Joeri Rogelj
@joerirogelj.bsky.social
prof. climate science & policy | father | Imperial College London | 1.5C/net zero/carbon budget/pathways/justice | IPCC & UNEP lead author | ESABCC member
Reposted by Joeri Rogelj
⚠️Current pledges and policies to reduce greenhouse gas emissions put the world on a high-risk climate track, towards warming levels of 2.8°C by the end of this century warn @joerirogelj.bsky.social, @robinlamboll.bsky.social & @j-bird.bsky.social.
📒 ow.ly/cpTr50Xq1X1
#COP30
📒 ow.ly/cpTr50Xq1X1
#COP30
November 11, 2025 at 5:03 PM
⚠️Current pledges and policies to reduce greenhouse gas emissions put the world on a high-risk climate track, towards warming levels of 2.8°C by the end of this century warn @joerirogelj.bsky.social, @robinlamboll.bsky.social & @j-bird.bsky.social.
📒 ow.ly/cpTr50Xq1X1
#COP30
📒 ow.ly/cpTr50Xq1X1
#COP30
Reposted by Joeri Rogelj
In 2009, the Maldives’ underwater cabinet meeting showed the world the reality of rising seas. 🌊
As Professor @joerirogelj.bsky.social notes, it helped put the 1.5°C target “front and centre.”
16 years on, its message is more urgent than ever.
As Professor @joerirogelj.bsky.social notes, it helped put the 1.5°C target “front and centre.”
16 years on, its message is more urgent than ever.
'This is going to be much bigger than we thought': The legacy of a famous underwater photoshoot
The photo shaped the world's perception of the existential threat climate change poses to low-lying island nations.
www.bbc.co.uk
November 14, 2025 at 4:15 PM
In 2009, the Maldives’ underwater cabinet meeting showed the world the reality of rising seas. 🌊
As Professor @joerirogelj.bsky.social notes, it helped put the 1.5°C target “front and centre.”
16 years on, its message is more urgent than ever.
As Professor @joerirogelj.bsky.social notes, it helped put the 1.5°C target “front and centre.”
16 years on, its message is more urgent than ever.
Reposted by Joeri Rogelj
COP30: Study reveals “highest possible ambition” for countries' climate pledges
With COP30 kicking off on Monday, a new paper by Julia Schönfeld and Professor Joeri Rogelj provides a framework for assessing countries’ climate pledges 🧵
Learn more: ow.ly/CiB050XnMK2
With COP30 kicking off on Monday, a new paper by Julia Schönfeld and Professor Joeri Rogelj provides a framework for assessing countries’ climate pledges 🧵
Learn more: ow.ly/CiB050XnMK2
COP30: Study reveals “highest possible ambition” for countries' climate pledges | Imperial News | Imperial College London
A new study, for the first time, shows how the ‘highest possible ambition’ of countries' climate pledges can be assessed.
ow.ly
November 6, 2025 at 2:07 PM
COP30: Study reveals “highest possible ambition” for countries' climate pledges
With COP30 kicking off on Monday, a new paper by Julia Schönfeld and Professor Joeri Rogelj provides a framework for assessing countries’ climate pledges 🧵
Learn more: ow.ly/CiB050XnMK2
With COP30 kicking off on Monday, a new paper by Julia Schönfeld and Professor Joeri Rogelj provides a framework for assessing countries’ climate pledges 🧵
Learn more: ow.ly/CiB050XnMK2
Stories abound these days showing that global warming exceeding 1.5C is now part of science's best estimate.
What does that mean for the #ParisAgreement 1.5C goal?
A good time to revive a thread about a piece we wrote earlier this year on this topic in @science.org 👇🌍🌡️
What does that mean for the #ParisAgreement 1.5C goal?
A good time to revive a thread about a piece we wrote earlier this year on this topic in @science.org 👇🌍🌡️
What becomes of the 1.5°C goal now that global warming is approaching that level?🌍🔥🌡️
In a new @science.org Policy Forum we explain how the 1.5°C goal remains a critical legal & ethical benchmark, even as the world nears and may soon exceed 1.5°C of global warming🧵1/
www.science.org/doi/10.1126/...
