Annika Högner
@hoegner.bsky.social
🌱🌏 Researcher at @iiasa.ac.at 🌞🌱
Reposted by Annika Högner
Spiralling global temperatures (1850-2025)
The last 3 years really jump out, rather like 2015-6 did when we first produced this graphic back then. Now, 2015-6 looks rather cool...
More on the spiral: doi.org/10.1175/BAMS...
The last 3 years really jump out, rather like 2015-6 did when we first produced this graphic back then. Now, 2015-6 looks rather cool...
More on the spiral: doi.org/10.1175/BAMS...
January 14, 2026 at 11:37 AM
Spiralling global temperatures (1850-2025)
The last 3 years really jump out, rather like 2015-6 did when we first produced this graphic back then. Now, 2015-6 looks rather cool...
More on the spiral: doi.org/10.1175/BAMS...
The last 3 years really jump out, rather like 2015-6 did when we first produced this graphic back then. Now, 2015-6 looks rather cool...
More on the spiral: doi.org/10.1175/BAMS...
Submissions for abstracts to EGU26 are open until next week.
@imenke.bsky.social , @etheokritoff.bsky.social , Noah Walker-Crawford, @rosapietroiusti.bsky.social , and I are looking forward to your contributions to our climate science and litigation-themed outreach session.
@imenke.bsky.social , @etheokritoff.bsky.social , Noah Walker-Crawford, @rosapietroiusti.bsky.social , and I are looking forward to your contributions to our climate science and litigation-themed outreach session.
⚖️ Are you working on topics that could be relevant for climate litigation?
➡️ Submit an abstract to our outreach session (which allows you to submit a second abstract)
#EGU26
meetingorganizer.copernicus.org/EGU26/sessio...
➡️ Submit an abstract to our outreach session (which allows you to submit a second abstract)
#EGU26
meetingorganizer.copernicus.org/EGU26/sessio...
January 8, 2026 at 5:45 PM
Submissions for abstracts to EGU26 are open until next week.
@imenke.bsky.social , @etheokritoff.bsky.social , Noah Walker-Crawford, @rosapietroiusti.bsky.social , and I are looking forward to your contributions to our climate science and litigation-themed outreach session.
@imenke.bsky.social , @etheokritoff.bsky.social , Noah Walker-Crawford, @rosapietroiusti.bsky.social , and I are looking forward to your contributions to our climate science and litigation-themed outreach session.
Reposted by Annika Högner
The ESM forcing files for #CMIP7 #ScenarioMIP are now up on the Earth System Grid for the two advanced-priority scenarios High (H) and Very Low (VL). CMIP7 H is significantly lower emissions than CMIP6's SSP585 - and VL has more radical near-term decarbonisation than anything we had in CMIP6.
January 8, 2026 at 11:05 AM
The ESM forcing files for #CMIP7 #ScenarioMIP are now up on the Earth System Grid for the two advanced-priority scenarios High (H) and Very Low (VL). CMIP7 H is significantly lower emissions than CMIP6's SSP585 - and VL has more radical near-term decarbonisation than anything we had in CMIP6.
Reposted by Annika Högner
CO2 Newsletter Vol. 1 no. 1 (Oct 1979) is live!
Between 1979 and 1982 American geologist William N. Barbat published 18 issues. Each was 8 pages of news (scientific abstracts, testimony, science and policy reports) editorials, investigations etc.
1/2
allouryesterdays.info/2026/01/05/c...
Between 1979 and 1982 American geologist William N. Barbat published 18 issues. Each was 8 pages of news (scientific abstracts, testimony, science and policy reports) editorials, investigations etc.
1/2
allouryesterdays.info/2026/01/05/c...
January 5, 2026 at 3:09 PM
CO2 Newsletter Vol. 1 no. 1 (Oct 1979) is live!
Between 1979 and 1982 American geologist William N. Barbat published 18 issues. Each was 8 pages of news (scientific abstracts, testimony, science and policy reports) editorials, investigations etc.
