Atmospheric Sciences
LightNews LightNews
banner
atmsciences.bsky.social
Atmospheric Sciences
@atmsciences.bsky.social
2.8K followers 660 following 360 posts
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
Posts Replies Media Videos
Reposted by Atmospheric Sciences
copernicusecmwf.bsky.social
Global total estimated fire emissions were the second-lowest in the 24-year CAMS dataset for September 2026. However, Indonesia recorded its third-highest September monthly total estimated emissions, contributing to Asia having the highest estimated fire emissions of any continent.
⬇️

@ecmwf.int
October 6, 2026 at 10:27 AM
Reposted by Atmospheric Sciences
rarohde.bsky.social
Temperatures in the Central Pacific El Niño region are the hottest ever measured (top panel), and far above any other El Niño at this time of year.

But, if you adjust for the warming of the global ocean, the current trajectory is not so different from other very strong events.
Two panel plot showing daily time series of temperature anomalies in the Central Pacific Nino3.4 region during the last four strongest El Niño events without and with correction for changes in global ocean mean temperature.
September 30, 2026 at 8:22 AM
Reposted by Atmospheric Sciences
copernicusecmwf.bsky.social
🌫️ Air pollution knows no borders.

In 2026 so far, 40% of global population was exposed to harmful ozone pollution, & wildfire smoke & desert dust affected regional and hemispheric air quality.

🔗 Explore the full story in CAMS #AtmosphereWatch: atmosphere.copernicus.eu/air-quality/...

@ecmwf.int
September 30, 2026 at 7:10 AM
Reposted by Atmospheric Sciences
copernicusecmwf.bsky.social
The CAMS Atmosphere Watch explores the air we share: ozone, the invisible pollutant that crosses borders; wildfire smoke that can turn local disasters into continental air pollution episodes; and dust, the global traveller.