In a new @science.org Policy Forum we explain how the 1.5°C goal remains a critical legal & ethical benchmark, even as the world nears and may soon exceed 1.5°C of global warming🧵1/
www.science.org/doi/10.1126/...
The pursuit of 1.5°C endures as a legal and ethical imperative in a changing world
As the world nears 1.5°C of global warming, near-term emissions reductions and adequate adaptation become ever more important to ensure a safe and livable planet for present and future generations
www.science.org
November 6, 2025 at 5:49 PM
Stories abound these days showing that global warming exceeding 1.5C is now part of science's best estimate.
What does that mean for the #ParisAgreement 1.5C goal?
A good time to revive a thread about a piece we wrote earlier this year on this topic in @science.org 👇🌍🌡️
What does that mean for the #ParisAgreement 1.5C goal?
A good time to revive a thread about a piece we wrote earlier this year on this topic in @science.org 👇🌍🌡️
Two years ago, the @esabcc.bsky.social published its advice on the EU's 2040 emissions reduction target. We indicated a 90-95% reduction relative 1990 levels.
Today, EU climate ministers agreed on a 90% target, with an 66.25-72.5% reduction as part for its new NDC for 2035.
Today, EU climate ministers agreed on a 90% target, with an 66.25-72.5% reduction as part for its new NDC for 2035.
Today, EU climate ministers agreed on a 90% net reduction in GHG emissions by 2040. The Council also updated the NDC with an indicative 66.25–72.5% reduction by 2035 The @esabcc.bsky.social contributed to this process by providing independent scientific advice on the 2040 climate target.
November 5, 2025 at 8:48 PM
Two years ago, the @esabcc.bsky.social published its advice on the EU's 2040 emissions reduction target. We indicated a 90-95% reduction relative 1990 levels.
Today, EU climate ministers agreed on a 90% target, with an 66.25-72.5% reduction as part for its new NDC for 2035.
Today, EU climate ministers agreed on a 90% target, with an 66.25-72.5% reduction as part for its new NDC for 2035.
Today is the official launch of this year's @unep.org #EmissionsGap report.
It's title says it all
OFF TARGET
that's true for progress, NDCs and implementation
It's title says it all
OFF TARGET
that's true for progress, NDCs and implementation
New national climate plans have barely moved the needle on limiting global warming. Yet there is hope.
According to UNEP's latest #EmissionsGap Report, accelerated adoption of renewable energy and falling costs mean we have the tools to cut emissions now: www.unep.org/news-and-sto...
According to UNEP's latest #EmissionsGap Report, accelerated adoption of renewable energy and falling costs mean we have the tools to cut emissions now: www.unep.org/news-and-sto...
November 4, 2025 at 10:04 PM
Today is the official launch of this year's @unep.org #EmissionsGap report.
It's title says it all
OFF TARGET
that's true for progress, NDCs and implementation
It's title says it all
OFF TARGET
that's true for progress, NDCs and implementation
What is the current state of climate action? What do latest country pledges add up to?
And how much global warming are we in for? 🌍🌡️ 🔥
For the 16th year in a row, we publish the @unep.org #emissionsgap report.
As usual, I looked the assessment of the global gap and its global warming implications.
And how much global warming are we in for? 🌍🌡️ 🔥
For the 16th year in a row, we publish the @unep.org #emissionsgap report.
As usual, I looked the assessment of the global gap and its global warming implications.
NEW: The latest climate pledges under the Paris Agreement have driven only a slight fall in predicted global temperature rise over the course of this century.
The UN Emissions Gap Report finds that implementing current policies would lead to up to 2.8°C of warming, down from 3.1°C. 🧵
The UN Emissions Gap Report finds that implementing current policies would lead to up to 2.8°C of warming, down from 3.1°C. 🧵
November 4, 2025 at 4:17 PM
What is the current state of climate action? What do latest country pledges add up to?
