Alfie Mayhew
@amayhew.bsky.social
Postdoctoral researcher studying the impacts of the atmospheric chemistry of BVOCs on air quality and climate 🌍
Reposted by Alfie Mayhew
Meet the world’s largest heat pumps.
From the Rhine to cities in Denmark and Finland, vast heat pump systems are being built to heat thousands of homes. Using rivers, seawater and wastewater, the UK is also tapping heat from disused flooded mines for new heat networks. www.bbc.co.uk/news/article...
From the Rhine to cities in Denmark and Finland, vast heat pump systems are being built to heat thousands of homes. Using rivers, seawater and wastewater, the UK is also tapping heat from disused flooded mines for new heat networks. www.bbc.co.uk/news/article...
The giant heat pumps designed to warm whole districts
Across Europe huge heat pumps are being installed that can heat tens of thousands of homes.
www.bbc.co.uk
December 16, 2025 at 11:49 AM
Meet the world’s largest heat pumps.
From the Rhine to cities in Denmark and Finland, vast heat pump systems are being built to heat thousands of homes. Using rivers, seawater and wastewater, the UK is also tapping heat from disused flooded mines for new heat networks. www.bbc.co.uk/news/article...
From the Rhine to cities in Denmark and Finland, vast heat pump systems are being built to heat thousands of homes. Using rivers, seawater and wastewater, the UK is also tapping heat from disused flooded mines for new heat networks. www.bbc.co.uk/news/article...
Reposted by Alfie Mayhew
How could pollutants from aircraft change by burning sustainable aviation fuel? New research marks a major step forward in understanding how different aviation fuels change the impact of flying on air quality and the climate.
Read more:
ncas.ac.uk/scientists-p...
Read more:
ncas.ac.uk/scientists-p...
Scientists probe how sustainable aviation fuel affects air quality and climate - NCAS
Scientists study air pollutant emissions from an aircraft engine running on sustainable aviation fuel.
ncas.ac.uk
December 9, 2025 at 11:26 AM
How could pollutants from aircraft change by burning sustainable aviation fuel? New research marks a major step forward in understanding how different aviation fuels change the impact of flying on air quality and the climate.
Read more:
ncas.ac.uk/scientists-p...
Read more:
ncas.ac.uk/scientists-p...
Reposted by Alfie Mayhew
🚨 BREAKING: French President Emmanuel Macron warned the US could be about to “betray” Ukraine, according to a leaked transcript of a call between European leaders strategizing about how to protect Kyiv.
Read the story: politi.co/4iFVe7R
Read the story: politi.co/4iFVe7R
December 4, 2025 at 11:36 AM
🚨 BREAKING: French President Emmanuel Macron warned the US could be about to “betray” Ukraine, according to a leaked transcript of a call between European leaders strategizing about how to protect Kyiv.
Read the story: politi.co/4iFVe7R
Read the story: politi.co/4iFVe7R
Reposted by Alfie Mayhew
I wish more people were aware of this. Considering the scale of the threat, the media's near-silence is both remarkable and culpable.
www.theguardian.com/commentisfre...
www.theguardian.com/commentisfre...
Hello, foreign oligarchs and corporations! Please come and sue the UK for billions | George Monbiot
The case of a planned Cumbrian coalmine shows how governments around the world are being threatened by litigation in shadowy offshore courts, says Guardian columnist George Monbiot
www.theguardian.com
December 2, 2025 at 9:53 AM
I wish more people were aware of this. Considering the scale of the threat, the media's near-silence is both remarkable and culpable.
www.theguardian.com/commentisfre...
www.theguardian.com/commentisfre...
Reposted by Alfie Mayhew
COP30 in Belém was billed as 'the COP of implementation'; a moment to turn promises into action.
Priestley member and COP30 delegate Jyoti Narsude shares her thoughts on the reality.
climate.leeds.ac.uk/does-cop-imp...
Priestley member and COP30 delegate Jyoti Narsude shares her thoughts on the reality.
climate.leeds.ac.uk/does-cop-imp...
Reflecting on COP30: Did the ‘Implementation COP’ Deliver? - Priestley Centre for Climate Futures
COP30 in Belém was billed as the COP of implementation; a moment to turn promises into action. Expectations were huge, including stronger commitments on fossil fuel phase-out, forest protection, and c...
climate.leeds.ac.uk
December 2, 2025 at 11:33 AM
COP30 in Belém was billed as 'the COP of implementation'; a moment to turn promises into action.
Priestley member and COP30 delegate Jyoti Narsude shares her thoughts on the reality.
climate.leeds.ac.uk/does-cop-imp...
Priestley member and COP30 delegate Jyoti Narsude shares her thoughts on the reality.
climate.leeds.ac.uk/does-cop-imp...
Reposted by Alfie Mayhew
Excited to announce my group's latest paper by @amayhew.bsky.social on dimers/accretion products has been published in ACP. For the measurement folks: "Moving forward, it is clear that extensive measurements of accretion products are urgently needed." acp.copernicus.org/articles/25/...
