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James Allan

@jamesallanatmos.bsky.social
681 followers 122 following 341 posts

Long haired atmospheric scientist at the University of Manchester and NCAS. Opinions my own.

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Reposted by James Allan
National Centre for Atmospheric Science @ncas-uk.bsky.social · 29/09/2026
Dr Ioana Colfescu and Dr Akshay Deoras from @ncas-uk.bsky.social were part of a recent expert roundtable about the impacts of El Niño on the UK for the Government Office for Science - providing accessible science advice for policymakers. ncas.ac.uk/ncas-researc... _ #earth-science #SciComm 🧪
ncas.ac.uk
NCAS researchers advise UK Government about El Niño impacts - NCAS
Two NCAS researchers were among experts invited to contribute to a recent Government Office for Science rapid report examining the impacts of El Niño on the UK.
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James Allan @jamesallanatmos.bsky.social · 25/09/2026
Thats... interesting.
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Reposted by James Allan
National Centre for Atmospheric Science @ncas-uk.bsky.social · 15/09/2026
We are looking for a Head of Observations to lead and shape the future of NCAS’s atmospheric measurement and observational science capability. Apply by 12 October 2026: ncas.ac.uk/job-opportun... #earth-science #SciComm 🧪
ncas.ac.uk
Job Opportunity: Head of Observations - NCAS
We are looking for a Head of Observations to lead and shape the future of NCAS’s atmospheric measurement and observational science capability.
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Reposted by James Allan
National Centre for Atmospheric Science @ncas-uk.bsky.social · 06/08/2026
Drought isn't just about a lack of rainfall. As the climate warms, higher temperatures increase evaporation and dry out soils more quickly, meaning droughts can develop faster, become more severe, and affect new regions. ncas.ac.uk/what-does-cl... #earth-science #SciComm 🧪
ncas.ac.uk
What does climate change mean for drought? - NCAS
Climate change is reshaping drought by increasing evaporation and drying soils faster, causing droughts to develop more quickly, become more severe, and affect new regions. Research shows that drought...
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Reposted by James Allan
National Centre for Atmospheric Science @ncas-uk.bsky.social · 03/08/2026
With prolonged hot weather, and wildfires burning across parts of Europe and North America, we explain what these events mean for the climate: #earth-science #SciComm 🧪 ncas.ac.uk/what-do-wild...
ncas.ac.uk
What do wildfires mean for climate change? - NCAS
Wildfires contribute to climate change by releasing greenhouse gases and other pollutants into the atmosphere, and by triggering vegetation changes.
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James Allan @jamesallanatmos.bsky.social · 02/08/2026
Article about the wildfires I get quoted in. observer.co.uk/news/nationa...
observer.co.uk
‘One spark could reignite swathes of the country’: wildfi...
Wildfires are becoming a systemic seasonal threat, posing serious risks to health, homes and the natural world across the UK
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Reposted by James Allan
National Centre for Atmospheric Science @ncas-uk.bsky.social · 29/07/2026
With prolonged hot weather, and wildfires burning across the UK and Europe, what does this mean for air quality in the affected areas or places downwind? ncas.ac.uk/what-do-wild... #earth-science #SciComm 🧪
ncas.ac.uk
What do wildfires mean for air quality? - NCAS
Wildfires can have significant impacts on air quality, as wildfire smoke contains a mixture of hazardous air pollutants.
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Reposted by James Allan
National Centre for Atmospheric Science @ncas-uk.bsky.social · 28/07/2026
Saharan dust pollution in Europe is increasing, with implications for both public health and solar energy. #earth-science #SciComm 🧪 ncas.ac.uk/desert-dust-...
ncas.ac.uk
Desert dust pollution in Europe is rising, with risks for health and solar energy - NCAS
The amount of desert dust from North Africa that is reaching Europe is on the rise, with implications for health and for solar energy.
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James Allan @jamesallanatmos.bsky.social · 29/07/2026
OK, I normally don't like to talk politics on BlueSky, but this does for me highlight an important point. Discussions about what the power grids can and can't handle are a lot more complicated than many people with strong opinions are willing to concede.