And how much global warming are we in for? 🌍🌡️ 🔥
For the 16th year in a row, we publish the @unep.org #emissionsgap report.
As usual, I looked the assessment of the global gap and its global warming implications.
And how much global warming are we in for? 🌍🌡️ 🔥
For the 16th year in a row, we publish the @unep.org #emissionsgap report.
As usual, I looked the assessment of the global gap and its global warming implications.
Reposted by Joeri Rogelj
Grantham Institute Director of Research Professor @joerirogelj.bsky.social was lead author on Chapter 4 of the report, which also includes contributions from Imperial’s Dr @robinlamboll.bsky.social.
Read the report in full here: ow.ly/V7Zy50XmtCz
Read the report in full here: ow.ly/V7Zy50XmtCz
November 4, 2025 at 3:01 PM
Grantham Institute Director of Research Professor @joerirogelj.bsky.social was lead author on Chapter 4 of the report, which also includes contributions from Imperial’s Dr @robinlamboll.bsky.social.
Read the report in full here: ow.ly/V7Zy50XmtCz
Read the report in full here: ow.ly/V7Zy50XmtCz
Reposted by Joeri Rogelj
OUT NOW: we revisit the pivotal moment when science, institutions and politics aligned to deliver the UK’s #NetZero target. At a time of political divergence, the evidence for #ClimateAction remains clear. Evidence-based #ClimatePolicy is more relevant than ever. @granthamicl.bsky.social
Net Zero: The inside story of the UK’s climate target
YouTube video by Grantham Imperial
www.youtube.com
October 13, 2025 at 12:57 PM
OUT NOW: we revisit the pivotal moment when science, institutions and politics aligned to deliver the UK’s #NetZero target. At a time of political divergence, the evidence for #ClimateAction remains clear. Evidence-based #ClimatePolicy is more relevant than ever. @granthamicl.bsky.social
OUT NOW: we revisit the pivotal moment when science, institutions and politics aligned to deliver the UK’s #NetZero target. At a time of political divergence, the evidence for #ClimateAction remains clear. Evidence-based #ClimatePolicy is more relevant than ever. @granthamicl.bsky.social
Net Zero: The inside story of the UK’s climate target
YouTube video by Grantham Imperial
www.youtube.com
October 13, 2025 at 12:57 PM
OUT NOW: we revisit the pivotal moment when science, institutions and politics aligned to deliver the UK’s #NetZero target. At a time of political divergence, the evidence for #ClimateAction remains clear. Evidence-based #ClimatePolicy is more relevant than ever. @granthamicl.bsky.social
Next week, we reflect on how science and society shaped the UK’s #NetZero target. As political consensus wavers, the scientific evidence underpinning the need for rapid #ClimateAction remains robust and unequivocal. 1/2
October 9, 2025 at 2:01 PM
Next week, we reflect on how science and society shaped the UK’s #NetZero target. As political consensus wavers, the scientific evidence underpinning the need for rapid #ClimateAction remains robust and unequivocal. 1/2
Reposted by Joeri Rogelj
COMING SOON…
In 2019, the UK made history as the first major economy to commit to net zero by 2050.
But, while the science hasn’t changed, political consensus is fracturing.
We can’t wait to share our new film & to tell the inside story of the UK’s climate target
Stay tuned…
👀13 October
In 2019, the UK made history as the first major economy to commit to net zero by 2050.
But, while the science hasn’t changed, political consensus is fracturing.
We can’t wait to share our new film & to tell the inside story of the UK’s climate target
Stay tuned…
👀13 October
October 9, 2025 at 11:56 AM
COMING SOON…
In 2019, the UK made history as the first major economy to commit to net zero by 2050.
But, while the science hasn’t changed, political consensus is fracturing.
We can’t wait to share our new film & to tell the inside story of the UK’s climate target
Stay tuned…
👀13 October
In 2019, the UK made history as the first major economy to commit to net zero by 2050.