1/2
allouryesterdays.info/2026/01/05/c...
Between 1979 and 1982 American geologist William N. Barbat published 18 issues. Each was 8 pages of news (scientific abstracts, testimony, science and policy reports) editorials, investigations etc.
1/2
allouryesterdays.info/2026/01/05/c...
Reposted by Annika Högner
And Christmas came early: Asmania et al took an important hurdle in their lawsuit against carbon major Holcim, which was today admitted to proceed to trial. Noone is above the law!
⚡ ⚖️ 🌍 𝐈𝐦𝐩𝐨𝐫𝐭𝐚𝐧𝐭 #𝐂𝐥𝐢𝐦𝐚𝐭𝐞𝐋𝐢𝐭𝐢𝐠𝐚𝐭𝐢𝐨𝐧 𝐩𝐫𝐨𝐜𝐞𝐝𝐮𝐫𝐚𝐥 𝐰𝐢𝐧 in🇨🇭Swiss case vs. carbon major.
Judges validated legal theories underpinning the case brought by 4 Indonesian islanders against Holcim and accepted all claims as admissible, clearing path to judgment on the merits.
🧵details in thread below 👇
Judges validated legal theories underpinning the case brought by 4 Indonesian islanders against Holcim and accepted all claims as admissible, clearing path to judgment on the merits.
🧵details in thread below 👇
December 22, 2025 at 4:20 PM
And Christmas came early: Asmania et al took an important hurdle in their lawsuit against carbon major Holcim, which was today admitted to proceed to trial. Noone is above the law!
Reposted by Annika Högner
“Playing the market”, but for real.
After becoming a congressional leader, a politician’s stock portfolio beats out those of peers by 47 (!!!) percentage points a year through trades timed around bills and firms that later get government contracts
www.nber.org/papers/w34524
via @florianederer.bsky.social
www.nber.org/papers/w34524
via @florianederer.bsky.social
December 3, 2025 at 11:21 AM
“Playing the market”, but for real.
Reposted by Annika Högner
⚖️ Are you working on topics that could be relevant for climate litigation?
➡️ Submit an abstract to our outreach session (which allows you to submit a second abstract)
#EGU26
meetingorganizer.copernicus.org/EGU26/sessio...
➡️ Submit an abstract to our outreach session (which allows you to submit a second abstract)
#EGU26
meetingorganizer.copernicus.org/EGU26/sessio...
November 7, 2025 at 9:22 AM
⚖️ Are you working on topics that could be relevant for climate litigation?
➡️ Submit an abstract to our outreach session (which allows you to submit a second abstract)
#EGU26
meetingorganizer.copernicus.org/EGU26/sessio...
➡️ Submit an abstract to our outreach session (which allows you to submit a second abstract)
#EGU26
meetingorganizer.copernicus.org/EGU26/sessio...
Reposted by Annika Högner
目标类型及描述。争取到 2035 年温室气体排放水平稳
中有降，比 2030 年下降 5%以上。
"Target type and description: Strive to achieve a stable to slightly reduced level of greenhouse gas emissions by 2035, with a decrease of more than 5% compared to 2030."
(Google Translated.)
中有降，比 2030 年下降 5%以上。
"Target type and description: Strive to achieve a stable to slightly reduced level of greenhouse gas emissions by 2035, with a decrease of more than 5% compared to 2030."
(Google Translated.)
November 3, 2025 at 11:57 AM
目标类型及描述。争取到 2035 年温室气体排放水平稳
中有降，比 2030 年下降 5%以上。
"Target type and description: Strive to achieve a stable to slightly reduced level of greenhouse gas emissions by 2035, with a decrease of more than 5% compared to 2030."
(Google Translated.)
中有降，比 2030 年下降 5%以上。
"Target type and description: Strive to achieve a stable to slightly reduced level of greenhouse gas emissions by 2035, with a decrease of more than 5% compared to 2030."
