Berkeley Earth
@berkeleyearth.org
We're an independent 501c3 non-profit organization working to make climate data open and accessible.
📍Berkeley, CA
＠ www.berkeleyearth.org
💲donate.berkeleyearth.org
📍Berkeley, CA
＠ www.berkeleyearth.org
💲donate.berkeleyearth.org
Pinned
This #GivingTuesday, we’re reflecting on a year of change and what comes next.
In 2026, Berkeley Earth will launch Synthesis, our most significant update yet—built to deliver clear, local, decision-ready climate intelligence.
💙 Support our work: donate.berkeleyearth.org?mc_cid=58fa7...
In 2026, Berkeley Earth will launch Synthesis, our most significant update yet—built to deliver clear, local, decision-ready climate intelligence.
💙 Support our work: donate.berkeleyearth.org?mc_cid=58fa7...
Reposted by Berkeley Earth
The big special report on the Hunga Tonga eruption is out:
juser.fz-juelich.de/record/10491...
After a couple years of arguing whether the net effect of aerosols+water vapor was warming or cooling, it includes this banger of a model ensemble that literally does cooling then warming.
juser.fz-juelich.de/record/10491...
After a couple years of arguing whether the net effect of aerosols+water vapor was warming or cooling, it includes this banger of a model ensemble that literally does cooling then warming.
December 19, 2025 at 2:53 PM
The big special report on the Hunga Tonga eruption is out:
juser.fz-juelich.de/record/10491...
After a couple years of arguing whether the net effect of aerosols+water vapor was warming or cooling, it includes this banger of a model ensemble that literally does cooling then warming.
juser.fz-juelich.de/record/10491...
After a couple years of arguing whether the net effect of aerosols+water vapor was warming or cooling, it includes this banger of a model ensemble that literally does cooling then warming.
Reposted by Berkeley Earth
In a new article over at Carbon Brief, I explore why the past three years – 2023, 2024, and 2025 – have been exceptionally warm. The main culprits turn out to be a combination of El Nino and internal variability, declining aerosols, and a strong solar cycle: www.carbonbrief.org/...
December 11, 2025 at 4:34 PM
In a new article over at Carbon Brief, I explore why the past three years – 2023, 2024, and 2025 – have been exceptionally warm. The main culprits turn out to be a combination of El Nino and internal variability, declining aerosols, and a strong solar cycle: www.carbonbrief.org/...
Reposted by Berkeley Earth
I have a new update to climate model-observation comparisons over at The Climate Brink, covering CMIP3, CMIP5, and CMIP6. Models perform well globally. The latest generation shows too much long-term warming but better reproduces recent trends: www.theclimatebrink....
December 6, 2025 at 8:42 PM
I have a new update to climate model-observation comparisons over at The Climate Brink, covering CMIP3, CMIP5, and CMIP6. Models perform well globally. The latest generation shows too much long-term warming but better reproduces recent trends: www.theclimatebrink....
Reposted by Berkeley Earth
Recently, @berkeleyearth.org expanded our temperature database by integrating the HCLIM data set.
nature.com/articles/s41...
The additional data rescued by HCLIM helps improve early reconstructions, but doesn't fundamentally change the large uncertainties due to sparse sampling.
1/
nature.com/articles/s41...
The additional data rescued by HCLIM helps improve early reconstructions, but doesn't fundamentally change the large uncertainties due to sparse sampling.
1/
December 2, 2025 at 12:09 PM
Recently, @berkeleyearth.org expanded our temperature database by integrating the HCLIM data set.
nature.com/articles/s41...
The additional data rescued by HCLIM helps improve early reconstructions, but doesn't fundamentally change the large uncertainties due to sparse sampling.
1/
nature.com/articles/s41...
The additional data rescued by HCLIM helps improve early reconstructions, but doesn't fundamentally change the large uncertainties due to sparse sampling.
1/
This #GivingTuesday, we’re reflecting on a year of change and what comes next.
In 2026, Berkeley Earth will launch Synthesis, our most significant update yet—built to deliver clear, local, decision-ready climate intelligence.
💙 Support our work: donate.berkeleyearth.org?mc_cid=58fa7...