Discover the data behind it:
atmosphere.copernicus.eu/atmosphere-w...
September 30, 2026 at 3:04 PM
atmsciences.bsky.social
The 2026 ozone hole has reached its maximum size and depth in this season www.temis.nl/protocols/o3...
Maximum size and depth of the 2026 ozone hole
September 28, 2026 at 7:09 PM
atmsciences.bsky.social
ARGO floats in the oceans www.linkedin.com/posts/freder...
Fascinerend schouwspel van 20.495 krioelende Argo-floats die sinds 1998 te… | Frédérik Ruys
Fascinerend schouwspel van 20.495 krioelende Argo-floats die sinds 1998 te water zijn gelaten. Deze ronddobberende meetinstrumenten brengen temperatuur en zoutgehalte van de oceaan in kaart en duiken...
www.linkedin.com
September 21, 2026 at 8:10 PM
atmsciences.bsky.social
Significant less NOx emissions and therefore much smaller NO2 concentrations in the atmosphere through technical developments and decades of environmental policies. Coming years EV will help to reduce NO2 further in The Netherlands.
September 20, 2026 at 8:19 PM
Reposted by Atmospheric Sciences
globaloceanbgc.bsky.social
NSF has funded over 80% of the world's BGC-Argo floats via GO-BGC, which ends in October 2026, so the global array will start shrinking. NSF is asking US researchers to weigh in on future ocean observing priorities: www.go-bgc.org/nsf/nsf-requ...
September 14, 2026 at 4:17 PM
atmsciences.bsky.social
Rising temperatures, stagnant atmospheric conditions and intense solar radiation promote ground-level ozone formation, as shown by recent studies during heatwaves in the south-eastern USA, Europe and China. wmo.int/media/news/w...
WMO bulletin shows air quality and climate interlinkages
An increase in pollution from wildfires and heatwaves risks undermining international efforts to improve air quality and protect human and ecosystem health, according to a new report from the World Me...
wmo.int
September 14, 2026 at 7:42 PM
atmsciences.bsky.social
Europe’s air quality has improved over recent decades, but episodic pollution events continue to create periods of elevated exposure and health risk. health.hub.copernicus.eu/european-air...
European air quality in 2025: from pollution episodes to health risks
Europe’s air quality has improved over recent decades, but episodic pollution events continue to create periods of elevated exposure and health risk. Understanding when and where these episodes occur,...
health.hub.copernicus.eu
September 14, 2026 at 7:33 PM
Reposted by Atmospheric Sciences
michielvanweele.bsky.social
www.earth.com/climate/sate...
Satellites expose hidden carbon emissions pouring out of oil and gas sites
Satellite data reveal oil and gas sites in the Middle East and northern Africa emit up to 30% more carbon dioxide than official records show.
www.earth.com
September 11, 2026 at 9:53 PM
Reposted by Atmospheric Sciences
ayanaeliza.bsky.social
Could have used AI to do this for me. But so glad I grappled with this 140+ pg PDF unassisted. Gratifying use of 5 hours to take a break from the frenzy to think (and feel!) deeply what all this means. Shoutout to book reports! ayanaelizabeth.substack.com/p/i-read-the...
I read the new UN climate report so you don't have to.
TL;DR they are calling for radical transformation of our society.
ayanaelizabeth.substack.com
September 9, 2026 at 11:58 PM
atmsciences.bsky.social
Early signs of reduced fossil fuel use in Europe from Sentinel-5P NOx emissions eo4society.esa.int/2026/09/04/e...
Early signs of reduced fossil fuel use in Europe from Sentinel-5P NOx emissions - eo science for society
The burning of fossil fuels (oil, gas, coal) leads to both CO2 and NOx emissions. Therefore, satellite NO2 observations can provide a fingerprint of
eo4society.esa.int
September 9, 2026 at 3:53 AM
Reposted by Atmospheric Sciences
climate.us
