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William F. Lamb

@wflamb.bsky.social
7.4K followers 2.6K following 120 posts

Climate policy researcher at the Potsdam Institute for Climate Impact Research. I work on emissions trends, policy evaluation, carbon dioxide removal and climate obstruction. Scot in Deutschland. lambwf.github.io

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Reposted by William F. Lamb
Glen Peters @glenpeters.bsky.social · 21/09/2026
Many countries now report GHG emissions to the UNFCCC. There is a wealth of data, and many stories to tell. Check out the processed data here, via @wflamb.bsky.social lambwf.github.io/Tidy-GHG-Inv...
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Reposted by William F. Lamb
David Ho @davidho.bsky.social · 22/08/2026
I hope 2025 & 2026 have adequately prepared everyone for the shitshow that will be 2027: Strongest El Niño and highest global temperature on record Energy and affordability crisis from the illegal war End of 3-year federal science grants awarded in 2024 AI bubble bursting Continued rise of fascism
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Prof Julia Steinberger 🌹🌱🌍 #ClimateAction #Fightfascism @jksteinberger.bsky.social · 29/06/2026
🚨🥵🚨 💀 🚨 EXTREME CLIMATE HEAT ALERT. Paris is heatwave is back to 40C by next Tuesday. These are deadly conditions, especially for the poor and vulnerable, all over Europe. And this will only get worse, due to fossil fuel corruption of our governments and media. 1/7
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William F. Lamb @wflamb.bsky.social · 29/06/2026
This weekend I learned that even with: - good insulation - window shutters - triple glazing on half our windows (double on the rest) - maximum night-time ventilation ...there is no way to keep our flat naturally cool over such an extended heatwave
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William F. Lamb @wflamb.bsky.social · 24/04/2026
😧 Now do it for electric vehicle, heat pump, solar pv and healthy diet adoption
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William F. Lamb @wflamb.bsky.social · 24/04/2026
I have updated Tidy GHG Inventories - a dataset of greenhouse gas emissions based on country submissions to the UNFCCC. Summary figures: lambwf.github.io/Tidy-GHG-Inv... Dataset: zenodo.org/records/1969... This version has much more detailed energy sector data⚡including the split by fossil fuel 🛢️
lambwf.github.io
Tidy GHG Inventories
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Robbie Andrew @robbieandrew.bsky.social · 09/04/2026
Back in 2020, I wrote a big paper that explained why different datasets of global fossil CO₂ emissions gave different numbers. 📢Now @wflamb.bsky.social has hand-picked a crowd of experts and gone much further: "Differences in anthropogenic greenhouse gas emissions estimates explained", out today.
essd.copernicus.org
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Glen Peters @glenpeters.bsky.social · 10/04/2026
We have a pretty good understanding of the differences between GHG emission estimates, but when it comes to some sectors (e.g., land), estimates seem all over the place! Why is this? @wflamb.bsky.social has you covered... essd.copernicus.org/articles/18/... 1/
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Stephan Lewandowsky @lewan.uk · 09/04/2026
🧵 New report just dropped 🚨 "Fractured Reality: How Democracy Can Win the Global Struggle Over the Information Space" — from the EU Joint Research Centre, led by Mario Scharfbillig and I. A landmark read for anyone working on disinformation, platforms & democracy. 👇 1/10
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Helen Pearson @helenpearson.bsky.social · 18/02/2026
“We can’t be shrinking away from this space,” say the scientists combating misinformation by taking strategies from the influencer playbook. Good feature on what's involved in getting very online by @catrionaclarke.bsky.social @nature.com www.nature.com/articles/d41...
nature.com
The science influencers going viral on TikTok to fight misinformation
Scientists and medical experts are countering climate denialism, vaccine scepticism and wellness pseudoscience on social media.
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Carbon Brief @carbonbrief.org · 19/01/2026
NEW – Analysis: UK newspaper editorial opposition to climate action overtakes support for first time | @joshgabbatiss.bsky.social @sylviahayes.bsky.social Read here: buff.ly/eAPkvkx
Number of UK newspaper editorials arguing for more (blue) and less (red) climate action, 2011-2025. Some editorials also present a “balanced” view, which is categorised as advocating for neither “more” nor “less” climate action. These editorials are not represented in this chart. Source: Carbon Brief analysis.