In 2026, Berkeley Earth will launch Synthesis, our most significant update yet—built to deliver clear, local, decision-ready climate intelligence.
💙 Support our work: donate.berkeleyearth.org?mc_cid=58fa7...
December 2, 2025 at 10:02 PM
This #GivingTuesday, we’re reflecting on a year of change and what comes next.
In 2026, Berkeley Earth will launch Synthesis, our most significant update yet—built to deliver clear, local, decision-ready climate intelligence.
💙 Support our work: donate.berkeleyearth.org?mc_cid=58fa7...
In 2026, Berkeley Earth will launch Synthesis, our most significant update yet—built to deliver clear, local, decision-ready climate intelligence.
💙 Support our work: donate.berkeleyearth.org?mc_cid=58fa7...
Reposted by Berkeley Earth
New data from @berkeleyearth.org:
🎃 3rd. That is the ranking October 2025 now sits for the WARMEST October of record GLOBALLY, behind 2023 and 2024.
🌍 4% of Earth saw a record-hot October average.
🌡️94%. That's the current odds that 2025 will go down as the THIRD warmest year on record GLOBALLY
🎃 3rd. That is the ranking October 2025 now sits for the WARMEST October of record GLOBALLY, behind 2023 and 2024.
🌍 4% of Earth saw a record-hot October average.
🌡️94%. That's the current odds that 2025 will go down as the THIRD warmest year on record GLOBALLY
November 25, 2025 at 3:10 PM
New data from @berkeleyearth.org:
🎃 3rd. That is the ranking October 2025 now sits for the WARMEST October of record GLOBALLY, behind 2023 and 2024.
🌍 4% of Earth saw a record-hot October average.
🌡️94%. That's the current odds that 2025 will go down as the THIRD warmest year on record GLOBALLY
🎃 3rd. That is the ranking October 2025 now sits for the WARMEST October of record GLOBALLY, behind 2023 and 2024.
🌍 4% of Earth saw a record-hot October average.
🌡️94%. That's the current odds that 2025 will go down as the THIRD warmest year on record GLOBALLY
Temperature Update for October 2025
Third warmest October in the instrumental record.
Similar conditions to September.
A weak La Niña returns in the Pacific.
2025 is very likely to be the 3rd warmest year.
🧵🧪🌊
Third warmest October in the instrumental record.
Similar conditions to September.
A weak La Niña returns in the Pacific.
2025 is very likely to be the 3rd warmest year.
🧵🧪🌊
November 21, 2025 at 11:06 AM
Temperature Update for October 2025
Third warmest October in the instrumental record.
Similar conditions to September.
A weak La Niña returns in the Pacific.
2025 is very likely to be the 3rd warmest year.
🧵🧪🌊
Third warmest October in the instrumental record.
Similar conditions to September.
A weak La Niña returns in the Pacific.
2025 is very likely to be the 3rd warmest year.
🧵🧪🌊
⏰ Join Us Tomorrow!
Don’t miss this 30-minute live session featuring a brief presentation and Q&A with Berkeley Earth scientists on the latest climate trends and insights.
🔗 Register here: us02web.zoom.us/webinar/regi...
#ClimateScience #OpenScience #ScienceCommunication #BerkeleyEarth
Don’t miss this 30-minute live session featuring a brief presentation and Q&A with Berkeley Earth scientists on the latest climate trends and insights.
🔗 Register here: us02web.zoom.us/webinar/regi...
#ClimateScience #OpenScience #ScienceCommunication #BerkeleyEarth
🌍 Berkeley Earth Monthly Press Briefing
📅 Wed, Nov 19 | 8 AM PDT / 5 PM CET
Get the latest insights from our October 2025 Temperature Report and join a live Q&A with
@rarohde.bsky.social, @hausfath.bsky.social, and the Berkeley Earth team.
🔗 Register: us02web.zoom.us/webinar/regi...
📅 Wed, Nov 19 | 8 AM PDT / 5 PM CET
Get the latest insights from our October 2025 Temperature Report and join a live Q&A with
@rarohde.bsky.social, @hausfath.bsky.social, and the Berkeley Earth team.
🔗 Register: us02web.zoom.us/webinar/regi...
November 18, 2025 at 3:12 PM
⏰ Join Us Tomorrow!