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James Allan @jamesallanatmos.bsky.social · 16/07/2026
While the supersite has been doing loads of measurements of the current wildfires, here's another example of its use, helping to quantify the increasing prevalence of desert dust in Europe in this Swiss-lead study. @manchester.ac.uk @ncas-uk.bsky.social www.manchester.ac.uk/about/news/m...
manchester.ac.uk
Manchester air quality data helps reveal growing health and energy risks from Saharan dust
Data collected at The University of Manchester's Air Quality Supersite has contributed to a major international study showing that increasing amounts of desert dust from North Africa are reaching Euro...
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James Allan @jamesallanatmos.bsky.social · 14/07/2026
Update on the fires at Manchester. Some people (like me) might be wondering why the smell has been coming and going, but all the while the sky has been persistently hazy. Our instruments see this as well, here showing PM coming and going. (1/2) whitworth.cas.manchester.ac.uk/live/firs/ae...
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James Allan @jamesallanatmos.bsky.social · 13/07/2026
A satellite picture from yesterday showing how the fires have been influencing Manchester. Note it's not affecting the whole are at the same time, which is why the smell has been coming and going all day. Source: NASA Aqua/MODIS true colour reflectance 12/07/2026, worldview.earthdata.nasa.gov
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Reposted by James Allan
Dr Gary Fuller @drgaryfuller.bsky.social · 13/07/2026
Estimated 2,700 people died early in the UK in the May and June heatwaves. Research led by Clair Barnes @imperial.ac.uk Piece by @dpcarrington.bsky.social. www.theguardian.com/environment/...
theguardian.com
June heatwave killed up to 440 people a day in England and Wales, data suggests
Extreme temperatures in May and June led to about 2,700 lost lives in total with climate crisis adding 3C to 4C
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James Allan @jamesallanatmos.bsky.social · 13/07/2026
Last night's data from the Manchester Air Quality Supersite. We had some serious influence from the fires. (1/2) whitworth.cas.manchester.ac.uk/live/firs/ae...
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James Allan @jamesallanatmos.bsky.social · 12/07/2026
Think we're seeing the emissions from the nearby Dovestone moorland fire at the Manchester supersite. That's pretty nasty! whitworth.cas.manchester.ac.uk/live/firs/ae...
Graphs showing black carbon and nonrefractory particulate matter in Manchester for 12 July 2026
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Reposted by James Allan
Dr Gary Fuller @drgaryfuller.bsky.social · 03/07/2026
"Seventy years after the Clean Air Act, the lessons are clear. Disasters should not be required to trigger action. The Great Smog forced change. But policy should anticipate risk, not respond to tragedy." - Ian Williams on the Clean Air Act. theconversation.com/70-years-on-...
theconversation.com
70 years on from the killer smog: what clean air laws teach us about power, pollution and profit
Economic interests have shaped society’s response to pollution. Now, policy needs to align with the scientific evidence to clean up our air.
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Reposted by James Allan
Met Office - weather and climate @metoffice.gov.uk · 06/07/2026
Yesterday marked 70 years since the UK Clean Air Act 1956 - the first national legislation to tackle air pollution, introduced in response to the devastating Great Smog of London in 1952. The graphic below is courtesy of airqualitystripes.info. 🧵 1/5
Alt text: Graphic shows London’s particulate matter air pollution (PM2.5) concentrations from 1850 to 2022. Concentrations rose overall up until 1960s and then declined rapidly. 

Title says: what do the air quality stripes tell us about London's air quality? Text at bottom of graphic says: for more information visit www.airqualitystripes.info. The graphic highlights the 1952 Great Smog event when air pollution levels were poor. It also mentions the introduction of the UK Clean Air Act. Additionally, it says from the 1960s to 2026 there was increased legislation and a shift to cleaner technologies, leading to improvements in air quality.
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Reposted by James Allan
National Centre for Atmospheric Science @ncas-uk.bsky.social · 03/07/2026
The Data Integration Model for Air Quality underpins the @who.int assessment of global air pollution trends and inequalities. Find out about the latest update from NCAS’s Dr Matthew Thomas: ncas.ac.uk/ncas-air-qua...
Busy street with lots of people walking, riding scooters, and driving cars and trucks.
