Dr Tom Harris
@drtomharris.bsky.social
UK based Climate Science Writer & Advocate writing on Substack under Climate Uncovered.
Soon to be retired Management Consultant specialising in Government funded R&D.
Soon to be retired Management Consultant specialising in Government funded R&D.
Reposted by Dr Tom Harris
Your 'moment of doom' for Jan. 3, 2026 ~ Transitioning to doom.
"More hydrogen means less OH [hydroxyl radicals] in the atmosphere, which means methane persists longer and thus warms the climate for a longer period"
blackout-news.de/en/news/hydr...
"More hydrogen means less OH [hydroxyl radicals] in the atmosphere, which means methane persists longer and thus warms the climate for a longer period"
blackout-news.de/en/news/hydr...
Hydrogen emissions are fueling climate change - study reveals the risks of the energy transition
New scientific study from Stanford University proves: Hydrogen emissions indirectly increase warming
blackout-news.de
January 3, 2026 at 2:29 PM
Your 'moment of doom' for Jan. 3, 2026 ~ Transitioning to doom.
"More hydrogen means less OH [hydroxyl radicals] in the atmosphere, which means methane persists longer and thus warms the climate for a longer period"
blackout-news.de/en/news/hydr...
"More hydrogen means less OH [hydroxyl radicals] in the atmosphere, which means methane persists longer and thus warms the climate for a longer period"
blackout-news.de/en/news/hydr...
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.
I look forward to bringing you more science paper reviews and articles in 2026.
Thank you for your support.
December 23, 2025 at 9:22 AM
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.
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
www.nature.com/articles/s41...
#climatechange #jetstream #hydroclimate #drought #flood #arcticamplification
Westerly jet waviness modulates mid-latitude hydroclimate variability - Nature Communications
This study provides robust evidence that Arctic warming affects precipitation variability in the mid-latitudes by modulating westerly waviness. Under global warming, extreme precipitation events in mi...
www.nature.com
December 22, 2025 at 12:26 PM
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
www.nature.com/articles/s41...
#climatechange #jetstream #hydroclimate #drought #flood #arcticamplification
Reposted by Dr Tom Harris
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...
December 19, 2025 at 12:21 PM
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
news.arizona.edu/news/climate...
#climatechange #economy #income #impacts #supplychains
Climate change's hidden price tag: a drop in our income
By linking decades of weather and income data, University of Arizona economist Derek Lemoine shows how routine temperature shifts have already become an economic force.
news.arizona.edu
December 18, 2025 at 9:49 AM
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
news.arizona.edu/news/climate...
#climatechange #economy #income #impacts #supplychains
Well worth 1 hour and 8 minutes of your time 👇
1 hour 8 minutes? You probably don't have the time. But in case you do, here is a recording of my @gsiexeter.bsky.social seminar at @exeter.ac.uk earlier this week in which I talk about overshoot, consequences and possible ways forward.
www.youtube.com/watch?v=zpbH...
www.youtube.com/watch?v=zpbH...
GSI seminar 10DEC25 1080
YouTube video by James Dyke
www.youtube.com
December 17, 2025 at 3:33 PM
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.
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.
December 17, 2025 at 12:08 PM
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.
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
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
My Top-10 pick of insightful climate papers of 2025
For my last article of 2025, I thought I’d look back over the climate change, paleoclimate, impacts, solutions and science papers that I found most fascinating this year. Here are my Top-10.
drtomharris.substack.com
December 17, 2025 at 9:22 AM
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
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
Reposted by Dr Tom Harris
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...
Read the full article here: time.com/7340848/pari...
December 16, 2025 at 10:19 AM
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...
Read the full article here: time.com/7340848/pari...
Reposted by Dr Tom Harris
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 ⬇️
Animation of OSCAR estimated ocean currents just for fun ⬇️
December 16, 2025 at 12:32 PM
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 ⬇️
Animation of OSCAR estimated ocean currents just for fun ⬇️
Reposted by Dr Tom Harris
Must watch from Yellow Dot!
POV: Big Oil explains the weather they caused.
December 12, 2025 at 10:27 PM
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 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 National Emergency Briefing
The National Emergency Briefing was held on in Westminster Central Hall on the 27th November. Eight leading experts, chaired by Professor Mike Berners-Lee, gave a concise, high-level and unfiltered br...
www.youtube.com
December 12, 2025 at 2:53 PM
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 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.
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.
December 12, 2025 at 2:29 PM
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.
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
drtomharris.substack.com/p/permafrost...
