I want to wish all my followers on Bluesky, and my subscribers on Climate Uncovered over on Substack, the very best for the Holiday Season and for the New Year. I look forward to bringing you more science paper reviews and articles in 2026. Thank you for your support.

A new study has examined 5.7 million years of mid latitude rainfall to examine the pattern of hydro climate extremes. 300m lacustrine sediments cores were drilled and analysed for the work. www.nature.com/articles/s41... #climatechange #jetstream #hydroclimate #drought #flood #arcticamplification

Jump in SSTs 2023-24 from dual tropical Pacific warming centres & eastward-extended North Atlantic jet stream, boosted by a large global energy imbalance driven by rising grenhouse gases & falling aerosol that was exacerbated by preceding extended La Niña heat sequestration: doi.org/10.1038/s432...

The US has already lost 12% of its current income due to climate change. Most studies project future losses, but new research from the University of Arizona has calculated the costs to date. news.arizona.edu/news/climate... #climatechange #economy #income #impacts #supplychains

Well worth 1 hour and 8 minutes of your time 👇

Spotted this rare Red Rainbow this morning just after dawn. Just lovely 🌈 Apparently it's caused by most of the green, blue and yellow light from the low sun being scattered by the atmosphere, leaving mostly red light for the rainbow.

My pick of a Top-10 list of insightful climate science papers of 2025. It’s been a very busy year with a huge amount of top quality, well considered and executed, peer reviewed research. drtomharris.substack.com/p/my-top-10-... #climatechange #research #globalwarming

Ten years after the Paris Agreement, CCAG Chair Sir David King reflects in TIME on what has been achieved, and what must change. Read the full article here: time.com/7340848/pari...

Emerging cold-fresh/warm-salty dipoles in the N Atlantic during 2014 with implications for ocean circulation - more analysis with my Dad in @tandfresearch.bsky.social! doi.org/10.1080/0705... Animation of OSCAR estimated ocean currents just for fun ⬇️

Must watch from Yellow Dot!

Essential weekend viewing in bite sized episodes. The superb and informative National Emergency Briefing that was held in Westminster recently is now available on YouTube speech by speech. www.youtube.com/@nebriefing #climatechange #NEBriefing #nature #action

The little ARGO that could. ARGO floats pepper the world’s oceans repeatedly diving to collect vital measurements but one special float just spent 8 months under an Antarctic ice shelf. During its 300km journey it collected 200 profiles from the base of the floating ice to the sea bed.

Permafrost is melting with emissions of carbon dioxide and methane on a par with Japan’s human emissions. Soon they will overtake India’s. drtomharris.substack.com/p/permafrost... #climatechange #permafrost #cryosphere #melting #emissions #CDR #carbonbudget #tippingpoint #arctic

The Paleocene-Eocene Thermal Maximum (PETM) is one of the closest analogues for modern global warming. A new study of plants response through migration and evolution sheds light on future adaptation and carbon cycling. www.nature.com/articles/s41... #climatechange #PETM #Paleoclimate #carboncycle

Collapse of key Atlantic current could bring extreme drought to Europe for centuries, study finds. @swinda.bsky.social That's an under-appreciated impact of #AMOC shutdown, of particular concern given the recent results showing much higher likelihood of this. 1/2 www.livescience.com/planet-earth...

A good article in Forbes covering the recent National Emergency Briefing in London last week 👇 www.forbes.com/sites/claire... #climatechange #emergency #crisis

NOAA are predicting the return of El Niño conditions later in 2026. The last one, in 2023 had a dramatic effect on global temperatures and extreme weather events. What can we expect from the next one? drtomharris.substack.com/p/the-el-nin... #ElNiño #climatechange #ENSO #drought #flood #weather

Here is an excellent summary of last week's National Emergency Briefing in London. Well worth a watch and please sign the letter to the Prime Minister linked at the end. www.youtube.com/watch?v=8sa7... #climatechange #impacts #energy #health #tippingpoints #nationalsecurity #foodsecurity

Africa’s forests have joined the Brazilian Amazon and Australian forests in becoming carbon sources rather than sinks. Around 2010 the previous storage of our carbon emissions flipped, mainly through deforestation and degradation. www.nature.com/articles/s41... #climatechange #deforestation #Africa

Good summary here on Yesterday's National Emergency Briefing on climate and nature held at Westminster. Hundreds of MPs, Peers, leaders of business, sports, faith and others heard directly from 8 renowned scientists about the urgent threat posed to the UK. www.theguardian.com/environment/...

A UK phycology study points to a need for better wording choices by the IPCC to communicate climate risks. In the study words like “unlikely” suggested division or skepticism which is not the situation. www.nature.com/articles/s41... #climatechange #phycology #communication #risk #IPCC #AR7

The 2025 Lancet Report on Health and Climate Change and the recent Cradle to Grave Report spell out the tremendous harm and suffering caused by fossil fuel burning and resulting climate changes. Millions are dying every year. drtomharris.substack.com/p/breathless... #climatechange #health

This is a long read, but an essential one 👇 Please take the time to absorb the consequences of our inaction.

A second opportunity to examine the cloud reduction effects from shipping fuel pollution measures has revealed that the 80% cut in sulphur emissions reduces cloud droplet formation by 67%. acp.copernicus.org/articles/25/... #aerosols #climatechange #clouds #IMO2020 #ECS

“Cold kills more than heat” is a common comment on climate change posts, as if that makes global warming a good thing. George Monbiot dives into the data behind this claim in the Guardian. www.theguardian.com/commentisfre... #climatechange #heatexposure #cold #mortality

Daily extreme precipitation over land increases ~40% by 2100 in high resolution single model ensemble under high greenhouse gas emissions scenario with over half driven by enhanced mesoscale convergence that's underestimated by factor of 3 in low-resolution simulations: doi.org/10.1038/s415...