But, while the science hasn’t changed, political consensus is fracturing.
We can’t wait to share our new film & to tell the inside story of the UK’s climate target
Stay tuned…
👀13 October
Pope Leo XIV has reaffirmed the imperative to act upon climate change and environmental degradation.
This firm response to climate science deniers marks the 10th anniversary of his Predecessor Pope Francis' encyclical "On Care of Our Common Home".
www.bbc.com/news/article...
This firm response to climate science deniers marks the 10th anniversary of his Predecessor Pope Francis' encyclical "On Care of Our Common Home".
www.bbc.com/news/article...
Pope Leo hits out at critics of global warming
In his first major statement on climate change, the pontiff criticises those who minimise climate change.
www.bbc.com
October 2, 2025 at 12:49 PM
Pope Leo XIV has reaffirmed the imperative to act upon climate change and environmental degradation.
This firm response to climate science deniers marks the 10th anniversary of his Predecessor Pope Francis' encyclical "On Care of Our Common Home".
www.bbc.com/news/article...
This firm response to climate science deniers marks the 10th anniversary of his Predecessor Pope Francis' encyclical "On Care of Our Common Home".
www.bbc.com/news/article...
Reposted by Joeri Rogelj
The third and final day of the #OvershootConference kicked off with an insightful report-back and reflection session, where theme leads shared insights from their discussions so far.
See insights from discussions on Day 2 in the thread below:
See insights from discussions on Day 2 in the thread below:
October 2, 2025 at 11:25 AM
The third and final day of the #OvershootConference kicked off with an insightful report-back and reflection session, where theme leads shared insights from their discussions so far.
See insights from discussions on Day 2 in the thread below:
See insights from discussions on Day 2 in the thread below:
Reposted by Joeri Rogelj
🌍New #ERL focus collection on #climate #overshoot is open!
Linked to @iiasa.ac.at Overshoots conference in Vienna this week. ERL Publisher Lauren Carter will be attending, email to discuss a contribution: Lauren.Carter@ioppublishing.org
📅Deadline: 30 April 2026
🔗 iopscience.iop.org/collections/...
Linked to @iiasa.ac.at Overshoots conference in Vienna this week. ERL Publisher Lauren Carter will be attending, email to discuss a contribution: Lauren.Carter@ioppublishing.org
📅Deadline: 30 April 2026
🔗 iopscience.iop.org/collections/...
September 29, 2025 at 1:32 PM
🌍New #ERL focus collection on #climate #overshoot is open!
Linked to @iiasa.ac.at Overshoots conference in Vienna this week. ERL Publisher Lauren Carter will be attending, email to discuss a contribution: Lauren.Carter@ioppublishing.org
📅Deadline: 30 April 2026
🔗 iopscience.iop.org/collections/...
Linked to @iiasa.ac.at Overshoots conference in Vienna this week. ERL Publisher Lauren Carter will be attending, email to discuss a contribution: Lauren.Carter@ioppublishing.org
📅Deadline: 30 April 2026
🔗 iopscience.iop.org/collections/...
Reposted by Joeri Rogelj
@joerirogelj.bsky.social: “The pursuit of 1.5°C endures as a legal and ethical imperative. Overshoot does not erase this goal - it makes it more urgent.”
He called overshoot a test of our generation’s responsibility.
#ScienceInAction #ParisAgreement
He called overshoot a test of our generation’s responsibility.
#ScienceInAction #ParisAgreement
September 15, 2025 at 9:33 AM
@joerirogelj.bsky.social: “The pursuit of 1.5°C endures as a legal and ethical imperative. Overshoot does not erase this goal - it makes it more urgent.”
He called overshoot a test of our generation’s responsibility.
#ScienceInAction #ParisAgreement
He called overshoot a test of our generation’s responsibility.
#ScienceInAction #ParisAgreement
Reposted by Joeri Rogelj
Despite the centrality of equity in the Paris Agreement, no framework exists to allocate responsibilities for carbon dioxide removals among countries.