The global importance of gas-phase peroxy radical accretion reactions for secondary organic aerosol loading
Abstract. Secondary organic aerosol (SOA) is an important class of atmospheric species with influences on air quality and climate. One understudied SOA formation pathway is gas-phase peroxy radical (R...
acp.copernicus.org
December 1, 2025 at 8:12 PM
Excited to announce my group's latest paper by @amayhew.bsky.social on dimers/accretion products has been published in ACP. For the measurement folks: "Moving forward, it is clear that extensive measurements of accretion products are urgently needed." acp.copernicus.org/articles/25/...
Reposted by Alfie Mayhew
New research, led by @york.ac.uk, found a significant proportion of ships breaching #airpollution limits.
"..some trigonometry and very skilled flying, we were able to intercept 130 ship plumes" - Dominika Pasternak
Piece by me.
www.theguardian.com/environment/...
"..some trigonometry and very skilled flying, we were able to intercept 130 ship plumes" - Dominika Pasternak
Piece by me.
www.theguardian.com/environment/...
Many ships found breaching pollution limits despite tighter controls
Researchers using aircraft to sample exhaust plumes say infringements persist – even in stricter zones
www.theguardian.com
November 28, 2025 at 8:58 AM
New research, led by @york.ac.uk, found a significant proportion of ships breaching #airpollution limits.
"..some trigonometry and very skilled flying, we were able to intercept 130 ship plumes" - Dominika Pasternak
Piece by me.
www.theguardian.com/environment/...
"..some trigonometry and very skilled flying, we were able to intercept 130 ship plumes" - Dominika Pasternak
Piece by me.
www.theguardian.com/environment/...
The work from my time at @utah.edu with @wilkescenter.bsky.social has just been published in ACP as a highlight paper.
RO2 accretion products could comprise a substantial fraction of PM2.5, and the chemical structure may be different than previously assumed! 🤔
doi.org/10.5194/acp-...
RO2 accretion products could comprise a substantial fraction of PM2.5, and the chemical structure may be different than previously assumed! 🤔
doi.org/10.5194/acp-...
The global importance of gas-phase peroxy radical accretion reactions for secondary organic aerosol loading
Abstract. Secondary organic aerosol (SOA) is an important class of atmospheric species with influences on air quality and climate. One understudied SOA formation pathway is gas-phase peroxy radical (R...
doi.org
November 28, 2025 at 9:21 AM
The work from my time at @utah.edu with @wilkescenter.bsky.social has just been published in ACP as a highlight paper.
RO2 accretion products could comprise a substantial fraction of PM2.5, and the chemical structure may be different than previously assumed! 🤔
doi.org/10.5194/acp-...
RO2 accretion products could comprise a substantial fraction of PM2.5, and the chemical structure may be different than previously assumed! 🤔
doi.org/10.5194/acp-...
Reposted by Alfie Mayhew
Industrialized economies are increasingly turning their backs on aid and diplomacy to build up their armies.
But analysts fear that hostile and unreliable states like Russia, China and Turkey will step in to fill the gap.
🔗 politi.co/4i4fUWR
But analysts fear that hostile and unreliable states like Russia, China and Turkey will step in to fill the gap.
🔗 politi.co/4i4fUWR
November 17, 2025 at 11:14 AM
Industrialized economies are increasingly turning their backs on aid and diplomacy to build up their armies.
But analysts fear that hostile and unreliable states like Russia, China and Turkey will step in to fill the gap.
🔗 politi.co/4i4fUWR
But analysts fear that hostile and unreliable states like Russia, China and Turkey will step in to fill the gap.
🔗 politi.co/4i4fUWR
Reposted by Alfie Mayhew
New from me: I spoke to two scientists who originally helped spread the use of carbon capture. They now say it's being misused. Here's why (gift link):
The Scientists Who Popularized Carbon Capture Have a Warning About It
Many countries are relying on it to meet their climate goals, but it might hurt more than help, they say.
www.bloomberg.com
November 12, 2025 at 11:23 AM
New from me: I spoke to two scientists who originally helped spread the use of carbon capture. They now say it's being misused. Here's why (gift link):
Check out my latest short article with Chembites summarising a recent paper demonstrating the use of additional chemical metrics in assessing the health impacts of exposure to air pollution 😶🌫️
chembites.org/2025/10/31/b...
chembites.org/2025/10/31/b...
Beyond Particle Mass: Linking Chemical Composition to Air Quality Health Effects – Chembites
chembites.org
October 31, 2025 at 12:37 PM
Check out my latest short article with Chembites summarising a recent paper demonstrating the use of additional chemical metrics in assessing the health impacts of exposure to air pollution 😶🌫️
chembites.org/2025/10/31/b...
chembites.org/2025/10/31/b...