(Google Translated.)
Reposted by Annika Högner
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
Reposted by Annika Högner
This is how climate injustice unfolds. There is both an economic logic to cutting emissions now & a moral imperative to rapidly scale up international finance for loss and damage and adaptation in the most vulnerable countries.
⚠️Climate change made Hurricane Melissa four times more likely, rapid study estimates
The most powerful storm in Jamaica’s history shows how climate change is increasing the economic cost, intensity, and likelihood of major storms 🧵
ow.ly/Kazp50Xke8N
The most powerful storm in Jamaica’s history shows how climate change is increasing the economic cost, intensity, and likelihood of major storms 🧵
ow.ly/Kazp50Xke8N
October 30, 2025 at 10:44 AM
This is how climate injustice unfolds. There is both an economic logic to cutting emissions now & a moral imperative to rapidly scale up international finance for loss and damage and adaptation in the most vulnerable countries.
Reposted by Annika Högner
🚨 BREAKING: The European Court of Human Rights @ECHR_CEDH has ruled in @GreenpeaceNorge and Others v. Norway.
The decision is an important step for #ClimateJustice.
Here’s why it matters 🧵
The decision is an important step for #ClimateJustice.
Here’s why it matters 🧵
October 28, 2025 at 4:10 PM
🚨 BREAKING: The European Court of Human Rights @ECHR_CEDH has ruled in @GreenpeaceNorge and Others v. Norway.
The decision is an important step for #ClimateJustice.
Here’s why it matters 🧵
The decision is an important step for #ClimateJustice.
Here’s why it matters 🧵
Reposted by Annika Högner
Our new brief “Pre-COP30: how are temperatures tracking on the latest targets?” is here: www.climate-resource.com/reports/ndcs...
#ClimateAction #COP30 #ClimateFinance
#ClimateAction #COP30 #ClimateFinance
www.climate-resource.com
October 28, 2025 at 12:49 AM
Our new brief “Pre-COP30: how are temperatures tracking on the latest targets?” is here: www.climate-resource.com/reports/ndcs...
#ClimateAction #COP30 #ClimateFinance
#ClimateAction #COP30 #ClimateFinance
Reposted by Annika Högner
Really important paper led by my @iiasa.ac.at colleague Alex Nauels www.nature.com/articles/s41...
“The difference between decisive climate action today and continued high emissions is not just measured in degrees of warming but also in meters of sea-level rise” 👏👏👏
“The difference between decisive climate action today and continued high emissions is not just measured in degrees of warming but also in meters of sea-level rise” 👏👏👏
Multi-century global and regional sea-level rise commitments from cumulative greenhouse gas emissions in the coming decades - Nature Climate Change
It is important to understand how much long-term sea-level rise is already committed due to historical and near-term emissions. Here the authors use a modelling framework to show how decisions on glob...
www.nature.com
October 24, 2025 at 10:40 AM
Really important paper led by my @iiasa.ac.at colleague Alex Nauels www.nature.com/articles/s41...
“The difference between decisive climate action today and continued high emissions is not just measured in degrees of warming but also in meters of sea-level rise” 👏👏👏
“The difference between decisive climate action today and continued high emissions is not just measured in degrees of warming but also in meters of sea-level rise” 👏👏👏
Reposted by Annika Högner
Merz & Co wollen die EU-Klimaziele aufweichen?! Nicht mit uns 😡 In einem offenen Brief mit Wissenschaftler*innen fordern wir die Bundesregierung jetzt auf, sich für ein starkes Ziel von mind. 90% Reduktion bis 2040 einzusetzen & nicht noch zu verzögern!
👉 fridaysforfuture.de/offener-brie...
👉 fridaysforfuture.de/offener-brie...