Don’t miss this 30-minute live session featuring a brief presentation and Q&A with Berkeley Earth scientists on the latest climate trends and insights.
🔗 Register here: us02web.zoom.us/webinar/regi...
#ClimateScience #OpenScience #ScienceCommunication #BerkeleyEarth
Don’t miss this 30-minute live session featuring a brief presentation and Q&A with Berkeley Earth scientists on the latest climate trends and insights.
🔗 Register here: us02web.zoom.us/webinar/regi...
#ClimateScience #OpenScience #ScienceCommunication #BerkeleyEarth
🌍 Berkeley Earth Monthly Press Briefing
📅 Wed, Nov 19 | 8 AM PDT / 5 PM CET
Get the latest insights from our October 2025 Temperature Report and join a live Q&A with
@rarohde.bsky.social, @hausfath.bsky.social, and the Berkeley Earth team.
🔗 Register: us02web.zoom.us/webinar/regi...
📅 Wed, Nov 19 | 8 AM PDT / 5 PM CET
Get the latest insights from our October 2025 Temperature Report and join a live Q&A with
@rarohde.bsky.social, @hausfath.bsky.social, and the Berkeley Earth team.
🔗 Register: us02web.zoom.us/webinar/regi...
November 14, 2025 at 8:29 PM
🌍 Berkeley Earth Monthly Press Briefing
📅 Wed, Nov 19 | 8 AM PDT / 5 PM CET
Get the latest insights from our October 2025 Temperature Report and join a live Q&A with
@rarohde.bsky.social, @hausfath.bsky.social, and the Berkeley Earth team.
🔗 Register: us02web.zoom.us/webinar/regi...
📅 Wed, Nov 19 | 8 AM PDT / 5 PM CET
Get the latest insights from our October 2025 Temperature Report and join a live Q&A with
@rarohde.bsky.social, @hausfath.bsky.social, and the Berkeley Earth team.
🔗 Register: us02web.zoom.us/webinar/regi...
Reposted by Berkeley Earth
September 2025 was the third warmest on record in the Berkeley Earth dataset. But this downplays how anomalous it was; without 2023 and 2024 this year would have been well above any prior records and well above the long-term trend:
October 23, 2025 at 9:43 PM
September 2025 was the third warmest on record in the Berkeley Earth dataset. But this downplays how anomalous it was; without 2023 and 2024 this year would have been well above any prior records and well above the long-term trend:
⏰ Happening Tomorrow!
This 30-minute live session includes a short presentation and Q&A with our scientists on the latest climate trends.
🔗 Register Here: us02web.zoom.us/webinar/regi...
#ClimateScience #OpenScience #ClimateRisk #ScienceCommunication #BerkeleyEarth
This 30-minute live session includes a short presentation and Q&A with our scientists on the latest climate trends.
🔗 Register Here: us02web.zoom.us/webinar/regi...
#ClimateScience #OpenScience #ClimateRisk #ScienceCommunication #BerkeleyEarth
🌍 Berkeley Earth Monthly Press Briefing
📅 Thur 10/23 | 8 AM PDT / 5 PM CET
Join @rarohde.bsky.social , @hausfath.bsky.social, and our team for insights from the September 2025 Temperature Report + a live Q&A.
🔗 Register: us02web.zoom.us/webinar/regi...
📅 Thur 10/23 | 8 AM PDT / 5 PM CET
Join @rarohde.bsky.social , @hausfath.bsky.social, and our team for insights from the September 2025 Temperature Report + a live Q&A.
🔗 Register: us02web.zoom.us/webinar/regi...
October 22, 2025 at 3:15 PM
⏰ Happening Tomorrow!
This 30-minute live session includes a short presentation and Q&A with our scientists on the latest climate trends.
🔗 Register Here: us02web.zoom.us/webinar/regi...
#ClimateScience #OpenScience #ClimateRisk #ScienceCommunication #BerkeleyEarth
This 30-minute live session includes a short presentation and Q&A with our scientists on the latest climate trends.
🔗 Register Here: us02web.zoom.us/webinar/regi...