A new paper, co-authored by Imperial's Professor @joerirogelj.bsky.social, presents a framework for allocating CDR globally 🧵
A new paper, co-authored by Imperial's Professor @joerirogelj.bsky.social, presents a framework for allocating CDR globally 🧵
September 11, 2025 at 3:48 PM
Despite the centrality of equity in the Paris Agreement, no framework exists to allocate responsibilities for carbon dioxide removals among countries.
A new paper, co-authored by Imperial's Professor @joerirogelj.bsky.social, presents a framework for allocating CDR globally 🧵
A new paper, co-authored by Imperial's Professor @joerirogelj.bsky.social, presents a framework for allocating CDR globally 🧵
Reposted by Joeri Rogelj
NEW – Guest post: How the role of carbon storage has been hugely overestimated | @gidden.bsky.social @joerirogelj.bsky.social
Read here: buff.ly/QY7LyJ8
Read here: buff.ly/QY7LyJ8
Guest post: How the role of carbon storage has been hugely overestimated - Carbon Brief
Removing carbon dioxide (CO2) from the atmosphere is widely expected to play a key role in meeting the goals of the Paris Agreement.
buff.ly
September 8, 2025 at 2:46 PM
NEW – Guest post: How the role of carbon storage has been hugely overestimated | @gidden.bsky.social @joerirogelj.bsky.social
Read here: buff.ly/QY7LyJ8
Read here: buff.ly/QY7LyJ8
In a new study, we estimate how much geological CO2 storage capacity would be available when considering social, environmental, seismic and other risks.
Lead author @gidden.bsky.social wrote an extensive 🧵on the work 👇
Lead author @gidden.bsky.social wrote an extensive 🧵on the work 👇
Our paper is out today in @nature.com where we assess a Prudent Planetary Limit for Geologic Carbon Storage:
www.nature.com/articles/s41...
www.nature.com/articles/s41...
A prudent planetary limit for geologic carbon storage - Nature
A risk-based, spatially explicit analysis of carbon storage in sedimentary basins establishes a prudent planetary limit of around 1,460 Gt of geological carbon storage, which requires making explicit ...
www.nature.com
September 4, 2025 at 9:19 AM
In a new study, we estimate how much geological CO2 storage capacity would be available when considering social, environmental, seismic and other risks.
Lead author @gidden.bsky.social wrote an extensive 🧵on the work 👇
Lead author @gidden.bsky.social wrote an extensive 🧵on the work 👇
Reposted by Joeri Rogelj
Coauthor @joerirogelj.bsky.social Rogelj, Director of Research at the Grantham Institute says:
“This study should be a gamechanger for carbon storage. It can no longer be considered an unlimited solution to bring our climate back to a safe level.
“This study should be a gamechanger for carbon storage. It can no longer be considered an unlimited solution to bring our climate back to a safe level.
September 3, 2025 at 3:34 PM
Coauthor @joerirogelj.bsky.social Rogelj, Director of Research at the Grantham Institute says:
“This study should be a gamechanger for carbon storage. It can no longer be considered an unlimited solution to bring our climate back to a safe level.
“This study should be a gamechanger for carbon storage. It can no longer be considered an unlimited solution to bring our climate back to a safe level.
NEW STUDY: How much CO2 can we safely store in geological formations?
In a new @nature.com study, we cross-check established academic and industry estimates with various risk factors.
We find a prudent geological CO2 storage limit that is about 10x smaller. /1
In a new @nature.com study, we cross-check established academic and industry estimates with various risk factors.
We find a prudent geological CO2 storage limit that is about 10x smaller. /1
September 3, 2025 at 3:39 PM
NEW STUDY: How much CO2 can we safely store in geological formations?
In a new @nature.com study, we cross-check established academic and industry estimates with various risk factors.
We find a prudent geological CO2 storage limit that is about 10x smaller. /1
In a new @nature.com study, we cross-check established academic and industry estimates with various risk factors.