October 20, 2025 at 11:56 AM
Merz & Co wollen die EU-Klimaziele aufweichen?! Nicht mit uns 😡 In einem offenen Brief mit Wissenschaftler*innen fordern wir die Bundesregierung jetzt auf, sich für ein starkes Ziel von mind. 90% Reduktion bis 2040 einzusetzen & nicht noch zu verzögern!
👉 fridaysforfuture.de/offener-brie...
👉 fridaysforfuture.de/offener-brie...
Reposted by Annika Högner
A request for weather interested volunteers!
Met Eireann would like to rescue millions of weather observations taken in Ireland over many decades that are still stuck on paper. #WeatherRescue
Anyone can help: www.zooniverse.org/projects/met...
Met Eireann would like to rescue millions of weather observations taken in Ireland over many decades that are still stuck on paper. #WeatherRescue
Anyone can help: www.zooniverse.org/projects/met...
October 16, 2025 at 7:25 AM
A request for weather interested volunteers!
Met Eireann would like to rescue millions of weather observations taken in Ireland over many decades that are still stuck on paper. #WeatherRescue
Anyone can help: www.zooniverse.org/projects/met...
Met Eireann would like to rescue millions of weather observations taken in Ireland over many decades that are still stuck on paper. #WeatherRescue
Anyone can help: www.zooniverse.org/projects/met...
Reposted by Annika Högner
This is a good corrective to the BS narrative flowing through the Pielke/AEI/NYP/EID/DOE nexus. Their argument is designed so that we can never ever attribute extreme events to emissions - even singular events that would have *never* [for some suitable finite approximation] have happened before.
Today from @lesleyclark.bsky.social and @saraschonhardt.bsky.social + contribs from me:
www.eenews.net/articles/cli...
www.eenews.net/articles/cli...
Climate critics try to discredit IPCC author for linking disasters to global warming
Roger Pielke Jr. and oil industry supporters are attacking climate scientist Friederike Otto, whose work has been used in lawsuits against polluters.
www.eenews.net
October 9, 2025 at 8:57 PM
This is a good corrective to the BS narrative flowing through the Pielke/AEI/NYP/EID/DOE nexus. Their argument is designed so that we can never ever attribute extreme events to emissions - even singular events that would have *never* [for some suitable finite approximation] have happened before.
Reposted by Annika Högner
Super comprehensive report on our @iiasa.ac.at overshoot conference by @carbonbrief.org. Great summary and overview on some of the central discussion points. Check it out👇👇👇
www.carbonbrief.org/overshoot-ex...
www.carbonbrief.org/overshoot-ex...
Overshoot: Exploring the implications of meeting 1.5C climate goal ‘from above’ - Carbon Brief
The first-ever international conference on the contentious topic of “overshoot” was held last week in...
www.carbonbrief.org
October 8, 2025 at 1:16 PM
Super comprehensive report on our @iiasa.ac.at overshoot conference by @carbonbrief.org. Great summary and overview on some of the central discussion points. Check it out👇👇👇
www.carbonbrief.org/overshoot-ex...
www.carbonbrief.org/overshoot-ex...
Reposted by Annika Högner
🚨NEW PAPER🚨
We all know the 2022 energy price shock fueled the cost of living crisis. It also caused a profit bonanza for the very rich. We show the US reaped the largest profits ($377bn) of any country. 50% went to the richest 1%, only 1% to the bottom 50%. A🧵 www.sciencedirect.com/science/arti...
We all know the 2022 energy price shock fueled the cost of living crisis. It also caused a profit bonanza for the very rich. We show the US reaped the largest profits ($377bn) of any country. 50% went to the richest 1%, only 1% to the bottom 50%. A🧵 www.sciencedirect.com/science/arti...
October 8, 2025 at 4:50 PM
🚨NEW PAPER🚨
We all know the 2022 energy price shock fueled the cost of living crisis. It also caused a profit bonanza for the very rich. We show the US reaped the largest profits ($377bn) of any country. 50% went to the richest 1%, only 1% to the bottom 50%. A🧵 www.sciencedirect.com/science/arti...
