchers were tasked with finding carbon offsets the university system could rely on to cancel out emissions. But they couldn't. Now, all 10 campuses are being charged a carbon fee that will be invested into direct emissions reductions instead.
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The University of California has all but dropped carbon offsets—and thinks you should, too
It uncovered systemic problems with offset markets and recommended that the public university system focus on cutting its direct emissions instead.
https://www.technologyreview.com/2023/11/30/1084104/the-university-of-california-has-all-but-dropped-carbon-offsets-and-thinks-you-should-too/
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Freya Chay
David Ho
over 2 years ago
🧵In the newly published Best Practices Guide to Ocean Alkalinity Enhancement (OAE) Research, we make recommendations for monitoring, reporting, and verification (MRV), the multistep process to quantify the amount of CO₂ removed by OAE, a promising CO₂ removal technique. 1/5
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Freya Chay
Danny Cullenward
over 2 years ago
Carbon removal policy and net-zero governance researchers: please consider joining me in signing an open letter to EU policymakers from Carbon Market Watch on carbon removal safeguards. Letter text:
drive.google.com/file/d/1_E9I...
Sign-on form:
forms.monday.com/forms/e2c0e9...
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Freya Chay
Danny Cullenward
over 2 years ago
I wrote about California Governor Gavin Newsom's ambivalence toward corporate climate accountability laws for
@heatmap.news
, drawing on his response to four new bills the state legislature sent to his desk this year. tl;dr one veto and two hostile signing statements that could chill implementation
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Gavin Newsom Is Weaker on Climate When the Cameras Aren’t Rolling
There’s a growing disconnect between the governor of California’s words and actions.
https://heatmap.news/politics/gavin-newsom-climate-change-greenwashing-sb-253-261-390
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Freya Chay
Danny Cullenward
over 2 years ago
Heidi Blake has a long piece in the New Yorker on carbon offsets. No matter how bad you think things are, the people involved in big projects keep telling us how much worse things actually are.
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The Great Cash-for-Carbon Hustle
Offsetting has been hailed as a fix for runaway emissions and climate change—but the market’s largest firm sold millions of credits for carbon reductions that weren’t real.
https://www.newyorker.com/magazine/2023/10/23/the-great-cash-for-carbon-hustle
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Freya Chay
Zeke Hausfather
over 2 years ago
There is increasing evidence that the world has warmed faster over the past 15 years than it has since the 1970s. Surface records, ocean heat content, and the Earth's energy imbalance all support an acceleration of warming, as I argue in today's
@nytimes.com
:
www.nytimes.com/2023/10/13/o...
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