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James Allan @jamesallanatmos.bsky.social · 30/06/2026
This is a major WHO air quality evaluation exercise that a @manchester.ac.uk/ @ncas-uk.bsky.social colleague of mine (Matthew Thomas) contributed to. (1/2) www.manchester.ac.uk/about/news/u...
manchester.ac.uk
University of Manchester research supports major WHO update on global air pollution
A researcher from The University of Manchester has contributed to a major World Health Organization (WHO) update revealing that global progress on reducing air pollution has slowed, with low- and midd...
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James Allan @jamesallanatmos.bsky.social · 30/06/2026
Some of our recent stove work is now out there, albeit in preprint. I don't normally advertise work until it's passed peer-review, but people have been bugging me about it. Paper is by Zixuan, a PhD student of mine who is graduating soon. (1/4) ar.copernicus.org/preprints/ar...
ar.copernicus.org
Mixing state of Carbonaceous Aerosol Emissions from an Ecodesign Woodstove
Abstract. Residential wood burning (RWB) has become an increasingly significant source of carbonaceous aerosols (CAs) in the UK and worldwide. Black Carbon (BC) and Organic Aerosol (OA) fractions of C...
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James Allan @jamesallanatmos.bsky.social · 25/06/2026
I did an article for NCAS explaining how heatwaves can bad for air quality as well as all the other problems they come with. The short version is with all the chemistry going on and air arriving from the continent, they are especially bad for PM and ozone. 🧵(1/6)
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Reposted by James Allan
National Centre for Atmospheric Science @ncas-uk.bsky.social · 18/06/2026
If you'd like to learn more about air pollution and its links to people's health and global climate, check out this list of our recent and ongoing research: #CleanAirDay @globalactionplan.bsky.social #earth-science #SciComm 🧪
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James Allan @jamesallanatmos.bsky.social · 22/06/2026
This is the bit that should be very concerning: "Météo-France said of the 51 heatwaves recorded in France since 1947, 34 have taken place since 2000 and 26 since 2011."
bbc.co.uk
Schools close as more than half of France under red heat alerts
The health minister warns many citizens "will suffer", with temperatures set to peak on Monday.
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James Allan @jamesallanatmos.bsky.social · 19/06/2026
OK, not atmospheric science, but I did used to teach biogeochemical cycling and had to bone up on the phosphate cycle in the process. This is really kind of interesting.
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James Allan @jamesallanatmos.bsky.social · 19/06/2026
🚨New paper!🚨 Well, it's not that new, but I was waiting for a proper citation before I made a big deal about it. This one's another paper from one of my students, this one looking at trends of metals in particulates over the lockdown period at the Manchester Supersite. doi.org/10.1021/acse...
doi.org
PM10 Contributions from Construction, Biomass Burning, and Nonexhaust Traffic Emissions at the UK Urban Background Site, Based on Online Metals Data
Atmospheric trace metals in particulate matter (PM) pose significant environmental and health risks, making their study crucial for understanding urban air quality. These metals originate from various...
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Reposted by James Allan
National Centre for Atmospheric Science @ncas-uk.bsky.social · 18/06/2026
This #CleanAirDay, research from @ncas-uk.bsky.social highlights how understanding air quality across different settings can help protect health and support better decisions for communities across the UK and beyond. ncas.ac.uk/clean-air-da... #earth-science #SciComm 🧪
ncas.ac.uk
Air quality research links people, places and health - NCAS
This Clean Air Day, NCAS highlights how understanding air quality can help protect people and support better decisions.
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Reposted by James Allan
National Centre for Atmospheric Science @ncas-uk.bsky.social · 10/06/2026
Airports drive growth and connectivity, but their pollution can harm nearby communities. Prof Ally Lewis highlights the health impacts of airports on local residents in a report for POST. Read our summary: ncas.ac.uk/air-pollutio... #earth-science #SciComm 🧪
ncas.ac.uk
Air pollution from airports matters to local communities - NCAS
Professor Alastair Lewis talks about airports, air pollution, health, regulation, and the role of atmospheric scientists.