#ClimateScience #OpenScience #ClimateRisk #ScienceCommunication #BerkeleyEarth
🌍 Berkeley Earth Monthly Press Briefing
📅 Thur 10/23 | 8 AM PDT / 5 PM CET
Join @rarohde.bsky.social , @hausfath.bsky.social, and our team for insights from the September 2025 Temperature Report + a live Q&A.
🔗 Register: us02web.zoom.us/webinar/regi...
📅 Thur 10/23 | 8 AM PDT / 5 PM CET
Join @rarohde.bsky.social , @hausfath.bsky.social, and our team for insights from the September 2025 Temperature Report + a live Q&A.
🔗 Register: us02web.zoom.us/webinar/regi...
October 16, 2025 at 3:56 PM
🌍 Berkeley Earth Monthly Press Briefing
📅 Thur 10/23 | 8 AM PDT / 5 PM CET
Join @rarohde.bsky.social , @hausfath.bsky.social, and our team for insights from the September 2025 Temperature Report + a live Q&A.
🔗 Register: us02web.zoom.us/webinar/regi...
📅 Thur 10/23 | 8 AM PDT / 5 PM CET
Join @rarohde.bsky.social , @hausfath.bsky.social, and our team for insights from the September 2025 Temperature Report + a live Q&A.
🔗 Register: us02web.zoom.us/webinar/regi...
Reposted by Berkeley Earth
The Northern Pacific Ocean is currently smashing temperature records.
And it is reaching these levels far earlier than the current generation of climate models had expected.
A short thread 🧵
And it is reaching these levels far earlier than the current generation of climate models had expected.
A short thread 🧵
September 18, 2025 at 10:44 AM
The Northern Pacific Ocean is currently smashing temperature records.
And it is reaching these levels far earlier than the current generation of climate models had expected.
A short thread 🧵
And it is reaching these levels far earlier than the current generation of climate models had expected.
A short thread 🧵
⏰ Reminder: Tomorrow!
🌍 Berkeley Earth Monthly Press Briefing
📅 Wed 9/17 | 8am PDT / 5pm CET
Join @rarohde.bsky.social , @hausfath.bsky.social, and our team for insights from the August 2025 Temperature Report + a live Q&A.
🔗 Register: us02web.zoom.us/webinar/regi...
🌍 Berkeley Earth Monthly Press Briefing
📅 Wed 9/17 | 8am PDT / 5pm CET
Join @rarohde.bsky.social , @hausfath.bsky.social, and our team for insights from the August 2025 Temperature Report + a live Q&A.
🔗 Register: us02web.zoom.us/webinar/regi...
Welcome! You are invited to join a webinar: Berkeley Earth Monthly Press Briefing. After registering, you will receive a confirmation email about joining the webinar.
Berkeley Earth invites you to our next Monthly Press Briefing, where our scientists will present the latest global temperature findings and climate insights for August 2025.
This 30-minute session wi...
us02web.zoom.us
September 16, 2025 at 7:12 PM
⏰ Reminder: Tomorrow!
🌍 Berkeley Earth Monthly Press Briefing
📅 Wed 9/17 | 8am PDT / 5pm CET
Join @rarohde.bsky.social , @hausfath.bsky.social, and our team for insights from the August 2025 Temperature Report + a live Q&A.
🔗 Register: us02web.zoom.us/webinar/regi...
🌍 Berkeley Earth Monthly Press Briefing
📅 Wed 9/17 | 8am PDT / 5pm CET
Join @rarohde.bsky.social , @hausfath.bsky.social, and our team for insights from the August 2025 Temperature Report + a live Q&A.
🔗 Register: us02web.zoom.us/webinar/regi...
Back with Our Monthly Press Briefing!
Join @rarohde.bsky.social, @hausfath.bsky.social, and the Berkeley Earth team on Wed 9/17 at 8am PDT / 5pm CET.
We’ll share updates from the August 2025 Temperature Report and discuss the latest global climate signals.
Register: us02web.zoom.us/webinar/regi...
Join @rarohde.bsky.social, @hausfath.bsky.social, and the Berkeley Earth team on Wed 9/17 at 8am PDT / 5pm CET.
We’ll share updates from the August 2025 Temperature Report and discuss the latest global climate signals.
Register: us02web.zoom.us/webinar/regi...
