Dr. Aaron Thierry
@thierryaaron.bsky.social
Graduate student at Cardiff University - researching the role of science and scientists in the climate movement. PhD in Ecology. Activism. Climate communications.
“What happened here is crazy,” said Cristina Santin, a biologist from northwestern Spain who studies fire impacts. “Suddenly you get up one day and your home region is burning on a scale that is completely unprecedented.”
#Spain 🇪🇸
#ClimateEmergency
www.reuters.com/investigates...
#Spain 🇪🇸
#ClimateEmergency
www.reuters.com/investigates...
November 15, 2025 at 5:25 PM
“What happened here is crazy,” said Cristina Santin, a biologist from northwestern Spain who studies fire impacts. “Suddenly you get up one day and your home region is burning on a scale that is completely unprecedented.”
#Spain 🇪🇸
#ClimateEmergency
www.reuters.com/investigates...
#Spain 🇪🇸
#ClimateEmergency
www.reuters.com/investigates...
"It's clear that the EU is committed to at least a generous 1.6 degrees with its emissions targets, and perhaps even slightly more than 1.8 degrees, depending on the pathway it uses to achieve these goals. None of these pathways are aligned with the 1.5-degree target."
November 14, 2025 at 12:29 PM
"It's clear that the EU is committed to at least a generous 1.6 degrees with its emissions targets, and perhaps even slightly more than 1.8 degrees, depending on the pathway it uses to achieve these goals. None of these pathways are aligned with the 1.5-degree target."
"what extreme flooding would look like in #Vancouver by 2100 if no action were
#ClimateEmergency
Source:
earth.org/data_visuali...
#ClimateEmergency
Source:
earth.org/data_visuali...
November 12, 2025 at 1:55 AM
"what extreme flooding would look like in #Vancouver by 2100 if no action were
#ClimateEmergency
Source:
earth.org/data_visuali...
#ClimateEmergency
Source:
earth.org/data_visuali...
8/ A @wwattribution.bsky.social concluded that the 2024 heat wave in Mexico was made many times more likely by #climate change from fossil fuel burning
www.worldweatherattribution.org/extreme-heat...
www.worldweatherattribution.org/extreme-heat...
November 9, 2025 at 3:05 AM
8/ A @wwattribution.bsky.social concluded that the 2024 heat wave in Mexico was made many times more likely by #climate change from fossil fuel burning
www.worldweatherattribution.org/extreme-heat...
www.worldweatherattribution.org/extreme-heat...
6/ In 2019 Chennai, India 🇮🇳 home to 10 million people faced crisis as its reservoirs ran dry
www.theguardian.com/world/2019/j...
www.theguardian.com/world/2019/j...
November 9, 2025 at 3:05 AM
6/ In 2019 Chennai, India 🇮🇳 home to 10 million people faced crisis as its reservoirs ran dry
www.theguardian.com/world/2019/j...
www.theguardian.com/world/2019/j...
5/ A subsequent study of this the Cape Town drought concluded that " #climate change made this event five to six times more likely relative to the early 20th century"
A risk that continues to grow.
www.pnas.org/doi/10.1073/...
A risk that continues to grow.
www.pnas.org/doi/10.1073/...
November 9, 2025 at 3:05 AM
5/ A subsequent study of this the Cape Town drought concluded that " #climate change made this event five to six times more likely relative to the early 20th century"
A risk that continues to grow.
www.pnas.org/doi/10.1073/...
A risk that continues to grow.
www.pnas.org/doi/10.1073/...
In 2020 @wwf.panda.org identified the 100 global cities expected to suffer the greatest rise in water risk by 2050- home to at least 350 million people!
We've already seen several megacities just days away from running dry.
Here's a🧵 with eg's
We've already seen several megacities just days away from running dry.
Here's a🧵 with eg's
November 9, 2025 at 3:05 AM
In 2020 @wwf.panda.org identified the 100 global cities expected to suffer the greatest rise in water risk by 2050- home to at least 350 million people!
We've already seen several megacities just days away from running dry.
Here's a🧵 with eg's
We've already seen several megacities just days away from running dry.
