Atmospheric Sciences
@atmsciences.bsky.social
Weather and Climate; Stratosphere, UV, AQ, methane; hydrogen; EU CAMS, ESA remote sensing etc ; employed at knmi.nl ; If we would change, climate wouldn’t need to; @MichielvanWeele.bsky.social
In one of his last posts in september 2021 Geert Jan van Oldenborgh expressed his trust in the young generation to rise to the challenge of the energy transition and that it will be hard work. It will even harder in the US than could be imagined at that time. The trust remains.
February 13, 2026 at 7:18 AM
In one of his last posts in september 2021 Geert Jan van Oldenborgh expressed his trust in the young generation to rise to the challenge of the energy transition and that it will be hard work. It will even harder in the US than could be imagined at that time. The trust remains.
Reposted by Atmospheric Sciences
Scientific integrity: AGU Denounces Trump Administration’s Repeal of the EPA Endangerment Finding
AGU Denounces Trump Administration’s Repeal of the EPA Endangerment Finding
In 1856, American scientist Eunice Foote made history by publishing the first academic paper demonstrating that carbon dioxide traps heat from the Sun, a discovery that laid the foundation for climate...
fromtheprow.agu.org
February 13, 2026 at 6:35 AM
Scientific integrity: AGU Denounces Trump Administration’s Repeal of the EPA Endangerment Finding
The new satellite mission STRIVE will look through the limb of the atmosphere, in the infrared, to take vertical profiles (~5-50 km) of temperature and composition throughout the upper troposphere and stratosphere from 2030 onwards. Very good news.
NASA greenlights two earth science missions, to researchers’ relief
Orbiting satellites will monitor changes in the stratosphere and on the planet’s surface
www.science.org
February 12, 2026 at 4:23 AM
The new satellite mission STRIVE will look through the limb of the atmosphere, in the infrared, to take vertical profiles (~5-50 km) of temperature and composition throughout the upper troposphere and stratosphere from 2030 onwards. Very good news.
In ‘Defining El Niño indices in a warming climate’ Geert Jan van Oldenborgh (Royal Netherlands Meteorological Institute) et al., 2021 noted that the 2016-17 La Niña event had more intense effects than expected. With increased attention and lead time, greater and earlier action could have been taken.
A new and better way to keep tabs on El Niño and La Niña » Yale Climate Connections
Developed in response to a warming world, NOAA’s revised scale more precisely identifies which episodes are likely to have the biggest impacts.
yaleclimateconnections.org
February 5, 2026 at 6:37 PM
In ‘Defining El Niño indices in a warming climate’ Geert Jan van Oldenborgh (Royal Netherlands Meteorological Institute) et al., 2021 noted that the 2016-17 La Niña event had more intense effects than expected. With increased attention and lead time, greater and earlier action could have been taken.
Reposted by Atmospheric Sciences
Two big updates in the ocean temperature world:
1) The determination of the phase of ENSO ( #ElNiño, #LaNiña) will operationally transition to the RELATIVE Oceanic Niño Index ( #RONI) on February 1:
www.weather.gov/media/notifi...
[1/3]
1) The determination of the phase of ENSO ( #ElNiño, #LaNiña) will operationally transition to the RELATIVE Oceanic Niño Index ( #RONI) on February 1:
www.weather.gov/media/notifi...
[1/3]
www.weather.gov
January 29, 2026 at 12:03 AM
Two big updates in the ocean temperature world:
1) The determination of the phase of ENSO ( #ElNiño, #LaNiña) will operationally transition to the RELATIVE Oceanic Niño Index ( #RONI) on February 1:
www.weather.gov/media/notifi...
[1/3]
1) The determination of the phase of ENSO ( #ElNiño, #LaNiña) will operationally transition to the RELATIVE Oceanic Niño Index ( #RONI) on February 1:
www.weather.gov/media/notifi...
[1/3]
Warm Arctic, cold continents, www.euronews.com/green/2026/0...
