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.
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
“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
www.theguardian.com/commentisfre...
#climatechange #heatexposure #cold #mortality
There’s a catastrophic black hole in our climate data – and it’s a gift to deniers | George Monbiot
Climate sceptics tell us that more people die of extreme cold than extreme heat. What’s the truth? asks Guardian columnist George Monbiot
www.theguardian.com
November 23, 2025 at 9:46 AM
“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
www.theguardian.com/commentisfre...
#climatechange #heatexposure #cold #mortality
Reposted by Dr Tom Harris
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...
doi.org/10.1038/s415...
Future extreme precipitation amplified by intensified mesoscale moisture convergence - Nature Geoscience
Extreme daily precipitation events over land could increase by about 41% by 2100 under a high-emissions scenario with an increase in mesoscale moisture convergence, according to an ensemble of climate...
doi.org
November 21, 2025 at 10:57 AM
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...
doi.org/10.1038/s415...
Reposted by Dr Tom Harris
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...
theconversation.com/how-china-cl...
How China cleaned up its air pollution – and what that meant for the climate
Atmospheric scientist Laura Wilcox talks to The Conversation Weekly about the measures China took to improve its air pollution – and the unintended consequences for the climate.
theconversation.com
November 21, 2025 at 9:13 AM
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...
theconversation.com/how-china-cl...
Reposted by Dr Tom Harris
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...
Ministers Launch Global South–South Effort to Cut Methane and Nitrous Oxide from Agriculture
Belém, Brazil - 19 November 2025 â Ministers and global agriculture leaders launched a landmark effort to reduce methane and nitrous oxide emissions from farming, two potent greenhouse gases that t...
www.ccacoalition.org
November 20, 2025 at 12:08 PM
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...
Reposted by Dr Tom Harris
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 fast-fix for global warming that the UN climate summit can’t ignore
Removing so-called ‘short-lived climate pollutants’ from the atmosphere could reduce global warming – fast.
theconversation.com
November 19, 2025 at 11:59 AM
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
drtomharris.substack.com/p/amoc-weake...
#climatechange #amoc #adaptation #tippingpoint
AMOC weakening declared a national security threat
Iceland has declared the AMOC a national security threat and an existential risk in the coming decades, enabling its Government to prepare for worst-case scenarios. Should we be worried?
drtomharris.substack.com
November 19, 2025 at 9:14 AM
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
drtomharris.substack.com/p/amoc-weake...
#climatechange #amoc #adaptation #tippingpoint
Reposted by Dr Tom Harris
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...
#ClimateChange #Antarctica #SeaLevelRise
@leonsimons.bsky.social @bikingmzstacey.bsky.social @radsci.bsky.social
youtube.com/live/iarx9Pi...
'Doomsday Glacier' Update with Eric Rignot
YouTube video by Climate Chat
youtube.com
November 14, 2025 at 8:00 AM
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...
#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
www.carbonbrief.org/analysis-fos...
#emissions #carbonbudget #fossilfuels #landusechange
Analysis: Fossil-fuel CO2 emissions to set new record in 2025, as land sink ‘recovers’ - Carbon Brief
Carbon dioxide (CO2) emissions from fossil fuels and cement will rise around 1.1% in 2025,...
www.carbonbrief.org
November 13, 2025 at 11:45 AM
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
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 👇
In this episode, Nate interviews Professor Ted Parson about solar geoengineering (specifically stratospheric aerosol injection) as a potential response to severe climate risks.
www.thegreatsimplification.com/episode/200-...
www.thegreatsimplification.com/episode/200-...
November 12, 2025 at 4:24 PM
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
My summary and thoughts: drtomharris.substack.com/p/we-cannot-...
#climatechange #cryosphere
We cannot negotiate with the melting point of ice.
The 2025 State of the Cryosphere Report reveals accelerating losses of ice sheets, mountain glaciers, sea ice and permafrost. This impacts everyone, but growing damage could still be reduced - barely.
drtomharris.substack.com
November 12, 2025 at 9:24 AM
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
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
#climatechange #netzero #emissions #scenarios
November 8, 2025 at 4:28 PM
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
#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”
The report states that “AMOC shutdown appears all but inevitable”
November 7, 2025 at 9:28 AM
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”
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
www.nature.com/articles/s41...