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PIK_climate @pik-potsdam.bsky.social · 08/12/2025
PIK at #IPCC: Nine PIK scientists joined the first Lead Authors’ Meeting for the 7th Assessment Report on the state of climate science in Paris last week. The meeting marked the start of drafting the 3 Working Group reports: www.pik-potsdam.de/en/news/late... @ipcc.bsky.social @wflamb.bsky.social
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William F. Lamb @wflamb.bsky.social · 24/11/2025
I think one line of evidence for this is the scale of backlash that fossil interests have mobilised against existing and working climate policies - and what happens to renewables, counterfactual emissions, etc. when they get shutdown!
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Reposted by William F. Lamb
Ketan Joshi @ketanjoshi.co · 24/11/2025
It's funny to have to make this case but tbqh we don't make it enough: human efforts to counter fossil fuel use have had *at least some* effect on total greenhouse gas emissions since the signing of the Paris Agreement in 2015, and there's some evidence to back up this position A lil thread 🧵
media.tenor.com
a man is talking about being entirely successful .
Alt: a robot is is talking about not being entirely successful .
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UN Environment Programme @unep.org · 04/11/2025
New national climate plans have barely moved the needle on limiting global warming. Yet there is hope. According to UNEP's latest #EmissionsGap Report, accelerated adoption of renewable energy and falling costs mean we have the tools to cut emissions now: www.unep.org/news-and-sto...
Illustration of a dart missing the bullseye on a colorful target, symbolizing global temperature goals at risk due to inaction.
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PIK_climate @pik-potsdam.bsky.social · 21/08/2025
Expertise from the Potsdam Institute. 8 Lead Authors for @IPCC_CH #AR7: nico bauer Niklas Boers Franziska Piontek Iulii Didovets Barbora Sedova @wflamb.bsky.social Jan Minx Elmar Kriegler First Lead Author meeting Dec 2025, report out 2028/29. www.pik-potsdam.de/en/news/late...
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Prof Friederike Otto @frediotto.bsky.social · 09/07/2025
About 1500 of the approx. 2300 people that will have lost their lives across 12 European cities last week would still live, if it wasn't for our burning of oil, coal and gas. If we care about the right to life, we need to stop burning fossil fuels. www.imperial.ac.uk/grantham/pub...
bar chart showing deaths associate with extreme heat with and without climate change in 12 European cities
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Matthias Schmelzer @matthiasschmelzer.bsky.social · 24/06/2025
Out today: Freedom for Capital not People: The Mont Pèlerin Society and the Origins of the Neoliberal Monetary Order @versobooks.bsky.social
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PIK_climate @pik-potsdam.bsky.social · 23/06/2025
Höhepunkt der Emissionen noch nicht erreicht - Tagesschau Online berichtet über Report „Indikatoren des globalen Klimawandels“. Es werde immer schwieriger, die 1,5 Grad noch zu halten, je länger Emissionen nicht reduziert würden, so PIK Forscher @wflamb.bsky.social www.tagesschau.de/wissen/klima...
tagesschau.de
Höhepunkt der CO2-Emissionen noch nicht erreicht
Während Delegierte aus aller Welt in Bonn die nächste Klimakonferenz vorbereiten, offenbart ein neuer Bericht die fragile Lage des Weltklimas. Die Forderungen nach einem Umsteuern werden immer lauter....
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William F. Lamb @wflamb.bsky.social · 16/06/2025
Just did a small update of Tidy GHG Inventories: lambwf.github.io/Tidy-GHG-Inv... 81 countries have now submitted inventory data with their Biennial Transparency Reports. Quite a few still haven't (its 6 months past the deadline btw).
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William F. Lamb @wflamb.bsky.social · 20/05/2025
The land use change (LULUCF) sector is pretty confusing, since it can be a source of emissions (deforestation, disturbances) as well as a source of removals (regrowth, management). Including LULUCF can speed up, slow down, or change the overall dynamic of economy-wide emissions.
A dot plot comparing the change in national GHG emissions over the past 5 years with (x axis) and without (y axis) the LULUCF sector
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Leo Hickman @leohickman.carbonbrief.org · 15/05/2025
Quite possibly the biggest climate story of the year (especially when we look back on this in a few years' time) For the first time on record, China's emissions are falling due to clean energy growth, not slow power demand...
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Glen Peters @glenpeters.bsky.social · 25/04/2025
Will Lamb @wflamb.bsky.social has pulled the troops together & submitted an article to explain why different datasets can give different estimates of GHG emissions. My favourite: differences in accounting for fire emissions. Article in review, please comment! essd.copernicus.org/preprints/es...