Sea Ice Today is back! For nearly two decades, scientists at the National Snow and Ice Data Center, or NSIDC, have helped people understand what is happening to sea ice in the Arctic and around Antarctica. Its monthly science analyses were paused last fall. buff.ly/e20zCU6
September 9, 2026 at 12:14 AM
atmsciences.bsky.social
Technical users of KNMI weather data need to take action before the end of 2026. Make use of API-key
knmi.nl KNMI @knmi.nl · Sep 7
De weergegevens van het KNMI zijn openbaar en voor iedereen beschikbaar, maar tot voor kort waren ze niet altijd makkelijk te bekijken. De KNMI Dataverkenner is een nieuwe website die op een interactieve en laagdrempelige manier toegang biedt tot een groot aantal van deze gegevens.
Ontdek het weer in de KNMI Dataverkenner
De weergegevens van het KNMI zijn openbaar en voor iedereen beschikbaar, maar tot voor kort waren ze niet altijd makkelijk te bekijken. De KNMI Dat...
www.knmi.nl
September 7, 2026 at 7:56 AM
Reposted by Atmospheric Sciences
marcolangbroek.bsky.social
1/2
The Anak #Krakatau volcano in Indonesia showing a strong #eruption this morning, in a Sentinel 2C #satellite image from 2:55 UTC (5 Sept 2026).
Eruptive ash clouds and discoloured water in a Sentinel 2C satellite image from 2:55 UTC (5 Sept 2026). Contains modified Copernicus Sentinel data. Image processing Marco Langbroek
September 5, 2026 at 3:39 PM
Reposted by Atmospheric Sciences
mparrington.bsky.social
The #Krakatau 🌋sulphur dioxide plume in the #CopernicusAtmosphere column integrated volcanic SO2 analysis, assimilating GOME-2, TROPOMI & IASI (+layer height) 🛰️ observations, valid for 6 Sept 00UTC. Data access➡️ ads.atmosphere.copernicus.eu/datasets/cam... @copernicusecmwf.bsky.social @ecmwf.int
Global map, centred on western Indonesia, showing the extent of the plume of column integrated mass density of volcanic SO2 as it extends from the Anak Krakatau volcano out to the Indian Ocean in the Copernicus Atmosphere Monitoring Service analysis valid for 00 UTC on 6 September.
September 6, 2026 at 8:03 PM
atmsciences.bsky.social
Significant SO2 from #krakatau
tropomiso2.bsky.social TROPOMI SO2 @tropomiso2.bsky.social · Sep 6
On 2026-09-06 #TROPOMI has detected an enhanced SO2 signal of 44.52DU at a distance of 321.8km to #Krakatau at an altitude of ~4.9km. #DLR_inpuls #S5p #Sentinel5p #TROPOMI #SO2LH
TROPOMI SO2 detection in the vicinity of Krakatau
September 7, 2026 at 6:55 AM
atmsciences.bsky.social
Changing building regulations can”t keep up with climate change and associated summer heat in The Netherlands. E.g outdoor blinds or just keeping sunshine out is not obliged in the building of new appartments.
michielvanweele.bsky.social Michiel van Weele @michielvanweele.bsky.social · Sep 6
De huizen die we nu bouwen moeten nog tientallen jaren mee, maar ze worden ontworpen voor een klimaat dat koeler is dan nu. Daardoor dreigen woningen die nu aan de regels voldoen, later alsnog te heet te worden.
We bouwen nieuwe huizen op het klimaat van gisteren
De huizen die we nu bouwen moeten nog tientallen jaren mee, maar ze worden ontworpen voor een klimaat dat koeler is dan nu. Daardoor dreigen woningen die nu aan de regels voldoen, later alsnog te heet...
www.nu.nl
September 6, 2026 at 3:58 AM
atmsciences.bsky.social
Later today is the UN General Assembly is holding its final 114th Plenary Meeting of the 80th Session. [1] (webtv.un.org/en/schedule)... Vote: During this wrap-up plenary meeting, member states are voting on draft resolution A/80/L.104 (known as the "#CorrectTheMap" initiative).
September 4, 2026 at 10:22 AM
atmsciences.bsky.social
Summer 2003 visually compared with Summer 2026
September 3, 2026 at 6:11 PM
Reposted by Atmospheric Sciences
michielvanweele.bsky.social
Review of methods for assessing the climate impacts of aviation technologies and the resulting best practices link.springer.com/content/pdf/...
CO2equivalent over CO2 baseline climate impact for aviation
August 31, 2026 at 9:04 PM
atmsciences.bsky.social
Optimist: The cup is half full