January 24, 2026 at 8:23 AM
Warm Arctic, cold continents, www.euronews.com/green/2026/0...
Reposted by Atmospheric Sciences
A tale of two press releases. One says the jet stream is slowing down, the other says it is speeding up. How can they both be right? In fact, as I explained in this talk at the Andorra Weather Meeting, there is no contradiction. The jet stream is changing in different ways at different altitudes.
January 20, 2026 at 9:59 PM
A tale of two press releases. One says the jet stream is slowing down, the other says it is speeding up. How can they both be right? In fact, as I explained in this talk at the Andorra Weather Meeting, there is no contradiction. The jet stream is changing in different ways at different altitudes.
Reposted by Atmospheric Sciences
In JGR: Atmospheres, scientists present the GOES Eastern U.S. Fire Emissions (GEUFE, pronounced “goofy”) inventory, which improves fire detection using frequent observations from the GOES-16 satellite.🛰️
🔗 Check out the #OpenAccess article: buff.ly/muRiMkS
#AGUPubs #Wildfire #ClimateChange
🔗 Check out the #OpenAccess article: buff.ly/muRiMkS
#AGUPubs #Wildfire #ClimateChange
January 20, 2026 at 10:01 PM
In JGR: Atmospheres, scientists present the GOES Eastern U.S. Fire Emissions (GEUFE, pronounced “goofy”) inventory, which improves fire detection using frequent observations from the GOES-16 satellite.🛰️
🔗 Check out the #OpenAccess article: buff.ly/muRiMkS
#AGUPubs #Wildfire #ClimateChange
🔗 Check out the #OpenAccess article: buff.ly/muRiMkS
#AGUPubs #Wildfire #ClimateChange
Reposted by Atmospheric Sciences
🧵
You’re invited! Join the 9th CAMS Policy User Workshop in Budapest on 4–5 March 2026 hosted by HungaroMet and organised with the 2026 FAIRMODE plenary.
You’re invited! Join the 9th CAMS Policy User Workshop in Budapest on 4–5 March 2026 hosted by HungaroMet and organised with the 2026 FAIRMODE plenary.
December 22, 2025 at 10:05 AM
🧵
You’re invited! Join the 9th CAMS Policy User Workshop in Budapest on 4–5 March 2026 hosted by HungaroMet and organised with the 2026 FAIRMODE plenary.
You’re invited! Join the 9th CAMS Policy User Workshop in Budapest on 4–5 March 2026 hosted by HungaroMet and organised with the 2026 FAIRMODE plenary.
How climate breakdown is putting the world’s food in peril - in maps and charts www.theguardian.com/environment/...
December 18, 2025 at 8:24 AM
How climate breakdown is putting the world’s food in peril - in maps and charts www.theguardian.com/environment/...
Reposted by Atmospheric Sciences
An update of the Global Hydrogen Budget.
The biggest source of H2 into the atmosphere is oxidation of CH4 and NMVOCs. So if you care about the climate effects of H2, reduce your CH4 emissions...
www.nature.com/articles/s41...
1/
The biggest source of H2 into the atmosphere is oxidation of CH4 and NMVOCs. So if you care about the climate effects of H2, reduce your CH4 emissions...
www.nature.com/articles/s41...
1/
December 18, 2025 at 7:57 AM
An update of the Global Hydrogen Budget.
The biggest source of H2 into the atmosphere is oxidation of CH4 and NMVOCs. So if you care about the climate effects of H2, reduce your CH4 emissions...
www.nature.com/articles/s41...
1/
The biggest source of H2 into the atmosphere is oxidation of CH4 and NMVOCs. So if you care about the climate effects of H2, reduce your CH4 emissions...
www.nature.com/articles/s41...
1/
A cold spell in Europe until the end of the year. The episode is not likely to grow in strength and duration. Weather in Scandinavia seems to remain quite mild this month. Sustained cold weather in central Europe would need a very cold region from where cold air could be advected.
