Ian Hall
@ianhall.bsky.social
Climate scientist, palaeoclimatologist, marine geologist and ageing marathon runner. Prof. @ Cardiff University, views are my own, #FirstGen, He/Him 🏴🇪🇺
🌊 The Arctic is losing its ice and gaining too much light.
A new study finds ocean brightness could double by 2100, reshaping marine life, turning it less polar and more Atlantic
www.nature.com/articles/s41...
A new study finds ocean brightness could double by 2100, reshaping marine life, turning it less polar and more Atlantic
www.nature.com/articles/s41...
November 7, 2025 at 6:27 AM
🌊 The Arctic is losing its ice and gaining too much light.
A new study finds ocean brightness could double by 2100, reshaping marine life, turning it less polar and more Atlantic
www.nature.com/articles/s41...
A new study finds ocean brightness could double by 2100, reshaping marine life, turning it less polar and more Atlantic
www.nature.com/articles/s41...
The world is way off track.
The 2025 State of Climate Action report finds that none of the 45 key sectors —from energy to food to transport —are aligned with 1.5 °C.
The reality of inaction has caught up.
systemschangelab.org/sites/defaul...
The 2025 State of Climate Action report finds that none of the 45 key sectors —from energy to food to transport —are aligned with 1.5 °C.
The reality of inaction has caught up.
systemschangelab.org/sites/defaul...
November 1, 2025 at 5:59 PM
The world is way off track.
The 2025 State of Climate Action report finds that none of the 45 key sectors —from energy to food to transport —are aligned with 1.5 °C.
The reality of inaction has caught up.
systemschangelab.org/sites/defaul...
The 2025 State of Climate Action report finds that none of the 45 key sectors —from energy to food to transport —are aligned with 1.5 °C.
The reality of inaction has caught up.
systemschangelab.org/sites/defaul...
Peer-reviewed studies show lifetime emissions from ~70 to 180+ gCO₂/kWh in worst cases, i.e low sunlight, short lifespan,
inefficient tech, high-carbon manufacturing
Modern PV: 20–50 gCO₂/kWh
...but outliers ≠ norm
inefficient tech, high-carbon manufacturing
Modern PV: 20–50 gCO₂/kWh
...but outliers ≠ norm
October 18, 2025 at 7:24 AM
Peer-reviewed studies show lifetime emissions from ~70 to 180+ gCO₂/kWh in worst cases, i.e low sunlight, short lifespan,
inefficient tech, high-carbon manufacturing
Modern PV: 20–50 gCO₂/kWh
...but outliers ≠ norm
inefficient tech, high-carbon manufacturing
Modern PV: 20–50 gCO₂/kWh
...but outliers ≠ norm
It is not my area of direct expertise, but my understanding is that total life cycle GHG emissions from solar PV systems are similar to those of other renewables and nuclear energy, and much lower than those of coal/oil/gas.
October 17, 2025 at 5:26 PM
It is not my area of direct expertise, but my understanding is that total life cycle GHG emissions from solar PV systems are similar to those of other renewables and nuclear energy, and much lower than those of coal/oil/gas.
Really enjoyed speaking with the #NERC GW4+ DTLP PGR cohort today about EDI in research and beyond. Such thoughtful discussion and genuine curiosity — exciting to see the next generation of researchers starting to think about inclusive leadership for the future
October 3, 2025 at 1:41 PM
Really enjoyed speaking with the #NERC GW4+ DTLP PGR cohort today about EDI in research and beyond. Such thoughtful discussion and genuine curiosity — exciting to see the next generation of researchers starting to think about inclusive leadership for the future
I’m on vacation walking in the Dolomites.
Today I hiked near the Marmolada glacier - what was once a vast mass of ice is now streaked with bare rock and thinning fast.
Just looked it up: the glacier has retreated ~7 m in the past year alone
Climate change in action…
www.unipd.it/news/campagn...
Today I hiked near the Marmolada glacier - what was once a vast mass of ice is now streaked with bare rock and thinning fast.
Just looked it up: the glacier has retreated ~7 m in the past year alone
Climate change in action…
www.unipd.it/news/campagn...
September 21, 2025 at 5:10 PM
I’m on vacation walking in the Dolomites.
Today I hiked near the Marmolada glacier - what was once a vast mass of ice is now streaked with bare rock and thinning fast.
Just looked it up: the glacier has retreated ~7 m in the past year alone
Climate change in action…
www.unipd.it/news/campagn...
Today I hiked near the Marmolada glacier - what was once a vast mass of ice is now streaked with bare rock and thinning fast.
Just looked it up: the glacier has retreated ~7 m in the past year alone
Climate change in action…
www.unipd.it/news/campagn...
🌊 Plastics aren’t just polluting the ocean, they might be messing with the marine carbon cycle too.
A new study argues plastics could disrupt how the ocean captures and stores CO₂.
A hidden climate risk? 👇
www.nature.com/articles/s41...
A new study argues plastics could disrupt how the ocean captures and stores CO₂.