September 10, 2025 at 7:01 PM
Back with Our Monthly Press Briefing!
Join @rarohde.bsky.social, @hausfath.bsky.social, and the Berkeley Earth team on Wed 9/17 at 8am PDT / 5pm CET.
We’ll share updates from the August 2025 Temperature Report and discuss the latest global climate signals.
Register: us02web.zoom.us/webinar/regi...
Join @rarohde.bsky.social, @hausfath.bsky.social, and the Berkeley Earth team on Wed 9/17 at 8am PDT / 5pm CET.
We’ll share updates from the August 2025 Temperature Report and discuss the latest global climate signals.
Register: us02web.zoom.us/webinar/regi...
Reposted by Berkeley Earth
The open water route along through the Arctic Ocean along the Russian Coast opened in early August this year.
That puts it among the Top 5 earliest opening dates, though still weeks behind the record set in 2020.
Prior to 2005, such open water passages rarely occurred at all.
That puts it among the Top 5 earliest opening dates, though still weeks behind the record set in 2020.
Prior to 2005, such open water passages rarely occurred at all.
August 19, 2025 at 9:27 PM
The open water route along through the Arctic Ocean along the Russian Coast opened in early August this year.
That puts it among the Top 5 earliest opening dates, though still weeks behind the record set in 2020.
Prior to 2005, such open water passages rarely occurred at all.
That puts it among the Top 5 earliest opening dates, though still weeks behind the record set in 2020.
Prior to 2005, such open water passages rarely occurred at all.
Reposted by Berkeley Earth
Happy to announce that I'll be serving as a lead author for Chapter 2 (titled "Large-scale changes in the climate system and their causes") of the upcoming IPCC 7th Assessment Report, alongside 21 other scientists from around the world: apps.ipcc.ch/report/...
August 18, 2025 at 7:17 PM
Happy to announce that I'll be serving as a lead author for Chapter 2 (titled "Large-scale changes in the climate system and their causes") of the upcoming IPCC 7th Assessment Report, alongside 21 other scientists from around the world: apps.ipcc.ch/report/...
Reposted by Berkeley Earth
For all the sea ice nerds, NSIDC has announced a new version of the sea ice index that replaces SSMIS data with AMSR2 (starting Jan 1, 2025 and continuing for all future updates).
This new dataset was developed in response to the plans to kill SSMIS.
nsidc.org/data/user-re...
This new dataset was developed in response to the plans to kill SSMIS.
nsidc.org/data/user-re...
New version release: NOAA/NSIDC Sea Ice Index, Version 4 | National Snow and Ice Data Center
NOAA@NSIDC is pleased to announce the release of Sea Ice Index, Version 4.
nsidc.org
August 1, 2025 at 11:14 AM
For all the sea ice nerds, NSIDC has announced a new version of the sea ice index that replaces SSMIS data with AMSR2 (starting Jan 1, 2025 and continuing for all future updates).
This new dataset was developed in response to the plans to kill SSMIS.
nsidc.org/data/user-re...
This new dataset was developed in response to the plans to kill SSMIS.
nsidc.org/data/user-re...
Reposted by Berkeley Earth
In most of the world day-to-day weather variations are still much larger than long-term global warming.
As a result, both daily record highs and daily record lows remain common.
However as the world warms, new daily record highs consistently far outnumber new daily record lows.
🧪
As a result, both daily record highs and daily record lows remain common.
However as the world warms, new daily record highs consistently far outnumber new daily record lows.
🧪
July 23, 2025 at 7:45 AM
In most of the world day-to-day weather variations are still much larger than long-term global warming.
As a result, both daily record highs and daily record lows remain common.
However as the world warms, new daily record highs consistently far outnumber new daily record lows.
🧪
As a result, both daily record highs and daily record lows remain common.
However as the world warms, new daily record highs consistently far outnumber new daily record lows.
🧪
Reposted by Berkeley Earth
Annual #Arctic air temperature anomalies over the last 120 years...
Data from @berkeleyearth.org. Graphic by zacklabe.com/arctic-sea-i...
Data from @berkeleyearth.org. Graphic by zacklabe.com/arctic-sea-i...
July 27, 2025 at 2:40 AM
Annual #Arctic air temperature anomalies over the last 120 years...