#climatechange #aerosols #albedo #ECS #acceleration
Reduced aerosol pollution diminished cloud reflectivity over the North Atlantic and Northeast Pacific - Nature Communications
Marine cloud reflectivity declined by 2.8%/decade (2003-2022) over the NE Pacific and North Atlantic, enhancing shortwave absorption beyond climate model projections. Here, the authors use an improved...
www.nature.com
November 5, 2025 at 2:07 PM
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
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...
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...
Will A.I. save us from Climate Change or make it worse?
As we navigate the Third Golden Age of A.I., there is a great deal of both hope and dread about its impact on the climate. Optimisation vs energy demands, efficiency vs emissions. Where will it lead?
drtomharris.substack.com
November 5, 2025 at 9:31 AM
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...
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...
Reposted by Dr Tom Harris
The Global Average Sea Surface Temperature is now very similar to 2015.
See if you can spot some regional differences:
1/2
See if you can spot some regional differences:
1/2
November 4, 2025 at 5:17 PM
The Global Average Sea Surface Temperature is now very similar to 2015.
See if you can spot some regional differences:
1/2
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...
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...
Tree rings from ancient coffins offer clues to Earth’s past
Wood from gravesites can help reconstruct historic temperatures, floods, and droughts
www.science.org
November 4, 2025 at 2:33 PM
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...
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
#antarctica #adventure #expedition #science #climatechange
November 2, 2025 at 10:14 AM
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
#antarctica #adventure #expedition #science #climatechange
Reposted by Dr Tom Harris
"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 "
November 1, 2025 at 12:17 AM
"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
r3genesis.substack.com/p/200-how-re...
#climatechange #naturebasedsolutions #climatesensitivity #weather #aerosols #geoengineering
#200 : How Restoring Nature Lowers Climate Sensitivity
How climate sensitivity drifts with land, clouds, oceans, and ice
r3genesis.substack.com
October 31, 2025 at 11:04 AM
A very good coffee break read on a busy Friday 👇
r3genesis.substack.com/p/200-how-re...
#climatechange #naturebasedsolutions #climatesensitivity #weather #aerosols #geoengineering
r3genesis.substack.com/p/200-how-re...
#climatechange #naturebasedsolutions #climatesensitivity #weather #aerosols #geoengineering
Reposted by Dr Tom Harris
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
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
10 New Insights in Climate Science
Essential research findings to support decision-making in a critical decade.
10insightsclimate.science
October 31, 2025 at 8:52 AM
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
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
I’ve scribbled on his graph below to add a very important line - reality.
#climatechange #acceleration
October 30, 2025 at 9:37 AM
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
I’ve scribbled on his graph below to add a very important line - reality.
#climatechange #acceleration
Reposted by Dr Tom Harris
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...
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...
🤯 1700 mm of rain in 24 hours 🤯
Previous record 990 mm in 24 hours in 1999
Previous record 990 mm in 24 hours in 1999
Vietnam city sets national record with 1.7 m rain in 24 hours
The central Vietnamese city of Hue recorded more than a metre of rain in a 24-hour period, smashing a national record set over two decades ago, the environment ministry said Tuesday.
www.france24.com
October 30, 2025 at 9:20 AM
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...
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...
Reposted by Dr Tom Harris
Rapid warming from rising greenhouse gases + declining aerosol particle pollution are worsening extremes, depleting groundwater & limiting carbon uptake by land - #10ClimateInsights:
10insightsclimate.science
10insightsclimate.science
10 New Insights in Climate Science
Essential research findings to support decision-making in a critical decade.
10insightsclimate.science
October 30, 2025 at 8:12 AM
Rapid warming from rising greenhouse gases + declining aerosol particle pollution are worsening extremes, depleting groundwater & limiting carbon uptake by land - #10ClimateInsights:
10insightsclimate.science
10insightsclimate.science