Here's a🧵 with eg's
1m -
Now long-term inevitable (by
mid-2100s), but potentially by
2070 with current emissions
3m-
Likely inevitable in 1000–2000 yrs;
BUT by early 2100’s with current
emissions
10m-
By 2300 with current
emissions
#COP30 #Belém
Source:
iccinet.org/statecryo25/
Now long-term inevitable (by
mid-2100s), but potentially by
2070 with current emissions
3m-
Likely inevitable in 1000–2000 yrs;
BUT by early 2100’s with current
emissions
10m-
By 2300 with current
emissions
#COP30 #Belém
Source:
iccinet.org/statecryo25/
November 9, 2025 at 1:02 AM
1m -
Now long-term inevitable (by
mid-2100s), but potentially by
2070 with current emissions
3m-
Likely inevitable in 1000–2000 yrs;
BUT by early 2100’s with current
emissions
10m-
By 2300 with current
emissions
#COP30 #Belém
Source:
iccinet.org/statecryo25/
Now long-term inevitable (by
mid-2100s), but potentially by
2070 with current emissions
3m-
Likely inevitable in 1000–2000 yrs;
BUT by early 2100’s with current
emissions
10m-
By 2300 with current
emissions
#COP30 #Belém
Source:
iccinet.org/statecryo25/
State of the Cryosphere Report 2025
"Recent evidence suggests the AMOC is weakening more quickly than previously thought, raising serious concerns about an irreversible threshold being crossed..." - @iccinet.bsky.social
iccinet.org/statecryo25/
"Recent evidence suggests the AMOC is weakening more quickly than previously thought, raising serious concerns about an irreversible threshold being crossed..." - @iccinet.bsky.social
iccinet.org/statecryo25/
November 8, 2025 at 7:24 AM
State of the Cryosphere Report 2025
"Recent evidence suggests the AMOC is weakening more quickly than previously thought, raising serious concerns about an irreversible threshold being crossed..." - @iccinet.bsky.social
iccinet.org/statecryo25/
"Recent evidence suggests the AMOC is weakening more quickly than previously thought, raising serious concerns about an irreversible threshold being crossed..." - @iccinet.bsky.social
iccinet.org/statecryo25/
"we investigate how often five basic #climate facts are conveyed in @nytimes.com news articles covering climate change from 1980 to 2018. With only one exception, the frequencies with which these facts appear in news articles today are vanishingly small"
iopscience.iop.org/article/10.1...
iopscience.iop.org/article/10.1...
November 8, 2025 at 5:07 AM
"we investigate how often five basic #climate facts are conveyed in @nytimes.com news articles covering climate change from 1980 to 2018. With only one exception, the frequencies with which these facts appear in news articles today are vanishingly small"
iopscience.iop.org/article/10.1...
iopscience.iop.org/article/10.1...
"...extremely hot days & years are becoming more common & widespread & that the annual precipitation totals are becoming more extreme over high-latitude regions. There are also dry regions that have experienced more extreme conditions in terms of lack of rainfall..."
www.science.org/doi/10.1126/...
www.science.org/doi/10.1126/...
November 7, 2025 at 5:43 AM
"...extremely hot days & years are becoming more common & widespread & that the annual precipitation totals are becoming more extreme over high-latitude regions. There are also dry regions that have experienced more extreme conditions in terms of lack of rainfall..."
www.science.org/doi/10.1126/...
www.science.org/doi/10.1126/...
"Climate Action: Tackling the #Climate Crisis for a Better World" is an excellent 4 week free online course from @universityofleeds.bsky.social
Follow this link to take part.
www.futurelearn.com/courses/clim...
Follow this link to take part.
www.futurelearn.com/courses/clim...
November 6, 2025 at 4:58 AM
"Climate Action: Tackling the #Climate Crisis for a Better World" is an excellent 4 week free online course from @universityofleeds.bsky.social
Follow this link to take part.
www.futurelearn.com/courses/clim...
Follow this link to take part.
www.futurelearn.com/courses/clim...
No worries, also remembered this one.
Wiedmann, T., Lenzen, M., Keyßer, L.T. et al. (2020) "Scientists’ warning on affluence", Nature Communications, 11, 3107.
www.nature.com/articles/s41...
