Ian Hall
@ianhall.bsky.social
Climate scientist, palaeoclimatologist, marine geologist and ageing marathon runner. Prof. @ Cardiff University, views are my own, #FirstGen, He/Him 🏴🇪🇺
Sea level doesn’t rise at the same rate everywhere – we mapped where Antarctica’s ice melt would have the biggest impact
Well worth a read...
theconversation.com/sea-level-do...
Well worth a read...
theconversation.com/sea-level-do...
Sea level doesn’t rise at the same rate everywhere – we mapped where Antarctica’s ice melt would have the biggest impact
Understanding what happens to Antarctica’s ice matters, because as it melts, sea levels rise, affecting lives and economies around the world.
theconversation.com
November 25, 2025 at 3:58 PM
Sea level doesn’t rise at the same rate everywhere – we mapped where Antarctica’s ice melt would have the biggest impact
Well worth a read...
theconversation.com/sea-level-do...
Well worth a read...
theconversation.com/sea-level-do...
Here's what's next in the fight to curb climate change, now that talks in Brazil have ended
www.independent.co.uk/news/amazon-...
www.independent.co.uk/news/amazon-...
Here's what's next in the fight to curb climate change, now that talks in Brazil have ended
Experts have mixed reactions to the recent U.N. climate talks in the Amazon
www.independent.co.uk
November 25, 2025 at 5:57 AM
Here's what's next in the fight to curb climate change, now that talks in Brazil have ended
www.independent.co.uk/news/amazon-...
www.independent.co.uk/news/amazon-...
Zombie fires: how Arctic wildfires that come back to life are ravaging forests
www.theguardian.com/environment/...
www.theguardian.com/environment/...
Zombie fires: how Arctic wildfires that come back to life are ravaging forests
Blazes that smoulder in the permafrost, only to reignite, are extending fire season though winter, leaving vegetation struggling to recover
www.theguardian.com
November 24, 2025 at 12:11 PM
Zombie fires: how Arctic wildfires that come back to life are ravaging forests
www.theguardian.com/environment/...
www.theguardian.com/environment/...
Extreme day-to-day temperature swings are becoming more frequent and intense due to Global warming, impacting human health, ecosystems, and resilience.
By 2100, these changes could increase by 17%, affecting 80% of the global population.
www.nature.com/articles/s41...
By 2100, these changes could increase by 17%, affecting 80% of the global population.
www.nature.com/articles/s41...
Global warming intensifies extreme day-to-day temperature changes in mid–low latitudes - Nature Climate Change
Climate change is expected to lead to higher day-to-day temperature variability in mid- to low latitudes. Here the authors show that extreme day-to-day temperature changes have distinct impacts on hum...
www.nature.com
November 24, 2025 at 5:44 AM
Extreme day-to-day temperature swings are becoming more frequent and intense due to Global warming, impacting human health, ecosystems, and resilience.
By 2100, these changes could increase by 17%, affecting 80% of the global population.
www.nature.com/articles/s41...
By 2100, these changes could increase by 17%, affecting 80% of the global population.
www.nature.com/articles/s41...
Reposted by Ian Hall
We had only recently passed 350 ppm when I started my PhD in Earth System Science, already a value understood to be dangerous and a threat to society.
And now, 33 years and 30 COPs later, we are at a value that is unprecedented for the past 3 million years and maybe even the past 8 million years.
And now, 33 years and 30 COPs later, we are at a value that is unprecedented for the past 3 million years and maybe even the past 8 million years.
425.82 parts per million (ppm) CO2 in air 20-Nov-2025
keelingcurve.ucsd.edu
keelingcurve.ucsd.edu
The Keeling Curve
The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.
keelingcurve.ucsd.edu
November 23, 2025 at 7:54 AM
We had only recently passed 350 ppm when I started my PhD in Earth System Science, already a value understood to be dangerous and a threat to society.
And now, 33 years and 30 COPs later, we are at a value that is unprecedented for the past 3 million years and maybe even the past 8 million years.
And now, 33 years and 30 COPs later, we are at a value that is unprecedented for the past 3 million years and maybe even the past 8 million years.
Satellites, AI, and cash: US pulls back on climate research, private companies swoop in, and climate data becomes a commodity
www.reuters.com/sustainabili...
www.reuters.com/sustainabili...
www.reuters.com
November 23, 2025 at 6:04 AM
Satellites, AI, and cash: US pulls back on climate research, private companies swoop in, and climate data becomes a commodity
www.reuters.com/sustainabili...
www.reuters.com/sustainabili...
Division defines COP30: no fossil-fuel progress, Brazil under fire, the EU outplayed, trade battles brewing, and China emerging on top.
The so called “COP of truth” shows just how fragile climate unity has become…
www.bbc.co.uk/news/article...
The so called “COP of truth” shows just how fragile climate unity has become…
www.bbc.co.uk/news/article...
COP30 - Five key takeaways from a deeply divisive climate summit
What did we learn from a climate summit that ended in a deal with no new mention of fossil fuels?
www.bbc.co.uk
November 23, 2025 at 5:54 AM
Division defines COP30: no fossil-fuel progress, Brazil under fire, the EU outplayed, trade battles brewing, and China emerging on top.
