pyCMAT is a python port of (some of) John Fasullo's CMAT climate diagnostic package. It produces nice comparative graphics and html summariees of ESM performance between versions, and can download CMIP6 data for comparison. github.com/benmsanderso...

An update of my figure on atmospheric CO2 increases (rdcu.be/buifD). The atmospheric increases each year, in line with CO2 emissions, but has large variability due to El Nino (reds) and La Nina (blues). Has the increase slowed? Statistically, that is hard to say... 1/

📺Kort oppdatering om verdens utslipp av CO₂ fra meg under CICERO-dagen i forrige uke (på norsk). Etter meg følger dyktige kollegaer som snakker om status på verdens klima.

Some interesting statistics from @thehonestbroker.bsky.social, & this is after expanding the steering committee to include more from the Global South! It would be interesting to compare to CMIP6 ScenarioMIP gmd.copernicus.org/articles/9/3... and Moss et al www.nature.com/articles/nat... 1/

Carbon Dioxide Removal (CDR) in the next two decades is a rounding error compared to emission reductions. If CDR fails we are still close to net zero, but if emission reductions fail we have zero chance of net zero! Don't agree much with this article www.nature.com/articles/d41...

Big jump in the share of BEVs in new car sales in Colombia in March. robbieandrew.github.io/carsales/?la...

The waves of deliveries in Norway. In early November 2025, Tesla couldn't promise those placing new orders delivery before the tax rules changed from 1 Jan, so they introduced a 'Tesla bonus': order before 31 Dec and Tesla paid the extra VAT, with delivery before end of March. Hence:

#india We're launching a series of brief monthly snapshots providing an overview of recent developments shaping India’s climate and energy landscape. The first issue is out now! "An Unexpected Slowdown: Why India’s Emissions Growth Stalled in 2025" Check it out :-)

India’s emissions story just took an interesting turn. Check out the first snapshot from our EMPHASIS project www.ecpulse.in Despite ~7.5% economic growth, CO₂ emissions rose only 1.1% in 2025 — far below the ~4% decade average.

“Scenarios have focused on how fast we can decarbonise together. We need scenarios on how to do it in a fractured world” – @benmsanderson.bsky.social A key takeaway from a today’s @cicero.oslo.no conference. Now thinking of how scenarios can be used for testing robustness of new climate policies

Clouds moderate Amazon deforestation’s climate effect | Science @science.org www.science.org/doi/10.1126/...

Many countries combine GHG emissions and removals to get net emissions. On this accounting, Sweden has reduced its emissions from 12MtCO2-eq in 1990 to -7MtCO2-eq in 2024, a reduction of 160%! Sweden is net zero GHG emissions, already as of 2023. There there are many buts... 1/

The US Energy Information Administration expects (baseline scenario) consumption of coal in the US to drop dramatically in the coming decades. This from their April 2026 Annual Energy Outlook. www.eia.gov/outlooks/aeo/

The Indian government (and media) are touting a massive increase in connections to piped natural gas (PNG) as a result of policy response to the energy crisis induced by the war in Iran. PNG is better than LPG. Can't say I'm seeing it in the data. Every March jumps a little: end of the fiscal year.

The numbers are in. Battery-electric cars made up 19.4% market share in Q1 in the EU, 20.2% in March.

Yes, December was a peak month, because of front-loading of purchases by companies. A major trade-in subsidy scheme to get older trucks off the road expired at the end of the year, and higher taxes were expected. Of course, pointing to one month's figures doesn't tell you what the trend is. 1/4

Most developed countries have now submitted the 2026 editions of their formal greenhouse gas emissions inventories to the UNFCCC. You can check out how their 2026 edition compares to earlier editions on my website: robbieandrew.github.io/country/?cou...

Please read. We faced the same nonsense in the media back in 2022. Germany announced that it would bring some coal-fired power plants back into standby mode, just in case. The media? "Germany returns to coal". The reality? A tiny blip.

Sometimes it takes a while to figure out what your methane emissions *really* are... robbieandrew.github.io/country/?cou...

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/

China's sales of BEVs bounced back in March, following the normal Q1 pattern. Various factors drive this pattern: ▸End-of-year employee bonuses ▸End-of-year push to get inventory sols ▸Start-of-year policy changes ▸Major holidays in Jan/Feb robbieandrew.github.io/carsales/?la...

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.

So... now we can breathe again. Let's talk about ScenarioMIP. The final version is now up on GMD - and there's some changes since the first draft. /THREAD/ gmd.copernicus.org/articles/19/...

I, for one, am enormously happy that the ScenarioMIP extensions are finally finished...

New review paper on black carbon: rdcu.be/fci3J

🔓️ 🇩🇰 Katrine Skagen @cicero.oslo.no investigates how Denmark became the first country to introduce #carbonpricing on agricultural emissions: through clear long-term #NetZero targets, positive politicisation & integration in a larger policy portfolio with substantial funding & revenue recycling ⬇️

UK BEV sales basically on trend. March is a very big month, so higher numbers for all categories, but as a share: on trend. The required target for the year is 33% BEV share, so that's going to be a push. robbieandrew.github.io/carsales/?la...