We all know the 2022 energy price shock fueled the cost of living crisis. It also caused a profit bonanza for the very rich. We show the US reaped the largest profits ($377bn) of any country. 50% went to the richest 1%, only 1% to the bottom 50%. A🧵 www.sciencedirect.com/science/arti...
Reposted by Annika Högner
In the lead up to the Overshoot Conference @iiasa.ac.at Sep 30-Oct 2, the organizers had a fantastic nerdy idea to get the leading experts in their fields share their perspectives on the key themes. Highly recommend for your daily commute, background to cooking etc.: open.spotify.com/show/5MpXqh1...
Episode 2: Highest Possible Ambition under Overshoot with Joeri Rogelj
open.spotify.com
September 9, 2025 at 12:05 PM
In the lead up to the Overshoot Conference @iiasa.ac.at Sep 30-Oct 2, the organizers had a fantastic nerdy idea to get the leading experts in their fields share their perspectives on the key themes. Highly recommend for your daily commute, background to cooking etc.: open.spotify.com/show/5MpXqh1...
Reposted by Annika Högner
⚡ ⚖️ 🌐 upcoming #𝐂𝐥𝐢𝐦𝐚𝐭𝐞𝐋𝐢𝐭𝐢𝐠𝐚𝐭𝐢𝐨𝐧: Asmania v. Holcim
Crucial hearing upcoming in Switzerland, this could set a precedent for holding climate polluters accountable.
📅 Wed, 3 Sept 2025 – starting at 8:30 am CEST
📍 Cantonal Parliament of Zug🇨🇭
👇 A brief thread🧵
Crucial hearing upcoming in Switzerland, this could set a precedent for holding climate polluters accountable.
📅 Wed, 3 Sept 2025 – starting at 8:30 am CEST
📍 Cantonal Parliament of Zug🇨🇭
👇 A brief thread🧵
September 2, 2025 at 12:52 PM
⚡ ⚖️ 🌐 upcoming #𝐂𝐥𝐢𝐦𝐚𝐭𝐞𝐋𝐢𝐭𝐢𝐠𝐚𝐭𝐢𝐨𝐧: Asmania v. Holcim
Crucial hearing upcoming in Switzerland, this could set a precedent for holding climate polluters accountable.
📅 Wed, 3 Sept 2025 – starting at 8:30 am CEST
📍 Cantonal Parliament of Zug🇨🇭
👇 A brief thread🧵
Crucial hearing upcoming in Switzerland, this could set a precedent for holding climate polluters accountable.
📅 Wed, 3 Sept 2025 – starting at 8:30 am CEST
📍 Cantonal Parliament of Zug🇨🇭
👇 A brief thread🧵
Reposted by Annika Högner
🔥 Just published! 🔥
Our new manuscript on global #wildfires look beyond burned areas and ask:
What drives the #economic damages of wildfires — now & in the future?
We find that socioeconomic vulnerability, not just #climate, is key.
📄 iopscience.iop.org/article/10.1...
(Highlights below ⬇️)
Our new manuscript on global #wildfires look beyond burned areas and ask:
What drives the #economic damages of wildfires — now & in the future?
We find that socioeconomic vulnerability, not just #climate, is key.
📄 iopscience.iop.org/article/10.1...
(Highlights below ⬇️)
July 25, 2025 at 10:23 AM
🔥 Just published! 🔥
Our new manuscript on global #wildfires look beyond burned areas and ask:
What drives the #economic damages of wildfires — now & in the future?
We find that socioeconomic vulnerability, not just #climate, is key.
📄 iopscience.iop.org/article/10.1...
(Highlights below ⬇️)
Our new manuscript on global #wildfires look beyond burned areas and ask:
What drives the #economic damages of wildfires — now & in the future?
We find that socioeconomic vulnerability, not just #climate, is key.