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James Allan @jamesallanatmos.bsky.social · 02/06/2026
I'd observe the 'Mandela effect' is alive and well in climate change denial, based on a range of demonstrably false statements that are espoused as fact that I can only assume have done the rounds in the echo chambers. How many of these have you heard stated as fact? 🧵 (1/8)
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James Allan @jamesallanatmos.bsky.social · 19/05/2026
I don't know why it took me this long, but today I discovered NOAA's replacement to the ISD database of weather station data (GHCNh), but the files are a bit of a pain to work with. Can anyone recommend any good (ideally API) tools before I reinvent the wheel? www.ncei.noaa.gov/products/glo...
ncei.noaa.gov
Global Historical Climatology Network hourly (GHCNh)
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James Allan @jamesallanatmos.bsky.social · 19/05/2026
A study from Manchester/NCAS that a number of my co-workers were involved in. Showing that even fairly modest exposure to air pollution can have measurable effects on lung and cognitive function.
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Reposted by James Allan
National Centre for Atmospheric Science @ncas-uk.bsky.social · 13/05/2026
Recreational laughing gas in Ho Chi Minh City caused nitrous oxide spikes up to 80× background levels. NCAS measurements revealed hidden urban emissions and can help inform Vietnam’s 2025 ban: ncas.ac.uk/recreational...
ncas.ac.uk
Recreational gas use spurs nitrous oxide emissions in Vietnam - NCAS
Recreational use of laughing gas has been identified as a significant and previously overlooked source of greenhouse gas emissions in Ho Chi Minh City.
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Reposted by James Allan
National Centre for Atmospheric Science @ncas-uk.bsky.social · 12/05/2026
New research shows how unpredictable short-term weather patterns are behind 70% of uncertainty in El Niño and La Niña forecasts. ncas.ac.uk/how-far-ahea...
ncas.ac.uk
How far ahead can we really predict El Niño? - NCAS
El Niño shapes rainfall, drought, food security, and humanitarian planning across the globe. But how far ahead can we predict it?
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Reposted by James Allan
National Centre for Atmospheric Science @ncas-uk.bsky.social · 06/05/2026
Remember that new paint smell? Regulations have cut harmful paint VOC emissions by up to 60% in 15 years. New NCAS data can help update policy, improve emissions inventories, and better protect indoor air quality. Read the story: ncas.ac.uk/paint-rules-...
ncas.ac.uk
Paint rules cut harmful air pollution by 60% in 15 years - NCAS
Changes to the way decorative paints are made have reduced harmful air pollution emissions over the past two decades, according to new research by NCAS.
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James Allan @jamesallanatmos.bsky.social · 06/05/2026
Philosophical question: If an insurgent political party or faction starts threatening to punish people who vote against them, is that a real-world simile of Roko's Basilisk?
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James Allan @jamesallanatmos.bsky.social · 24/04/2026
ukri.org
UK scientists identify bat coronavirus that can enter human cells
BBSRC-funded scientists have identified an East African bat coronavirus that can enter human cells, a discovery that could help prepare for future outbreaks.
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James Allan @jamesallanatmos.bsky.social · 15/04/2026
The presentations from the RSC 'Air Quality in the 21st Century' meetings, including mine on new opportunities for particulate measurement. www.rsc-ecg.com/blog/categor...
rsc-ecg.com
Air Quality in the 21st Century
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James Allan @jamesallanatmos.bsky.social · 14/04/2026
End of an era. 🙁 We did a lot of good science with this and I personally need to give a big thanks to all the staff, operators, engineers and other scientists involved. You'll note my BlueSky profile picture was taken aboard; might leave that up for a bit. ncas.ac.uk/marking-the-...
ncas.ac.uk
Marking the formal closure of the FAAM Airborne Laboratory - NCAS
As we mark the closure of the FAAM Airborne Laboratory, we want to express our gratitude to everyone who has shaped its 22 year journey.
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James Allan @jamesallanatmos.bsky.social · 01/04/2026
ACP is currently recruiting new editors. See below and pass on.
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Reposted by James Allan
Dr Gary Fuller @drgaryfuller.bsky.social · 30/03/2026
It's goodbye from the UK Clean Air Programme. It's been an honour and pleasure to work with you all. A static version of our website will remain for the next five years.
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Reposted by James Allan
The University of Manchester @manchester.ac.uk · 30/03/2026
In response to growing UK wildfire risk, researchers at The University of Manchester brought together ecologists, hydrologists, remote-sensing experts, modellers, fire services and land managers to co-produce new tools to assess fire behaviour. www.youtube.com/watch?v=UYTu... #ShapedTogether
youtube.com
Building a unified response to wildfires
YouTube video by The University of Manchester
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Reposted by James Allan
National Centre for Atmospheric Science @ncas-uk.bsky.social · 25/03/2026
Jesse’s work adapting an ML wildfire model to Scotland shows how cross‑disciplinary research can drive real climate insight. Read more: ncas.ac.uk/from-cogniti...
ncas.ac.uk
Machine learning to predict Scottish wildfires with climate change. - NCAS
Learn about Jesse’s placement work that adapted a machine learning wildfire model for Scotland.