The CESM workshop -is- happening in June in Boulder :) Details to be found here: www.cesm.ucar.edu/events/works...

The US EIA have just revised down again their forecast growth for US CO₂ emissions in 2026, to -2.4%, with a much milder March than had been forecast. Despite a large increase in prices of oil products, they see little change in consumption. More interpretive figures: robbieandrew.github.io/USA/

After several years of decline, is the Norwegian land use, land-use change, and forestry (LULUCF) sink making a recovery? This is so hard to know, as there are so many factors in different directions. robbieandrew.github.io/country/?cou... 1/

How on earth was it possible to secure political support for a carbon tax in the agricultural sector in Denmark? This article by the fabolous Katrine Skagen gives you the answer. www.tandfonline.com/doi/full/10.... @cicero.oslo.no

Big surge in EV sales in South Korea in February as this year's subsidies kicked in. EVs reached 29% of market share, the highest ever. robbieandrew.github.io/carsales/

What stands out perhaps most here is how much oil demand electric two- and three-wheelers have avoided. Most talk in developed countries is about passenger cars, but the transition to electric among these smaller vehicles in developing countries has been huge. www.bloomberg.com/news/article...

After several years of a declining sink, LULUCF is making a recovery in Sweden. The 2026 GHG inventory submission has a sizeable revision to LULUCF in the last years. robbieandrew.github.io/country/?cou...

The enlightenment realised. Simultaneously futuristic and ancient, the Mesa lab is a building from an alternative timeline, one where we built monuments to science rather than gods or money or power. It betrays scale - with no relatable features on the outside, it merges with the mountain.

The US EIA is expecting electricity demand in Texas to increase by 10%-15% between 2025 and 2027. After two decades of zero growth in electricity in the US, data centres are pushing huge change. www.eia.gov/todayinenerg...

What happens to the climate system when global CO2 emissions reach zero? We all know that the temperature stops rising (stays approximately constant), but there are a few implications... rdcu.be/e73i4 1/

Publication alert! New paper on international climate politics! Multilateralism is on decline and international cooperation is getting messier. International climate politics is full of public-private collaboration and informal intergovernmental organizations. How does this work? 1/2

«If you rule out the fast phase out of fossil fuels, then you have to either remove carbon from the atmosphere, or reflect sunlight. Who decided that geoengineering was more feasible than rapid fossil fuel phase out?»

The third #EYECLIMA Outlook is published, summarising all the deliverables in the third year of the EYE-CLIMA project. Check it out: eyeclima.eu/products/eye... Here is a snapshot of one deliverable, identifying point sources of CH4 using satellites.

"...the higher the peak temperature, the more difficult it is to reverse temperature below critical levels and the longer it’s likely that we’ll remain in ‘overshoot’.” - @njsteinert.bsky.social, @cicero.oslo.no #ClimateEmergency

If... "you screw up your economy trying to drastically reduce your emissions" Ah, which country is doing that (or even trying to do that)? Countries deploying wind, solar, EVs, etc, seem to be doing just fine to me. Modelling does not suggest that climate policy screws your economy either. 1/

📢Big surge in new-energy heavy truck sales in China in December to meet policy targets and rushing to get ahead of policy changes. In December, only 31.2% of heavy trucks were diesel, and for the full year 46.4%.

The numbers are in. ▸Tesla sales in the EU in 2025 down 37.9% compared to 2024. ▸EU battery-electric share rose to 17.4%.

Oh yes, we wrote about that in 2019, then there was COVID, then Ukraine, then we thought the end of gas was around the corner. No. Gas will probably keep putting upward pressure on emissions in the years ahead, even if coal tanks: rdcu.be/bYf1O 3/3

The International Energy Agency (IEA) has regular reports (monthly, quarterly) which provide short-term projections of coal, oil, & gas. As of January 2026, it looks like fossil CO2 emissions in 2026 will be relatively flat: the drop in coal (-1%) offset by growth in gas (2%) & oil (0.8%). 1/

I'm not sure I entirely understand. We're approaching a glut of LNG with both the US and Qatar in particular ramping up capacity to export, among others. Because it's on ships, Europe can buy it from anywhere. Pipes are something else entirely. 🎁🔗

Just updated: USA, California (two sources), Singapore. The bounce induced by policy change in the US is clear in the data. robbieandrew.github.io/carsales/

Fascinating figure from the EIA. The part at the bottom highlights the repeated patterns of policies reaching end of life, and being renewed again. Over and over again. A consequence of this was that EIA's projections, based on current policy, kept saying that US wind installations would stall.

"No non-radical pathways" is a climate soundbite I think we should all talk about more... @kevinclimate.bsky.social