The so called “COP of truth” shows just how fragile climate unity has become…
www.bbc.co.uk/news/article...
The so called “COP of truth” shows just how fragile climate unity has become…
www.bbc.co.uk/news/article...
COP30 showed who’s really steering climate policy: not the EU, not the US — but a coalition of fossil states on one side and a solar-powered China on the other
November 23, 2025 at 5:46 AM
COP30 showed who’s really steering climate policy: not the EU, not the US — but a coalition of fossil states on one side and a solar-powered China on the other
We’re heading into climate overshoot…
1.5 °C will be breached, tipping points loom, and the window for action is closing fast.
But the future isn’t fixed; rapid fossil phase-out, carbon removal, and restoring nature now can still pull us back from the brink.
theconversation.com/the-world-lo...
1.5 °C will be breached, tipping points loom, and the window for action is closing fast.
But the future isn’t fixed; rapid fossil phase-out, carbon removal, and restoring nature now can still pull us back from the brink.
theconversation.com/the-world-lo...
The world lost the climate gamble. Now it faces a dangerous new reality
The world bet on collective but voluntary action to keep global warming at a safe level.
theconversation.com
November 22, 2025 at 12:54 PM
We’re heading into climate overshoot…
1.5 °C will be breached, tipping points loom, and the window for action is closing fast.
But the future isn’t fixed; rapid fossil phase-out, carbon removal, and restoring nature now can still pull us back from the brink.
theconversation.com/the-world-lo...
1.5 °C will be breached, tipping points loom, and the window for action is closing fast.
But the future isn’t fixed; rapid fossil phase-out, carbon removal, and restoring nature now can still pull us back from the brink.
theconversation.com/the-world-lo...
'A lot of fighting': Fossil fuel row breaks out at UN climate summit COP30
www.bbc.co.uk/news/article...
www.bbc.co.uk/news/article...
COP30: UN climate summit drops mention of fossil fuels from draft deal
A row over fossil fuels has broken out at COP30 but this is also likely to be a negotiating tactic.
www.bbc.co.uk
November 21, 2025 at 8:36 PM
'A lot of fighting': Fossil fuel row breaks out at UN climate summit COP30
www.bbc.co.uk/news/article...
www.bbc.co.uk/news/article...
Cop30 delegates ‘far apart’ on phasing out fossil fuels and cutting carbon
www.theguardian.com/environment/...
www.theguardian.com/environment/...
Cop30 delegates ‘far apart’ on phasing out fossil fuels and cutting carbon
President of talks urges ministers and high-ranking officials to find common ground as conference nears its end
www.theguardian.com
November 21, 2025 at 8:33 PM
Cop30 delegates ‘far apart’ on phasing out fossil fuels and cutting carbon
www.theguardian.com/environment/...
www.theguardian.com/environment/...
Another climate conundrum:
Synthetic biology could cut billions of tonnes of CO2, but it also means releasing engineered microbes into the world.
Game-changer or gamble?
How comfortable are you…
theconversation.com/engineered-m...
Synthetic biology could cut billions of tonnes of CO2, but it also means releasing engineered microbes into the world.
Game-changer or gamble?
How comfortable are you…
theconversation.com/engineered-m...
Engineered microbes could tackle climate change – if we ensure it’s done safely
Engineering microbes to soak up more carbon, boost crop yields and restore former farmland is appealing. But synthetic biology fixes must be done thoughtfully
theconversation.com
November 21, 2025 at 7:47 PM
Another climate conundrum:
Synthetic biology could cut billions of tonnes of CO2, but it also means releasing engineered microbes into the world.
Game-changer or gamble?
How comfortable are you…
theconversation.com/engineered-m...
Synthetic biology could cut billions of tonnes of CO2, but it also means releasing engineered microbes into the world.
Game-changer or gamble?
How comfortable are you…
theconversation.com/engineered-m...
🌊 Ocean submesoscales as drivers of submarine melting within Antarctic ice cavities
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Ocean submesoscales as drivers of submarine melting within Antarctic ice cavities - Nature Geoscience
Submesoscale ocean features deliver heat beneath Thwaites Ice Shelf and contribute to submarine melting, according to numerical modelling combined with available observations.
www.nature.com
November 21, 2025 at 7:55 AM
🌊 Ocean submesoscales as drivers of submarine melting within Antarctic ice cavities
www.nature.com/articles/s41...
www.nature.com/articles/s41...
If a 2003-style heatwave hit Europe today, at ~1.5°C warming, it could cause ~18k deaths in a week, rising to ~32k at 3°C.
Even with current adaptation, extreme-heat mass-mortality events remain plausible.
Every 0.1°C of warming matters....
www.nature.com/articles/s41...
Even with current adaptation, extreme-heat mass-mortality events remain plausible.
Every 0.1°C of warming matters....
www.nature.com/articles/s41...
Increasing risk of mass human heat mortality if historical weather patterns recur - Nature Climate Change
The authors couple calculations of historical heatwave intensity at present and future global temperatures with exposure–response functions to quantify mortality from extreme heat events in Europe. Th...
www.nature.com
November 19, 2025 at 7:59 AM
If a 2003-style heatwave hit Europe today, at ~1.5°C warming, it could cause ~18k deaths in a week, rising to ~32k at 3°C.