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Reposted by William F. Lamb
Chris Smith @cjsmith.eu · 24/04/2025
New preprint: differences in anthropogenic greenhouse gas emissions explained essd.copernicus.org/preprints/es...
essd.copernicus.org
Differences in anthropogenic greenhouse gas emissions estimates explained
Abstract. We examine differences in global and national greenhouse gas (GHG) emissions estimates and highlight the important role of varying system boundaries and conceptual approaches in driving thes...
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William F. Lamb @wflamb.bsky.social · 24/04/2025
Greenhouse gas emissions are still mostly from fossil fuels by the way!! lambwf.github.io/UNEP-Gap-Rep...
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Glen Peters @glenpeters.bsky.social · 22/04/2025
The EU has released its latest GHG emission inventory, with data up to 2023. The good news, GHG emissions continue a downward trend, currently 37% below 1990 levels. The bad news, a significant downward revision of land-use removals (LULUCF). 1/
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William F. Lamb @wflamb.bsky.social · 18/04/2025
I tried
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Sharon Lerner @fastlerner.bsky.social · 16/04/2025
So the US was supposed to report its greenhouse gas emissions to the UNFCCC yesterday. For the first time since 1997, it didn't. This follows last week's revelation that Trump's EPA is stopping collection of GHG emission from 40 of 41 sectors www.propublica.org/article/trum...
propublica.org
Trump’s EPA Plans to Stop Collecting Greenhouse Gas Emissions Data From Most Polluters
Climate experts expressed shock and dismay at the move. “It would be a bit like unplugging the equipment that monitors the vital signs of a patient that is critically ill,” one said.
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William F. Lamb @wflamb.bsky.social · 16/04/2025
According to Carbon Monitor, emissions could have been 9.8GtCO2 higher in 2024... if renewable energy supply had been met with expected fossil sources instead www.nature.com/articles/s43...
nature.com
Global carbon emissions and decarbonization in 2024 - Nature Reviews Earth & Environment
Global CO2 emissions in 2024 increased 0.9% on the previous year, totalling 36.3 Gt CO2. These ongoing emissions further deplete remaining carbon budgets, with some estimates suggesting the 1.5 °C bud...
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William F. Lamb @wflamb.bsky.social · 09/04/2025
I've updated the Tidy GHG Inventories dataset, which is now complete for Annex I countries: doi.org/10.5281/zeno... This also shows the progress to date in countries submitting Biennial Transparency Reports under the Paris Agreement ⬇️
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Dave Vetter @davidrvetter.bsky.social · 08/04/2025
Prominent climate communicators continue to "joke" that what Trump is doing is "degrowth". It is not, and such claims are actively harmful. A quick🧵
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Timothy Snyder @timothysnyder.bsky.social · 24/03/2025
If you accept that non-citizens have no right to due process, you are accepting that citizens have no right to due process. All the government has to do is claim that you are not a citizen; without due process you have no chance to prove the contrary.
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William F. Lamb @wflamb.bsky.social · 14/03/2025
This looks like a very interesting piece on interest groups at the COPs www.nature.com/articles/s41...
Sankey diagram representing fossil fuel companies and lobbyists and their nominators at COP28
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William F. Lamb @wflamb.bsky.social · 07/03/2025
I asked CLARA - @oxfordsmithschool.bsky.social's new LLM trained on historical climate obstruction documents - about fossil fuel companies' internal discussions and strategies on carbon dioxide removal 😬 clara-research.com
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Katharine Hayhoe @katharinehayhoe.com · 21/02/2025
‼️The US-based @ipcc.bsky.social technical support unit (TSU) for Working Group 3 Co-Chairs has been terminated, and the US won’t be attending next week’s IPCC meeting where the AR7 chapter outlines will be approved. More by @afreedma.bsky.social here:
axios.com
Scoop: U.S. delegation pulled from key U.N. climate science meeting
The IPCC meeting in China is slated to determine the content in the group's next series of reports.
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Dave Vetter @davidrvetter.bsky.social · 18/02/2025
On climate protest, a superb point from @richarddenniss.bsky.social. If protest wasn't effective, govts wouldn't try to ban it. And as much as politicians like to talk about parliamentary logjams, as soon as fossil capital is threatened, they mobilise with extraordinary rapidity and efficacy.
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Diana Urge-Vorsatz @dianaurge.bsky.social · 19/02/2025
I just love this figure from @jksteinberger.bsky.social in their paper on "Discourses of Climate Delay". You can find all the arguments of your colleagues and influencers taking the world in the wrong direction. Perhaps we need another paper rebutting each? www.cambridge.org/core/journal...