Wiedmann, T., Lenzen, M., Keyßer, L.T. et al. (2020) "Scientists’ warning on affluence", Nature Communications, 11, 3107.
www.nature.com/articles/s41...
November 6, 2025 at 12:59 AM
No worries, also remembered this one.
Wiedmann, T., Lenzen, M., Keyßer, L.T. et al. (2020) "Scientists’ warning on affluence", Nature Communications, 11, 3107.
www.nature.com/articles/s41...
Wiedmann, T., Lenzen, M., Keyßer, L.T. et al. (2020) "Scientists’ warning on affluence", Nature Communications, 11, 3107.
www.nature.com/articles/s41...
In 2013 Prof. Stocker, then co-chair of @ipcc.bsky.social WG1, warned in @science.org of the rapidly closing door of our #climate targets
If mitigation is delayed targets become unachievable, as necessary rates of emissions cuts become impossible
1.5C is now unachievable, 2C will soon be too!
If mitigation is delayed targets become unachievable, as necessary rates of emissions cuts become impossible
1.5C is now unachievable, 2C will soon be too!
November 5, 2025 at 6:09 AM
In 2013 Prof. Stocker, then co-chair of @ipcc.bsky.social WG1, warned in @science.org of the rapidly closing door of our #climate targets
If mitigation is delayed targets become unachievable, as necessary rates of emissions cuts become impossible
1.5C is now unachievable, 2C will soon be too!
If mitigation is delayed targets become unachievable, as necessary rates of emissions cuts become impossible
1.5C is now unachievable, 2C will soon be too!
This is a tidy summary. The savings rapidly pay back the cost of the investment...
www.carbonbrief.org/ccc-reducing...
www.carbonbrief.org/ccc-reducing...
November 4, 2025 at 12:21 PM
This is a tidy summary. The savings rapidly pay back the cost of the investment...
www.carbonbrief.org/ccc-reducing...
www.carbonbrief.org/ccc-reducing...
Yet more report whiplash, as groups vie to frame the #climate discourse ahead of #COP30.
"progress... has largely failed to materialize"
"Renewables are expanding faster than any previous energy technology"
"No major economy is on track"
"emerging markets have made major strides"
"progress... has largely failed to materialize"
"Renewables are expanding faster than any previous energy technology"
"No major economy is on track"
"emerging markets have made major strides"
November 4, 2025 at 3:51 AM
Thanks for your replies. I agree, doomism gets us nowhere.
There is some evidence of relative decoupling, but none of absolute decoupling on the scale that is needed.
I found this paper by Vogel and Hickel (2023) very thought-provoking.
www.thelancet.com/journals/lan...
There is some evidence of relative decoupling, but none of absolute decoupling on the scale that is needed.
I found this paper by Vogel and Hickel (2023) very thought-provoking.
www.thelancet.com/journals/lan...
November 4, 2025 at 12:40 AM
Thanks for your replies. I agree, doomism gets us nowhere.
There is some evidence of relative decoupling, but none of absolute decoupling on the scale that is needed.
I found this paper by Vogel and Hickel (2023) very thought-provoking.
www.thelancet.com/journals/lan...
There is some evidence of relative decoupling, but none of absolute decoupling on the scale that is needed.
I found this paper by Vogel and Hickel (2023) very thought-provoking.
www.thelancet.com/journals/lan...
The abolitionist Thomas Clarkson campaigned for almost 50 years of his life before the Slavery Abolition Act of 1833 was passed.
There were many defeats along the way, but he kept the faith.
His history of the struggle, published in 1839 is full of inspiration...
www.gutenberg.org/ebooks/10633
There were many defeats along the way, but he kept the faith.
His history of the struggle, published in 1839 is full of inspiration...
www.gutenberg.org/ebooks/10633
November 3, 2025 at 1:20 PM
The abolitionist Thomas Clarkson campaigned for almost 50 years of his life before the Slavery Abolition Act of 1833 was passed.
There were many defeats along the way, but he kept the faith.
His history of the struggle, published in 1839 is full of inspiration...
www.gutenberg.org/ebooks/10633
There were many defeats along the way, but he kept the faith.