Data from @berkeleyearth.org. Graphic by zacklabe.com/arctic-sea-i...
Data from @berkeleyearth.org. Graphic by zacklabe.com/arctic-sea-i...
Temperature Update for June 2025
Third warmest June in the instrumental record.
Similar conditions to May, but sharply cooler than earlier in 2025.
Neutral conditions in the Pacific.
2025 is very likely to be the 2nd or 3rd warmest year.
berkeleyearth.org/june-2025-te...
🧵
Third warmest June in the instrumental record.
Similar conditions to May, but sharply cooler than earlier in 2025.
Neutral conditions in the Pacific.
2025 is very likely to be the 2nd or 3rd warmest year.
berkeleyearth.org/june-2025-te...
🧵
July 11, 2025 at 12:40 PM
Temperature Update for June 2025
Third warmest June in the instrumental record.
Similar conditions to May, but sharply cooler than earlier in 2025.
Neutral conditions in the Pacific.
2025 is very likely to be the 2nd or 3rd warmest year.
berkeleyearth.org/june-2025-te...
🧵
Third warmest June in the instrumental record.
Similar conditions to May, but sharply cooler than earlier in 2025.
Neutral conditions in the Pacific.
2025 is very likely to be the 2nd or 3rd warmest year.
berkeleyearth.org/june-2025-te...
🧵
Join @rarohde.bsky.social, @hausfath.bsky.social and the Berkeley Earth team this Thurs 7/10 at 8am PDT/5pm CET for our next monthly press briefing featuring updates and insights from our June 2025 Temperature Update.
🔗 To register: us02web.zoom.us/webinar/regi...
🔗 To register: us02web.zoom.us/webinar/regi...
July 8, 2025 at 8:44 PM
Join @rarohde.bsky.social, @hausfath.bsky.social and the Berkeley Earth team this Thurs 7/10 at 8am PDT/5pm CET for our next monthly press briefing featuring updates and insights from our June 2025 Temperature Update.
🔗 To register: us02web.zoom.us/webinar/regi...
🔗 To register: us02web.zoom.us/webinar/regi...
Reposted by Berkeley Earth
The Western Mediterranean has been record warm recently, shown here for the June averages from ERA5.
This much warmth in the Mediterranean may predict a brutally hot summer for Europe.
1/ 🧵🧪🌊
This much warmth in the Mediterranean may predict a brutally hot summer for Europe.
1/ 🧵🧪🌊
July 8, 2025 at 9:31 AM
The Western Mediterranean has been record warm recently, shown here for the June averages from ERA5.
This much warmth in the Mediterranean may predict a brutally hot summer for Europe.
1/ 🧵🧪🌊
This much warmth in the Mediterranean may predict a brutally hot summer for Europe.
1/ 🧵🧪🌊
Reposted by Berkeley Earth
Berkeley Earth's next monthly climate briefing, looking back on June temperatures, will be held online on July 10th at 8 AM PT / 11 AM ET / 5 PM CET.
us02web.zoom.us/webinar/regi...
It's open for anyone, but geared toward the news media.
See you there.
us02web.zoom.us/webinar/regi...
It's open for anyone, but geared toward the news media.
See you there.
July 4, 2025 at 7:48 AM
Berkeley Earth's next monthly climate briefing, looking back on June temperatures, will be held online on July 10th at 8 AM PT / 11 AM ET / 5 PM CET.
us02web.zoom.us/webinar/regi...
It's open for anyone, but geared toward the news media.
See you there.
us02web.zoom.us/webinar/regi...
It's open for anyone, but geared toward the news media.
See you there.
Reposted by Berkeley Earth
2025 is still on track to be one of the top three warmest years on record, according to Zeke Hausfather from @berkeleyearth.org. www.theweathernetwork.com/en/news/clim...
After the puzzling warmth in 2023 and 2024, what could 2025 have in store? - The Weather Network
Land and ocean temperatures have fallen, but are still near record highs
www.theweathernetwork.com
June 29, 2025 at 5:43 PM
2025 is still on track to be one of the top three warmest years on record, according to Zeke Hausfather from @berkeleyearth.org. www.theweathernetwork.com/en/news/clim...