As well as protecting health, China’s efforts at cleaning up aerosol particle pollution has restored sunlight to Pacific Ocean, once robbed by the haze that was artificially brightening clouds, which unfortunately adds to warming - @uk.theconversation.com podcast: theconversation.com/how-china-cl...

Both are big wins for the climate, and show that real progress happens when countries join forces. Read the full announcement: www.ccacoalition.org/news/ministe...

As well as rapidly cutting CO2 emissions, tackling short-lived warming agents like methane & surface ozone pollution boosts action to limit #climate warming + counteracts warming from cleaning our air of harmful aerosol particles that have robbed us of sunlight: theconversation.com/the-fast-fix...

The latest research confirms AMOC weakening together with a tipping point that is getting closer and closer. Governments are starting to notice with Iceland the first to declare it a national security threat. drtomharris.substack.com/p/amoc-weake... #climatechange #amoc #adaptation #tippingpoint

Sunday 11/16 at 10am PT on Climate Chat: 'Doomsday Glacier' Update with climate scientist Eric Rignot. What happens in Antarctica does not stay in Antarctica! #ClimateChange #Antarctica #SeaLevelRise @leonsimons.bsky.social @bikingmzstacey.bsky.social @radsci.bsky.social youtube.com/live/iarx9Pi...

Carbon Brief have a thorough analysis of the latest Global Carbon Budget report for 2025 that provides a good summary of the findings and implications. Well worth reading, but here are some high/low lights 🧵👇 www.carbonbrief.org/analysis-fos... #emissions #carbonbudget #fossilfuels #landusechange

This is a very mature and sensible conversation on a difficult topic that more people should know about 👇

COP events drive the annual climate reporting season. The State of the Cryosphere 2025 report however, stands out. The report shows that critical thresholds have already been exceeded - its a must read. My summary and thoughts: drtomharris.substack.com/p/we-cannot-... #climatechange #cryosphere

How possible is it to rescue 1.5ºC? A new report timed for the start of COP30 from Climate Analytics and PIK sets out a revision of the IPCC AR6 1.5ºC scenario which they call Highest Possible Ambition. #climatechange #netzero #emissions #scenarios

Whilst its easy to get used to scary graphs, this one made me pause! The 2025 State of the Cryosphere report published yesterday has this one overlaying observations of #AMOC slowdown against model predictions. The report states that “AMOC shutdown appears all but inevitable”

More evidence of the strong aerosol masking effect was published today. A new Nature paper attributes 70% of the cloud reduction over the north Pacific and Atlantic to aerosol reductions. www.nature.com/articles/s41... #climatechange #aerosols #albedo #ECS #acceleration

As we navigate the explosion of Artificial Intelligence, there is a great deal of both hope and dread about its impact on the climate. In this article, Prof of Artificial Intelligence John MacIntyre and I carry out a deep dive into the issues.  drtomharris.substack.com/p/will-ai-sa...

The Global Average Sea Surface Temperature is now very similar to 2015. See if you can spot some regional differences: 1/2

What can coffins can tell us about climate? 2,200 years ago a wealthy soldier was buried in a grave on the frontier of the Han Dynasty territory in western China. Whilst the archaeology is interesting, the wood of his coffin is invaluable to dendrochronologists. www.science.org/content/arti...

If you ever thought science was too tame a career, how does kite skiing 4,000km across Antarctica over 3 months sound? #antarctica #adventure #expedition #science #climatechange

"An important predictor of future warming is Earth's energy imbalance [..] It is rising much more quickly than predicted by most climate models, possibly because of a darker planet corresponding to a large decrease in Earth's albedo which is near an all-time low "

A very good coffee break read on a busy Friday 👇 r3genesis.substack.com/p/200-how-re... #climatechange #naturebasedsolutions #climatesensitivity #weather #aerosols #geoengineering

The annual 10 new insights in climate science are here! Perhaps the best way to keep up with climate science news of the past year, made for lay people, policy makers and scientists alike with its different levels of detail: from simple tiles to a journal paper. 10insightsclimate.science#explore

Whilst a lot of what Bill Gates wrote in his memo makes a certain amount of sense, his main point that short term emissions reduction is not the priority is based on flawed and out of date data. I’ve scribbled on his graph below to add a very important line - reality. #climatechange #acceleration

WTF! It's just scaling up - non-linear increasing moisture transport over a fast warming maritime continent driven by e.g. event based peaking trade winds and tropical storm formation - it's also kind of synchronization of regional feedbacks with the NP MHW playing an increasing role...

Rapid warming from rising greenhouse gases + declining aerosol particle pollution are worsening extremes, depleting groundwater & limiting carbon uptake by land - #10ClimateInsights: 10insightsclimate.science

Whilst headlines quite rightly cover the devastation from Hurricane Melissa, a storm made more deadly through climate change, spare a thought for Vietnam where 1.7 meters (yes 5’7”) of rain fell in 24 hours. phys.org/news/2025-10... #climatechange #hurricane #Melissa #Jamaca #Vietnam #flooding

Worried about shutdown of the Atlantic overturning circulation #AMOC? The collapse of the subpolar gyre is a likely step on the way to that and could happen a lot sooner. Not quite as bad as full AMOC shutdown, but could bring major impacts already in 10-20 years. Important study on the mechanism ⬇️!

What was behind the 2024 record jump in atmospheric CO2 concentrations? A massive 20% of human emissions that should have been absorbed by the land and oceans was left in the atmosphere. drtomharris.substack.com/p/are-earths... #climatechange #co2 #emissions #carbonsinks #wildfires #enso #oceans