His history of the struggle, published in 1839 is full of inspiration...
www.gutenberg.org/ebooks/10633
"One may insist that green growth hasn’t occurred because it has not been tried, the fact that it hasn’t been empirically observed till now then becoming irrelevant. We follow instead a more precautionary approach & argue that policy should be made on the basis of robust empirical evidence..."
November 3, 2025 at 5:16 AM
"One may insist that green growth hasn’t occurred because it has not been tried, the fact that it hasn’t been empirically observed till now then becoming irrelevant. We follow instead a more precautionary approach & argue that policy should be made on the basis of robust empirical evidence..."
Hickel. J. & Kallis G. (2020) "Is Green Growth Possible?", New Political Economy, Vol 25:4.
www.tandfonline.com/doi/full/10....
www.tandfonline.com/doi/full/10....
November 3, 2025 at 4:53 AM
Hickel. J. & Kallis G. (2020) "Is Green Growth Possible?", New Political Economy, Vol 25:4.
www.tandfonline.com/doi/full/10....
www.tandfonline.com/doi/full/10....
I've finally got around to curating a selection of films about the #climate crisis 🎥
There's lot of mediocre climate films out there, but for me these stand out head & shoulders above the rest 🎞️
They make excellent resources for classrooms, lecture halls, or community cinema's 🎬
Thread:🧵Plz RT
There's lot of mediocre climate films out there, but for me these stand out head & shoulders above the rest 🎞️
They make excellent resources for classrooms, lecture halls, or community cinema's 🎬
Thread:🧵Plz RT
November 1, 2025 at 10:17 AM
I've finally got around to curating a selection of films about the #climate crisis 🎥
There's lot of mediocre climate films out there, but for me these stand out head & shoulders above the rest 🎞️
They make excellent resources for classrooms, lecture halls, or community cinema's 🎬
Thread:🧵Plz RT
There's lot of mediocre climate films out there, but for me these stand out head & shoulders above the rest 🎞️
They make excellent resources for classrooms, lecture halls, or community cinema's 🎬
Thread:🧵Plz RT
Great to see 'Activating Academia for an Era of Colliding Crises' is now available as a FREE eBook📖
Thanks again to Dr. Alison Green, @swaziadam.bsky.social and @jamesgdyke.info for expertly shepherding this collection into this fantastic volume
Available here:
www.frontiersin.org/research-top...
Thanks again to Dr. Alison Green, @swaziadam.bsky.social and @jamesgdyke.info for expertly shepherding this collection into this fantastic volume
Available here:
www.frontiersin.org/research-top...
October 31, 2025 at 10:59 AM
Great to see 'Activating Academia for an Era of Colliding Crises' is now available as a FREE eBook📖
Thanks again to Dr. Alison Green, @swaziadam.bsky.social and @jamesgdyke.info for expertly shepherding this collection into this fantastic volume
Available here:
www.frontiersin.org/research-top...
Thanks again to Dr. Alison Green, @swaziadam.bsky.social and @jamesgdyke.info for expertly shepherding this collection into this fantastic volume
Available here:
www.frontiersin.org/research-top...
"One billion people living in coastal areas will be impacted by the end of the century"
#ClimateEmergency
wmo.int/media/magazi...
#ClimateEmergency
wmo.int/media/magazi...
October 31, 2025 at 2:53 AM
"One billion people living in coastal areas will be impacted by the end of the century"
#ClimateEmergency
wmo.int/media/magazi...
#ClimateEmergency
wmo.int/media/magazi...
I disagree with the line you are taking here. There are in fact many very eminent scientists who are saying that we are on a course towards collapse
Rather than dismiss them out of hand Gates, indeed all of us, should listen and reflect on their arguments.
H/t video @mediatellthetruth.bsky.social
Rather than dismiss them out of hand Gates, indeed all of us, should listen and reflect on their arguments.
H/t video @mediatellthetruth.bsky.social
October 30, 2025 at 11:28 AM
I disagree with the line you are taking here. There are in fact many very eminent scientists who are saying that we are on a course towards collapse
Rather than dismiss them out of hand Gates, indeed all of us, should listen and reflect on their arguments.
H/t video @mediatellthetruth.bsky.social
Rather than dismiss them out of hand Gates, indeed all of us, should listen and reflect on their arguments.
H/t video @mediatellthetruth.bsky.social