December 17, 2025 at 8:20 AM
A cold spell in Europe until the end of the year. The episode is not likely to grow in strength and duration. Weather in Scandinavia seems to remain quite mild this month. Sustained cold weather in central Europe would need a very cold region from where cold air could be advected.
Reposted by Atmospheric Sciences
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 Atmospheric Sciences
This is a legitimate scientific revolution in meteorology.
Also, to be clear, these models are not the AI LLMs that most people are familiar with. They are machine learning algorithms trained on observations (actually reanalysis).
Also, to be clear, these models are not the AI LLMs that most people are familiar with. They are machine learning algorithms trained on observations (actually reanalysis).
Meteorologists are surprised that the weather model that did the best job forecasting hurricanes this year was a new one, introduced by Google. AI may be the beginning of a new era of forecasting. n.pr/49MFa1M
As the 2025 Atlantic hurricane season ends, the future of forecasting is AI
Meteorologists are surprised that the weather model that did the best job forecasting hurricanes this year was a new one, introduced by Google. AI may be the beginning of a new era of forecasting.
n.pr
November 30, 2025 at 5:55 AM
This is a legitimate scientific revolution in meteorology.
Also, to be clear, these models are not the AI LLMs that most people are familiar with. They are machine learning algorithms trained on observations (actually reanalysis).
Also, to be clear, these models are not the AI LLMs that most people are familiar with. They are machine learning algorithms trained on observations (actually reanalysis).
Reposted by Atmospheric Sciences
UK ‘not in favor’ of dimming the sun
https://www.politico.eu/article/uk-not-in-favor-of-dimming-the-sun-but-willing-to-debate-regulation/
Government says it opposes the cutting-edge and controversial climate tech, but is willing to debate its regulation.
We don't need "regulation", just an out […]
https://www.politico.eu/article/uk-not-in-favor-of-dimming-the-sun-but-willing-to-debate-regulation/
Government says it opposes the cutting-edge and controversial climate tech, but is willing to debate its regulation.
We don't need "regulation", just an out […]
Original post on mastodon.scot
mastodon.scot
November 29, 2025 at 4:02 PM
UK ‘not in favor’ of dimming the sun
https://www.politico.eu/article/uk-not-in-favor-of-dimming-the-sun-but-willing-to-debate-regulation/
Government says it opposes the cutting-edge and controversial climate tech, but is willing to debate its regulation.
We don't need "regulation", just an out […]
https://www.politico.eu/article/uk-not-in-favor-of-dimming-the-sun-but-willing-to-debate-regulation/
Government says it opposes the cutting-edge and controversial climate tech, but is willing to debate its regulation.
We don't need "regulation", just an out […]
Latest ECMWF forecast of the zonal mean zonal wind at the 10 hPa level, picking up in strength, and reestablishing to normal polar vortex wind speeds within the coming week
November 28, 2025 at 4:41 AM
Latest ECMWF forecast of the zonal mean zonal wind at the 10 hPa level, picking up in strength, and reestablishing to normal polar vortex wind speeds within the coming week
Reposted by Atmospheric Sciences
Incredible footage of volcanic eruption of a dormant volcano in Ethiopia from a commercial plane.
A sight seen for the first time in recorded history. ⌚
A sight seen for the first time in recorded history. ⌚
November 27, 2025 at 9:08 PM
Incredible footage of volcanic eruption of a dormant volcano in Ethiopia from a commercial plane.
A sight seen for the first time in recorded history. ⌚
A sight seen for the first time in recorded history. ⌚
Reposted by Atmospheric Sciences
Contrails act like short-lived climate forcers. Here was the 1-2% estimate recently (re-)stated: www.rff.org/publications...
Contrails, Aviation, and Climate Change
Contrails, Aviation, and Climate Change
www.rff.org
November 26, 2025 at 6:30 PM
Contrails act like short-lived climate forcers. Here was the 1-2% estimate recently (re-)stated: www.rff.org/publications...