Even with current adaptation, extreme-heat mass-mortality events remain plausible.
Every 0.1°C of warming matters....
www.nature.com/articles/s41...
Even with current adaptation, extreme-heat mass-mortality events remain plausible.
Every 0.1°C of warming matters....
www.nature.com/articles/s41...
NZ’s earliest climate change debate: the 150-year-old feud over glacial retreat
theconversation.com/nzs-earliest...
theconversation.com/nzs-earliest...
NZ’s earliest climate change debate: the 150-year-old feud over glacial retreat
In the 19th century, scientists could see landscape signs suggesting glaciers were larger in the past, but they settled on tectonic uplift as an explanation.
theconversation.com
November 19, 2025 at 7:51 AM
NZ’s earliest climate change debate: the 150-year-old feud over glacial retreat
theconversation.com/nzs-earliest...
theconversation.com/nzs-earliest...
Agriculture causes up to a third of GHG emissions, yet 300+ ag lobbyists are pushing unproven ‘solutions’ at COP30.
Efficiency alone won’t save us; we need radical food-system change.
www.theguardian.com/environment/...
Efficiency alone won’t save us; we need radical food-system change.
www.theguardian.com/environment/...
More than 300 big agriculture lobbyists took part in Cop30, investigation finds
Lobbyists representing industry responsible for a quarter to a third of global emissions participated in key talks at the UN climate summit
www.theguardian.com
November 18, 2025 at 10:30 AM
Agriculture causes up to a third of GHG emissions, yet 300+ ag lobbyists are pushing unproven ‘solutions’ at COP30.
Efficiency alone won’t save us; we need radical food-system change.
www.theguardian.com/environment/...
Efficiency alone won’t save us; we need radical food-system change.
www.theguardian.com/environment/...
🌊 Southward shift of the Antarctic Circumpolar Current upstream of Drake Passage maintains a stable circumpolar transport
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Southward shift of the Antarctic Circumpolar Current upstream of Drake Passage maintains a stable circumpolar transport - Nature Climate Change
Climate change is altering the strength and position of Southern Ocean westerly winds but the ocean transport is stable. Here the authors use sea surface height to show that a poleward shift of the no...
www.nature.com
November 18, 2025 at 8:16 AM
🌊 Southward shift of the Antarctic Circumpolar Current upstream of Drake Passage maintains a stable circumpolar transport
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Saying it how it is:
‘Damned if we do but completely stuffed if we don’t’: heatwaves will worsen longer net zero is delayed
www.theguardian.com/environment/...
‘Damned if we do but completely stuffed if we don’t’: heatwaves will worsen longer net zero is delayed
www.theguardian.com/environment/...
‘Damned if we do but completely stuffed if we don’t’: heatwaves will worsen longer net zero is delayed
A new study suggests heatwaves will not revert back towards preindustrial conditions for at least 1,000 years after emissions target reached
www.theguardian.com
November 17, 2025 at 10:50 AM
Saying it how it is:
‘Damned if we do but completely stuffed if we don’t’: heatwaves will worsen longer net zero is delayed
www.theguardian.com/environment/...
‘Damned if we do but completely stuffed if we don’t’: heatwaves will worsen longer net zero is delayed
www.theguardian.com/environment/...
Climate crisis or a warning from God? Iranians desperate for answers as water dries up
www.theguardian.com/world/2025/n....
www.theguardian.com/world/2025/n....
Climate crisis or a warning from God? Iranians desperate for answers as water dries up
As rainy season fails to bring relief, authorities try cloud seeding – while others across the country pray for a miracle
www.theguardian.com
November 17, 2025 at 4:34 AM
Climate crisis or a warning from God? Iranians desperate for answers as water dries up
www.theguardian.com/world/2025/n....
www.theguardian.com/world/2025/n....
Early climate models got global warming right – but now US funding cuts threaten the future of climate science data
theconversation.com/early-climat...
theconversation.com/early-climat...
Early climate models got global warming right – but now US funding cuts threaten the future of climate science data
Climate scientist Nadir Jeevanjee speaks on The Conversation Weekly podcast about how the pioneers of climate modelling got many of their predictions right.
theconversation.com
November 15, 2025 at 6:14 PM
Early climate models got global warming right – but now US funding cuts threaten the future of climate science data
theconversation.com/early-climat...
theconversation.com/early-climat...
170,000 reasons a minute: why Saudi Arabia is the biggest blocker of climate action
www.theguardian.com/world/2025/n...
www.theguardian.com/world/2025/n...
$170,000 a minute: why Saudi Arabia is the biggest blocker of climate action
Desert kingdom depends on oil dollars but its people already face a climate ‘at the verge of livability’. What’s going on?
www.theguardian.com
November 15, 2025 at 6:08 PM
170,000 reasons a minute: why Saudi Arabia is the biggest blocker of climate action
www.theguardian.com/world/2025/n...
www.theguardian.com/world/2025/n...