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William F. Lamb @wflamb.bsky.social · 17/02/2025
Sweden is one of a handful of countries that has been reporting net negative GHG emissions for a number of years. lambwf.github.io/Tidy-GHG-Inv... If you are wondering "how is that possible?" its because the definition of land use change removals in inventories is very inclusive...
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William F. Lamb @wflamb.bsky.social · 14/02/2025
Here is the issue that has caused so many headaches among climate mitigation researchers - inventory estimates of net land use change emissions differ substantially from global bookkeeping models. lambwf.github.io/UNEP-Gap-Rep...
A figure showing the 7.1 GtCO2 gap between inventory estimates of net land use change estimates and global bookkeeping model estimates.
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William F. Lamb @wflamb.bsky.social · 13/02/2025
I revamped my page with ghg emissions plots and data from the UNEP Emissions Gap Report. 👇 lambwf.github.io/UNEP-Gap-Rep... I'll be adding to this a bit in the coming months.
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William F. Lamb @wflamb.bsky.social · 13/02/2025
We just published a map of climate policy research. It has lots of useful resources, including a new typology of instrument types and a literature hub where you can search for studies by sector and instrument: climateliterature.org#/project/pol... www.nature.com/articles/s44...
nature.com
Machine learning map of climate policy literature reveals disparities between scientific attention, policy density, and emissions - npj Climate Action
npj Climate Action - Machine learning map of climate policy literature reveals disparities between scientific attention, policy density, and emissions
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William F. Lamb @wflamb.bsky.social · 31/01/2025
I collected some thoughts and resources about the "Discourses of Climate Delay" article. Read here: lambwf.github.io/Discourses-o... @jksteinberger.bsky.social @giuliomattioli.bsky.social @timmonsroberts.bsky.social @efesce.bsky.social @stucap.bsky.social
lambwf.github.io
Discourses of Climate Delay
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William F. Lamb @wflamb.bsky.social · 17/01/2025
China's latest national GHG inventory submission (common reporting table) to the UNFCCC ... 🤔
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William F. Lamb @wflamb.bsky.social · 16/01/2025
Countries can classify emissions from wildfires (and subsequent removals from regrowth) as a memo item in their national greenhouse gas inventories, excluding them from the total. So far Australia and Canada have done this - including Australia's massive 2020 wildfire.
A graphic showing national greenhouse gas emissions of Australia and Canada from 1990 to 2022, based on data from their national GHG inventories. Emissions and removals are also shown for the inventory memo "natural disturbances on managed land", which would influence national totals if they were included. The 2020 wildfire in Australia released GHG emissions equivalent to all anthropogenic emissions that year - but a full accounting of the event should also take into account removals from subsequent regrowth, as shown in later years.
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George Monbiot @georgemonbiot.bsky.social · 15/01/2025
1. This is what it’s really about. Farage, Truss and co have no convictions of their own. They are mere channels for the demands of capital. Here they are, supporting a climate science-denying lobby group funded by oil and oligarchs. www.theguardian.com/environment/... 🧵
theguardian.com
Farage and Truss attend UK launch of US climate denial group
British arm of Heartland, which has taken fossil and Republican funding, to be led by ex-Ukip head Lois Perry
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Susie Dent @susiedentwords.bsky.social · 10/01/2025
Word of the Day is ‘uhtcearu’ [ucht-kay-aru, with the 'ch' as in the Scottish ‘loch']: Old English for ‘the sorrow before dawn', when you lie awake in the darkness and worries crowd your mind.
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William F. Lamb @wflamb.bsky.social · 19/12/2024
Two job positions are open to join our team in Berlin. Join us and help to cast a critical eye on progress in carbon dioxide removal and climate mitigation policy making: tinyurl.com/PIKpolicyana... tinyurl.com/PIKpostdoc
A converted red brick industrial building in front of an old gas works. Now the offices of MCC Berlin / PIK in Schöneberg Berlin, where candidates will be working with us.
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William F. Lamb @wflamb.bsky.social · 07/01/2025
One of the frustrations of the German academic funding scene (and presumably elsewhere) is the common requirement for co-financing. a.k.a. "You can apply for this grant, as long as you pay x% of the costs." Fine if you have a core funded position (just count your own time). Not fine if you don't.
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William F. Lamb @wflamb.bsky.social · 19/12/2024
Two job positions are open to join our team in Berlin. Join us and help to cast a critical eye on progress in carbon dioxide removal and climate mitigation policy making: tinyurl.com/PIKpolicyana... tinyurl.com/PIKpostdoc
A converted red brick industrial building in front of an old gas works. Now the offices of MCC Berlin / PIK in Schöneberg Berlin, where candidates will be working with us.
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