Reposted by Atmospheric Sciences
Najnowszy wpis na blogu o pionierskim zdobyciu przez Tomasza wulkanu tarczowego #HayliGubbi #Afar #Etiopia #Afryka/ Various photos of #HayliGubbi #volcano in #Afar #Ethiopia Link: wulkanyswiata.blogspot.com/2025/03/hayl...
Hayli Gubbi: pionierskie zdjęcia wulkanu tarczowego w Etiopii
21 lutego 2025 roku Tomaszowi udało się wejść na etiopski wulkan tarczowy Hayli Gubbi ...
wulkanyswiata.blogspot.com
March 6, 2025 at 8:59 AM
Najnowszy wpis na blogu o pionierskim zdobyciu przez Tomasza wulkanu tarczowego #HayliGubbi #Afar #Etiopia #Afryka/ Various photos of #HayliGubbi #volcano in #Afar #Ethiopia Link: wulkanyswiata.blogspot.com/2025/03/hayl...
Reposted by Atmospheric Sciences
#ETHIOPIA: Hayli Gubbi is the southern most #volcano of the Erta Ale Range erupts today violently after 10,000years…..it is the northern end of the Great Rift Valley. 1/2
#HayliGubbi
#HayliGubbi
November 24, 2025 at 2:42 AM
#ETHIOPIA: Hayli Gubbi is the southern most #volcano of the Erta Ale Range erupts today violently after 10,000years…..it is the northern end of the Great Rift Valley. 1/2
#HayliGubbi
#HayliGubbi
Reposted by Atmospheric Sciences
An eruption from the #HayliGubbi volcano in #Ethiopia resulted in a large ash cloud, visible here from space. 🌋
This impressive view was seen 36,000km above Earth by our Meteosat-12 satellite on 23 November at 13:40 UTC.
This impressive view was seen 36,000km above Earth by our Meteosat-12 satellite on 23 November at 13:40 UTC.
November 24, 2025 at 10:10 AM
An eruption from the #HayliGubbi volcano in #Ethiopia resulted in a large ash cloud, visible here from space. 🌋
This impressive view was seen 36,000km above Earth by our Meteosat-12 satellite on 23 November at 13:40 UTC.
This impressive view was seen 36,000km above Earth by our Meteosat-12 satellite on 23 November at 13:40 UTC.
Reposted by Atmospheric Sciences
1️⃣ Der #Vulkan #HayliGubbi ist nach Tausenden von Jahren in der Afar-Region, #Äthiopien, ausgebrochen⤵️
November 24, 2025 at 10:19 AM
1️⃣ Der #Vulkan #HayliGubbi ist nach Tausenden von Jahren in der Afar-Region, #Äthiopien, ausgebrochen⤵️
Reposted by Atmospheric Sciences
Sentinel-5P #TROPOMI measurements at ~11:00 UTC show most of the SO₂ emissions from #HayliGubbi spreading east in the upper troposphere. Plume contains ~44 kilotons of SO₂ (~0.04 Tg).
November 23, 2025 at 5:53 PM
Sentinel-5P #TROPOMI measurements at ~11:00 UTC show most of the SO₂ emissions from #HayliGubbi spreading east in the upper troposphere. Plume contains ~44 kilotons of SO₂ (~0.04 Tg).
Reposted by Atmospheric Sciences
An explosive #eruption of Hayli Gubbi #volcano, located SE of Erta'Ale in the Afar Rift (Ethiopia), began at ~08:30 UTC on Nov 23. Eruption onset was fortuitously captured by a @planet.com overpass at 08:31 UTC. Hayli Gubbi has no record of Holocene eruptions. Toulouse VAAC reporting ash to ~15 km.
November 23, 2025 at 5:23 PM
An explosive #eruption of Hayli Gubbi #volcano, located SE of Erta'Ale in the Afar Rift (Ethiopia), began at ~08:30 UTC on Nov 23. Eruption onset was fortuitously captured by a @planet.com overpass at 08:31 UTC. Hayli Gubbi has no record of Holocene eruptions. Toulouse VAAC reporting ash to ~15 km.