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James Allan @jamesallanatmos.bsky.social · 23/03/2026
If we get another El Nino this year, we're pretty much certain to be entering yet more new and uncharted territory.
bbc.co.uk
UN issues new climate warning as El Niño looms
The Earth's climate is further out of balance than at any time in recorded history, the UN's weather agency says.
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Reposted by James Allan
National Centre for Atmospheric Science @ncas-uk.bsky.social · 17/03/2026
‘When it rains, it pours’ is becoming increasingly accurate as our climate warms. Learn how rising global temperatures affect rainfall in the UK and around the world: ncas.ac.uk/when-it-rain...
ncas.ac.uk
When it rains, it pours with climate change - NCAS
Find out how rising global temperatures are affecting rainfall in the UK and around the world.
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James Allan @jamesallanatmos.bsky.social · 18/03/2026
It's worth pointing out that debates highlighted here apply to not just physics but (as far as I know) all areas of UK publicly-funded research. www.bbc.co.uk/news/article...
bbc.co.uk
Higgs Boson was UK triumph, but British physics faces 'catastrophic' cuts
Britain is preparing to cancel its contribution to one of the Large Hadron Collider's next major upgrades.
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Reposted by James Allan
National Centre for Atmospheric Science @ncas-uk.bsky.social · 13/03/2026
Climate change conversations centre on a few degrees of warming, rising seas, more frequent heatwaves and storms. But what about the high impact low-likelihood scenarios? Read our latest article: ncas.ac.uk/climate-scie...
ncas.ac.uk
What’s the worst that could happen with climate change? - NCAS
NCAS and University of Reading researchers have explored the high impact low-likelihood climate scenarios.
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Reposted by James Allan
Octopus Energy @octopus.energy · 12/03/2026
Turns out net zero is cheaper than a single fossil fuel crisis. 🤷 The sooner we build on clean, home-grown energy, the sooner we stop handing the keys to foreign gas markets. But we also need market reform now - so customers, not just corporations, actually reap the benefits of renewables.
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Reposted by James Allan
National Centre for Atmospheric Science @ncas-uk.bsky.social · 11/03/2026
What does climate change mean for drought in Europe, Africa, and America? We asked NCAS climate scientist Professor Emily Black to explain: ncas.ac.uk/climate-chan...
ncas.ac.uk
Climate change is creating new drought hotspots - NCAS
New research shows that in many parts of the world, soils are drying out - even in places that are projected to get wetter.
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Reposted by James Allan
National Centre for Atmospheric Science @ncas-uk.bsky.social · 05/03/2026
Vibrant sunsets, dirty windows, and increased particulate matter - it must be Saharan dust. Hugo Ricketts explains the what, where, and how of airborne dust in the UK: ncas.ac.uk/why-is-there...
ncas.ac.uk
What does Saharan dust mean for UK weather and air quality? - NCAS
Find out why Saharan dust is drifting over the UK and what it means for our weather and air quality, and how scientists measure it.
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Reposted by James Allan
National Centre for Atmospheric Science @ncas-uk.bsky.social · 02/03/2026
Hello from Leeds 👋 We've just hosted our Introduction to Atmospheric Science course. Thank you to everyone who came to learn and network with our experts and with like-minded peers!
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Reposted by James Allan
National Centre for Atmospheric Science @ncas-uk.bsky.social · 27/02/2026
Following the withdrawal of funding by UKRI-NERC, we can confirm that the FAAM Airborne Laboratory will cease operations at the end of this financial year. Our immediate priority is supporting affected staff and the wider UK atmospheric science community. ncas.ac.uk/closure-of-t...
ncas.ac.uk
Closure of the FAAM Airborne Laboratory - NCAS
The National Centre for Atmospheric Science can confirm that the FAAM Airborne Laboratory will cease operations at the end of this financial year, following the withdrawal of funding by UKRI-NERC.
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