We find a prudent geological CO2 storage limit that is about 10x smaller. /1
Announcement:
Climate Science and Policy Event on 9 September 2025 by @iiasa.ac.at at the @royalsociety.org
Register if you're interested in attending in person. 👇
Climate Science and Policy Event on 9 September 2025 by @iiasa.ac.at at the @royalsociety.org
Register if you're interested in attending in person. 👇
🔍Session spotlight: Planetary Crisis and Overshoot Management at @royalsociety.org 📆 9 Sep, with @ukri.org 📲register here: iiasa.ac.at/events/sep-2...
August 28, 2025 at 12:51 PM
Announcement:
Climate Science and Policy Event on 9 September 2025 by @iiasa.ac.at at the @royalsociety.org
Register if you're interested in attending in person. 👇
Climate Science and Policy Event on 9 September 2025 by @iiasa.ac.at at the @royalsociety.org
Register if you're interested in attending in person. 👇
Reposted by Joeri Rogelj
⚖️Climate litigation is entering a new era 🌏
Thanks to attribution science, courts now have the tools to link climate impacts, such as floods, wildfires and extreme heat to major polluters — and assign legal responsibility. 🧵
📒 imperial.ac.uk/stories/polluters-on-trial
Thanks to attribution science, courts now have the tools to link climate impacts, such as floods, wildfires and extreme heat to major polluters — and assign legal responsibility. 🧵
📒 imperial.ac.uk/stories/polluters-on-trial
July 23, 2025 at 9:41 AM
⚖️Climate litigation is entering a new era 🌏
Thanks to attribution science, courts now have the tools to link climate impacts, such as floods, wildfires and extreme heat to major polluters — and assign legal responsibility. 🧵
📒 imperial.ac.uk/stories/polluters-on-trial
Thanks to attribution science, courts now have the tools to link climate impacts, such as floods, wildfires and extreme heat to major polluters — and assign legal responsibility. 🧵
📒 imperial.ac.uk/stories/polluters-on-trial
New research on limits to CO2 removal (CDR). CDR is key to our ambition to stop adding climate pollution to the atmosphere. Because it's uncertain how much will be delivered and it clearly comes with risks of social & environmental side-effects, legal issues arise. This paper provides an overview. 👇
🚨 Out now in @climate-policy.bsky.social: New research with @thomwetzer.bsky.social @rubenpruetz.bsky.social @joerirogelj.bsky.social Lavanya Rajamani, Marianne Wood and Ewan White: States are depending heavily on CO2 removal to meet climate targets, risking the Paris Agreement goal.
July 14, 2025 at 9:54 AM
New research on limits to CO2 removal (CDR). CDR is key to our ambition to stop adding climate pollution to the atmosphere. Because it's uncertain how much will be delivered and it clearly comes with risks of social & environmental side-effects, legal issues arise. This paper provides an overview. 👇
Reposted by Joeri Rogelj
⛈️ @frediotto.bsky.social reviewed extreme weather, such as the LA wildfires, to show that climate change is outpacing adaptation efforts.
🎯 @joerirogelj.bsky.social warns that passing the 1.5°C goal only intensifies the legal & ethical obligations of the Paris Agreement.
buff.ly/dIdDn5a
🎯 @joerirogelj.bsky.social warns that passing the 1.5°C goal only intensifies the legal & ethical obligations of the Paris Agreement.
buff.ly/dIdDn5a
July 9, 2025 at 2:12 PM
⛈️ @frediotto.bsky.social reviewed extreme weather, such as the LA wildfires, to show that climate change is outpacing adaptation efforts.
🎯 @joerirogelj.bsky.social warns that passing the 1.5°C goal only intensifies the legal & ethical obligations of the Paris Agreement.
buff.ly/dIdDn5a
🎯 @joerirogelj.bsky.social warns that passing the 1.5°C goal only intensifies the legal & ethical obligations of the Paris Agreement.
buff.ly/dIdDn5a