📄 iopscience.iop.org/article/10.1...
(Highlights below ⬇️)
Reposted by Annika Högner
*** Faktencheck***
In der Generaldebatte im Bundestag sprach Bundeskanzler Friedrich #Merz auch zum Klimaschutz. Er sagte:
"Selbst wenn wir alle morgen klimaneutral wären, würde keine einzige Naturkatastrophe weniger geschehen". Ein Faktencheck.
1/
In der Generaldebatte im Bundestag sprach Bundeskanzler Friedrich #Merz auch zum Klimaschutz. Er sagte:
"Selbst wenn wir alle morgen klimaneutral wären, würde keine einzige Naturkatastrophe weniger geschehen". Ein Faktencheck.
1/
Was Merz heute zum Klimaschutz sagte, schießt den Vogel ab.
Deutschland rangiert historisch unter den größten CO2-Emittenten weltweit - auf Platz 3.
Wenn ausgerechnet der Kanzler eines der reichsten Länder der Welt sagt, das sollen mal andere machen, dann bedeutet das: Der Klimaschutz ist am Ende.
Deutschland rangiert historisch unter den größten CO2-Emittenten weltweit - auf Platz 3.
Wenn ausgerechnet der Kanzler eines der reichsten Länder der Welt sagt, das sollen mal andere machen, dann bedeutet das: Der Klimaschutz ist am Ende.
July 11, 2025 at 5:11 AM
*** Faktencheck***
In der Generaldebatte im Bundestag sprach Bundeskanzler Friedrich #Merz auch zum Klimaschutz. Er sagte:
"Selbst wenn wir alle morgen klimaneutral wären, würde keine einzige Naturkatastrophe weniger geschehen". Ein Faktencheck.
1/
In der Generaldebatte im Bundestag sprach Bundeskanzler Friedrich #Merz auch zum Klimaschutz. Er sagte:
"Selbst wenn wir alle morgen klimaneutral wären, würde keine einzige Naturkatastrophe weniger geschehen". Ein Faktencheck.
1/
New study out, in which we detect a causal link in reanalysis+observational data from an AMOC SST index to the Southern Amazon rainforest: dry season precipitation increases when the AMOC weakens.
doi.org/10.1088/1748...
doi.org/10.1088/1748...
Causal pathway from AMOC to Southern Amazon rainforest indicates stabilising interaction between two climate tipping elements - IOPscience
Causal pathway from AMOC to Southern Amazon rainforest indicates stabilising interaction between two climate tipping elements, Högner, Annika, Di Capua, Giorgia, Donges, Jonathan F, Donner, Reik V, Feulner, Georg, Wunderling, Nico
doi.org
June 10, 2025 at 8:36 AM
New study out, in which we detect a causal link in reanalysis+observational data from an AMOC SST index to the Southern Amazon rainforest: dry season precipitation increases when the AMOC weakens.
doi.org/10.1088/1748...
doi.org/10.1088/1748...
Reposted by Annika Högner
🌎 New research led by IIASA researcher @hoegner.bsky.social shows a link between two major climate tipping elements: the Southern Amazon rainforest and the Atlantic Meridional Overturning Circulation (AMOC).
👉 iiasa.ac.at/news/jun-202...
@pik-potsdam.bsky.social @ioppublishing.bsky.social
👉 iiasa.ac.at/news/jun-202...
@pik-potsdam.bsky.social @ioppublishing.bsky.social
June 9, 2025 at 9:04 AM
🌎 New research led by IIASA researcher @hoegner.bsky.social shows a link between two major climate tipping elements: the Southern Amazon rainforest and the Atlantic Meridional Overturning Circulation (AMOC).
👉 iiasa.ac.at/news/jun-202...
@pik-potsdam.bsky.social @ioppublishing.bsky.social
👉 iiasa.ac.at/news/jun-202...
@pik-potsdam.bsky.social @ioppublishing.bsky.social