Pessimist: The cup is half empty

Climate model scientist: A FULL CUP IS NOT CALCULATED, EITHER PRECIPATION IS TOO SMALL OR EVAPORATION IS TOO HIGH, AND VERY LIKELY BOTH (mid-scenario; medium confidence)
zandraselina.bsky.social Zandra Fagernäs @zandraselina.bsky.social · Aug 22
Optimist: The cup is half full

Pessimist: The cup is half empty

Lab manager: WHY IS THERE A RANDOM CUP OF UNLABELLED LIQUID HERE?! WHO DID THIS?!?!
simonhammann.bsky.social Simon Hammann @simonhammann.bsky.social · Aug 22
Optimist: The cup is half full

Pessimist: The cup is half empty

Chemist: WHY THE HELL WOULD YOU POUR HYDROFLUORIC ACID IN A GLASS CUP?!! I WANT MY CUP BACK!!
August 22, 2026 at 3:40 PM
Reposted by Atmospheric Sciences
zacklabe.com
Wednesday El Niño update - Sea surface temperatures of course remain at record high levels in Niño3.4. While there has been little change in the anomaly field over the last week, we continue to see an exceptional eastern shift of the warm pool & another absurd westerly wind burst.

Data: OISSTv2.1 🌊
Line graph time series of daily sea surface temperature anomalies in the Nino3.4 region. Years are shown from 1982 to 2025 in shades of blue to light yellow, and 2026 is shown in red. Climatologically, the largest anomalies are during the boreal winter in terms of magnitude. Data is from OISSTv2.1. Map of August 18, 2026 average sea surface temperature anomalies in the ENSO monitoring regions. Data is from NOAA OISSTv2.1 with anomalies relative to a 1991-2020 baseline. Graphic showing the 1-week change in sea surface temperature anomalies across the tropical eastern Pacific Ocean from August 11, 2026 to August 18, 2026. Data is from NOAA OISSTv2.1 Graphic showing the 2-week change in sea surface temperature anomalies across the tropical eastern Pacific Ocean from August 4, 2026 to August 18, 2026. Data is from NOAA OISSTv2.1
August 20, 2026 at 12:29 AM
Reposted by Atmospheric Sciences
rudysovinee.bsky.social
2/2 How will this El Niño unfold? Forecasters expect further, exceptional intensification. NOAA assigns roughly an 81% chance of very strong conditions during Oct–Dec 2026 and a 63% chance of a “super” El Niño peaking around Nov 2026 to Jan 2027. NOAA gives a 97% chance it persists till early spring
Daily Niño 3.4 sea surface temperature anomaly for every year since 1982 (gray), with 2026 in red and the strong 1997 and 2015 El Niño development years highlighted. Anomalies are measured against each year’s own 30-year climatology, which removes the long-term warming trend. As of early August, 2026 sits above all prior years for the date. Source: Climate Dashboard analysis of NOAA OISSTv2.1 (Niño 3.4 box, 5°S–5°N, 170°–120°W). The El Niño that emerged in the spring has continued to strengthen rapidly. As of early August 2026, NOAA’s Climate Prediction Center has an El Niño Advisory in effect, and the daily Niño 3.4 index has climbed to about +2.7 °C measured against its own era’s climatology — the trend-removed basis shown in the figure below, equivalent to roughly +2.8 °C on the conventional fixed baseline, or about +2.2 °C on the background-adjusted relative index — already well into very strong or “super” territory. No El Niño in the modern record has run this warm this early in its development: measured against each year’s own climatology, 2026 is now tracking above even the great 1997 and 2015 events at the same point in the year. The warming is being reinforced by physical ocean processes, including downwelling Kelvin waves and a large subsurface warm pool in the equatorial Pacific. https://berkeley-earth-wp-offload.storage.googleapis.com/wp-content/uploads/2026/08/12122618/download-1024x666.png https://berkeleyearth.org/july-2026-temperature-update/ 2026 Outlook With seven months of data in hand, the outlook for the 2026 annual average has shifted decisively upward. Where a month ago a record year looked unlikely, the strengthening El Niño and July’s move above 1.5 °C have flipped the balance: we now calculate roughly a 69% chance that 2026 will become the warmest year on record, up from 12% in the June update. The forecast model, which had been more skeptical of the El Niño’s near-term impact than the ENSO ensembles, has now come into closer agreement with them. The most likely alternative is a 2nd-place finish (about 30%). We currently estimate a near-certain (~99%) chance that the 2026 annual average will exceed 1.5 °C (2.7 °F) above the 1850–1900 average, with a likely annual range of roughly 1.52–1.65 °C. As always, because El Niño’s global impact lags its Pacific peak, an even larger warming influence — and a strong chance of a further record — is expected in 2027. Remarkably, there is likely to be a disconnect in 2026 between record warmth in the ocean and less-than-record warmth on land. On land, we estimate a < 1% chance of record warmth in 2026, with a 47% chance of 2nd place finish behind 2024. Year-to-date the land average has been only the 4th warmest on record. While the land average is near certain to finish in the top 5 warmest, the relatively cool conditions on land early in 2026 have been holding the average back, and the expected effects of El Niño do not appear to be sufficient to create a record annual-average on land in 2026. https://berkeley-earth-wp-offload.storage.googleapis.com/wp-content/uploads/2026/08/12121902/Annual_time_series_combined-1024x576.png https://berkeleyearth.org/july-2026-temperature-update/ Same as the above image but Niño 3.4 region temperatures have been reduced by the average temperature of the tropical oceans (20° S – 20° N) to create the so-called reduced Oceanic Niño Index (rONI). Even when correcting for the average rate of warming of the tropical oceans, as shown below, the current El Niño conditions appear unprecedented for July within the satellite era. https://berkeley-earth-wp-offload.storage.googleapis.com/wp-content/uploads/2026/08/12122846/newplot-4-1024x436.png https://berkeleyearth.org/july-2026-temperature-update/ 2026 Outlook With seven months of data in hand, the outlook for the 2026 annual average has shifted decisively upward. Where a month ago a record year looked unlikely, the strengthening El Niño and July’s move above 1.5 °C have flipped the balance: we now calculate roughly a 69% chance that 2026 will become the warmest year on record, up from 12% in the June update. The forecast model, which had been more skeptical of the El Niño’s near-term impact than the ENSO ensembles, has now come into closer agreement with them. The most likely alternative is a 2nd-place finish (about 30%). We currently estimate a near-certain (~99%) chance that the 2026 annual average will exceed 1.5 °C (2.7 °F) above the 1850–1900 average, with a likely annual range of roughly 1.52–1.65 °C. As always, because El Niño’s global impact lags its Pacific peak, an even larger warming influence — and a strong chance of a further record — is expected in 2027. Remarkably, there is likely to be a disconnect in 2026 between record warmth in the ocean and less-than-record warmth on land. We estimate a near certainty (>99%) that El Niño will help to deliver record annual-average warmth for the oceans in 2026. https://berkeley-earth-wp-offload.storage.googleapis.com/wp-content/uploads/2026/08/13130401/Annual_time_series_ocean-1024x576.png https://berkeleyearth.org/july-2026-temperature-update/
August 13, 2026 at 4:34 PM