A hidden climate risk? 👇
www.nature.com/articles/s41...
September 18, 2025 at 3:34 PM
🌊 Plastics aren’t just polluting the ocean, they might be messing with the marine carbon cycle too.
A new study argues plastics could disrupt how the ocean captures and stores CO₂.
A hidden climate risk? 👇
www.nature.com/articles/s41...
A new study argues plastics could disrupt how the ocean captures and stores CO₂.
A hidden climate risk? 👇
www.nature.com/articles/s41...
How does summer 2025 compare to summer 1976
Summer 2025 was the UK’s hottest ever, not just brief heatwaves, but relentless warmth day and night
What was once a 1-in-340-year event now happens every 5 years
www.metoffice.gov.uk/blog/2025/ho...
Summer 2025 was the UK’s hottest ever, not just brief heatwaves, but relentless warmth day and night
What was once a 1-in-340-year event now happens every 5 years
www.metoffice.gov.uk/blog/2025/ho...
September 7, 2025 at 4:27 PM
How does summer 2025 compare to summer 1976
Summer 2025 was the UK’s hottest ever, not just brief heatwaves, but relentless warmth day and night
What was once a 1-in-340-year event now happens every 5 years
www.metoffice.gov.uk/blog/2025/ho...
Summer 2025 was the UK’s hottest ever, not just brief heatwaves, but relentless warmth day and night
What was once a 1-in-340-year event now happens every 5 years
www.metoffice.gov.uk/blog/2025/ho...
September 5, 2025 at 9:29 AM
September 5, 2025 at 6:23 AM
I have a feeling reality is about to hit…#ICP15 😬
Biomineralisation in foraminifera: how do they do it and does it affect application of proxies?
By Leenart de Nooijer
Biomineralisation in foraminifera: how do they do it and does it affect application of proxies?
By Leenart de Nooijer
September 5, 2025 at 5:41 AM
I have a feeling reality is about to hit…#ICP15 😬
Biomineralisation in foraminifera: how do they do it and does it affect application of proxies?
By Leenart de Nooijer
Biomineralisation in foraminifera: how do they do it and does it affect application of proxies?
By Leenart de Nooijer
Today is the final day of #ICP15, but the science content continues…
We begin with a talk by Yi Wang on Tracking Global Oxygen with Thallium Isotopes
We begin with a talk by Yi Wang on Tracking Global Oxygen with Thallium Isotopes
September 5, 2025 at 4:08 AM
Today is the final day of #ICP15, but the science content continues…
We begin with a talk by Yi Wang on Tracking Global Oxygen with Thallium Isotopes
We begin with a talk by Yi Wang on Tracking Global Oxygen with Thallium Isotopes
Great to get an update at #ICP15 on recent advances in U-Th chronology and geochemical proxies for reconstructing Asian monsoon variability from Speleothems by Chuan-Chou (River) Shen
September 4, 2025 at 6:36 AM
Great to get an update at #ICP15 on recent advances in U-Th chronology and geochemical proxies for reconstructing Asian monsoon variability from Speleothems by Chuan-Chou (River) Shen
Plio-Pleistocene history of the North American Monsoon at #ICP15
…or “the weird cousin of the Indian monsoon system” by Tripti Bhattacharya
…or “the weird cousin of the Indian monsoon system” by Tripti Bhattacharya
September 4, 2025 at 6:11 AM
Plio-Pleistocene history of the North American Monsoon at #ICP15
…or “the weird cousin of the Indian monsoon system” by Tripti Bhattacharya
…or “the weird cousin of the Indian monsoon system” by Tripti Bhattacharya
A key skill at #ICP15 is the ability to switch between different timescales
Its onto the long-term evolution of the south Asian Monsson over the past 20 million years, by Anta-Clarisse Sarr
Its onto the long-term evolution of the south Asian Monsson over the past 20 million years, by Anta-Clarisse Sarr
September 4, 2025 at 4:46 AM
A key skill at #ICP15 is the ability to switch between different timescales
Its onto the long-term evolution of the south Asian Monsson over the past 20 million years, by Anta-Clarisse Sarr
Its onto the long-term evolution of the south Asian Monsson over the past 20 million years, by Anta-Clarisse Sarr
September 4, 2025 at 4:30 AM
Outcome is that CMIP models underestimate future drought risk…
September 4, 2025 at 4:28 AM
Outcome is that CMIP models underestimate future drought risk…
Global response to cooling in the North Atlantic
September 4, 2025 at 4:26 AM
Global response to cooling in the North Atlantic
Cooling of the tropical Atlantic explains the global response
September 4, 2025 at 4:20 AM
Cooling of the tropical Atlantic explains the global response
Having experienced a bit of the intensity of the Indian Monsoon this week at #ICP15, it’s good to start day 4 with an update on its evolution and spatio-temporal variability from A.D. Singh
September 4, 2025 at 3:44 AM
Having experienced a bit of the intensity of the Indian Monsoon this week at #ICP15, it’s good to start day 4 with an update on its evolution and spatio-temporal variability from A.D. Singh