#climatechange #permafrost #cryosphere #melting #emissions #CDR #carbonbudget #tippingpoint #arctic
Permafrost emissions are on track to overtake India’s human emissions
Arctic Amplification, driving temperature increases up to 4x faster than the rest of the world, is melting Permafrost at alarming rates that will soon see it’s emissions eclipse even large countries.
drtomharris.substack.com
December 10, 2025 at 9:44 AM
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
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
www.nature.com/articles/s41...
#climatechange #PETM #Paleoclimate #carboncycle
Loss of vegetation functions during the Paleocene–Eocene Thermal Maximum - Nature Communications
Combining fossil records and vegetation modelling, this study shows that global warming during the Paleocene-Eocene Thermal Maximum 56 million years ago exceeded the adaptation capacity of vegetation,...
www.nature.com
December 7, 2025 at 12:06 PM
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
www.nature.com/articles/s41...
#climatechange #PETM #Paleoclimate #carboncycle
Reposted by Dr Tom Harris
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...
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...
December 5, 2025 at 11:42 AM
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...
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
www.forbes.com/sites/claire...
#climatechange #emergency #crisis
UK Security, Food And Economy At Risk Without Climate Action, Experts Say
Experts at the U.K.’s first national emergency briefing on climate and nature shared risks in a world being rapidly destabilised by climate and biodiversity breakdown
www.forbes.com
December 4, 2025 at 2:41 PM
A good article in Forbes covering the recent National Emergency Briefing in London last week 👇
www.forbes.com/sites/claire...
#climatechange #emergency #crisis
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
drtomharris.substack.com/p/the-el-nin...
#ElNiño #climatechange #ENSO #drought #flood #weather
The El Niño Fast Track: Could a 2026 El Niño deliver another global warming shockwave?
NOAA are predicting the return of El Niño in 2026, the first since 2023. What could this spell for global temperatures and weather extremes?
drtomharris.substack.com
December 3, 2025 at 9:11 AM
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
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
www.youtube.com/watch?v=8sa7...
#climatechange #impacts #energy #health #tippingpoints #nationalsecurity #foodsecurity
This is not the video I had planned to make.
YouTube video by Just Have a Think
www.youtube.com
December 1, 2025 at 4:09 PM
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
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
www.nature.com/articles/s41...
#climatechange #deforestation #Africa
Loss of tropical moist broadleaf forest has turned Africa’s forests from a carbon sink into a source - Scientific Reports
Africa’s forests and woody savannas have historically acted as a carbon sink, removing atmospheric carbon and storing it as biomass. However, our novel analysis reveals a critical transition from a ca...
www.nature.com
November 30, 2025 at 9:12 AM
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
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/...
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/...
Scientists warn of severe climate-related risks to UK economy and security
Experts lay out scale of changes needed in ‘first-of-its-kind national emergency briefing’ in Westminster
www.theguardian.com
November 28, 2025 at 2:11 PM
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/...
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
www.nature.com/articles/s41...
#climatechange #phycology #communication #risk #IPCC #AR7
Negative verbal probabilities undermine communication of climate science - Nature Climate Change
Effective communication of uncertainty is vital for public accurate understanding of climate science. Here the authors find that projections using positive probability terms (for example, a small prob...
www.nature.com
November 27, 2025 at 11:33 AM
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
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
drtomharris.substack.com/p/breathless...
#climatechange #health
Breathless: The Toll of Fossil Fuels and a Changing Planet
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.
drtomharris.substack.com
November 26, 2025 at 9:27 AM
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
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.
Please take the time to absorb the consequences of our inaction.
Your 'moment of doom' for Nov. 24, 2025 ~ There goes the sun.
"Stardust could be capable of significantly altering the climate of the entire world in only a few years — and potentially wreaking unforeseeable environmental and geopolitical turmoil."
www.politico.com/news/magazin...
"Stardust could be capable of significantly altering the climate of the entire world in only a few years — and potentially wreaking unforeseeable environmental and geopolitical turmoil."
www.politico.com/news/magazin...
The Strange and Totally Real Plan to Blot Out the Sun and Reverse Global Warming
A 25-person startup is developing technology to block the sun and turn down the planet’s thermostat. The stakes are huge — and the company and its critics say regulations need to catch up.
www.politico.com
November 24, 2025 at 3:32 PM
This is a long read, but an essential one 👇
Please take the time to absorb the consequences of our inaction.
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
acp.copernicus.org/articles/25/...
#aerosols #climatechange #clouds #IMO2020 #ECS
acp.copernicus.org
November 24, 2025 at 11:55 AM
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
acp.copernicus.org/articles/25/...
#aerosols #climatechange #clouds #IMO2020 #ECS