Reposted by Alfie Mayhew
In any discussion of food and farming, unless your solution can be scaled to feed 8 billion people, you shouldn't be taken seriously. Unfortunately, cottagecore fantasies that would feed only the richest consumers, leaving billions to starve, are all too common.
www.monbiot.com/2023/10/04/t...
www.monbiot.com/2023/10/04/t...
The Cruel Fantasies of Well-Fed People
The astonishing story of how a movement’s quest for rural simplicity drifted into a formula for mass death
www.monbiot.com
October 14, 2025 at 10:21 AM
In any discussion of food and farming, unless your solution can be scaled to feed 8 billion people, you shouldn't be taken seriously. Unfortunately, cottagecore fantasies that would feed only the richest consumers, leaving billions to starve, are all too common.
www.monbiot.com/2023/10/04/t...
www.monbiot.com/2023/10/04/t...
Reposted by Alfie Mayhew
"When colleagues & I interviewed people (...) about the act a few years ago, they emphasised the predictable process, the clear rules on accountability & the evidence-based discourse it has enabled." @samfankhauser.bsky.social @theconversation.com theconversation.com/tory-plan-to...
Tory plan to scrap net zero target puts UK climate leadership at risk
The country has enjoyed a unique period of consensus and stability under the Climate Change Act, which the Tories now want to scrap.
theconversation.com
October 8, 2025 at 8:13 AM
"When colleagues & I interviewed people (...) about the act a few years ago, they emphasised the predictable process, the clear rules on accountability & the evidence-based discourse it has enabled." @samfankhauser.bsky.social @theconversation.com theconversation.com/tory-plan-to...
Reposted by Alfie Mayhew
Perhaps paradoxically for those not familiar with the science, the Atlantic 'cold blob' enhances summer heat and drought in Europe by enhancing south-westerly flow, which will impact agriculture, forestry, tourism, fire risk and more. Slide from a recent talk I gave in Madrid.
June 11, 2025 at 7:03 PM
Perhaps paradoxically for those not familiar with the science, the Atlantic 'cold blob' enhances summer heat and drought in Europe by enhancing south-westerly flow, which will impact agriculture, forestry, tourism, fire risk and more. Slide from a recent talk I gave in Madrid.
Reposted by Alfie Mayhew
Trump’s new ‘gold standard’ rule will destroy American science as we know it" by Colette Delawalla (@cdelawalla.bsky.social), Victor Ambros, Carl Bergstrom, Carol Greider, Michael Mann and Brian Nosek for @theguardian.com: www.theguardian.com/commentisfre...
Trump’s new ‘gold standard’ rule will destroy American science as we know it | Colette Delawalla
The new executive order allows political appointees to undermine research they oppose, paving the way to state-controlled science
www.theguardian.com
May 29, 2025 at 1:03 PM
Trump’s new ‘gold standard’ rule will destroy American science as we know it" by Colette Delawalla (@cdelawalla.bsky.social), Victor Ambros, Carl Bergstrom, Carol Greider, Michael Mann and Brian Nosek for @theguardian.com: www.theguardian.com/commentisfre...
Reposted by Alfie Mayhew
There is a new study out in Nature about the Atlantic overturning circulation. I will be curious to see the media reporting on this. If you wonder why, read my blog article on it! 🌊
www.realclimate.org/index.php/ar...
www.realclimate.org/index.php/ar...
RealClimate: How will media report on this new AMOC study?
RealClimate: I’ve been getting a lot of media queries about a new paper on the AMOC, which has just been published. In my view this large media interest is perhaps due to confusing messages conveyed i...
www.realclimate.org
February 26, 2025 at 4:07 PM
There is a new study out in Nature about the Atlantic overturning circulation. I will be curious to see the media reporting on this. If you wonder why, read my blog article on it! 🌊
www.realclimate.org/index.php/ar...
www.realclimate.org/index.php/ar...
My latest post for Chembites is out now! A summary of a recent research paper investigating a potentially important climate feedback process! 🌍
chembites.org/2025/02/21/t...
chembites.org/2025/02/21/t...
Greenhouse Gasses Bubbling Up From Deep Below Arctic Lakes – Chembites
chembites.org
February 21, 2025 at 9:01 PM
My latest post for Chembites is out now! A summary of a recent research paper investigating a potentially important climate feedback process! 🌍
chembites.org/2025/02/21/t...
chembites.org/2025/02/21/t...
Reposted by Alfie Mayhew
New from me: The UK's climate plan for the period to 2035 is the only one that gets anywhere near the ambition required to limit warming to below 2C, observers say. Will anyone else follow suit? Story with @akshatrathi.bsky.social & @zhirji.bsky.social. Gift link:
Only One Big Economy Is Aiming for Paris Agreement’s 1.5C Goal
The UK is currently an outlier with an increasingly ambitious climate plan after more than 170 countries missed a UN deadline.
www.bloomberg.com
February 11, 2025 at 10:19 AM
New from me: The UK's climate plan for the period to 2035 is the only one that gets anywhere near the ambition required to limit warming to below 2C, observers say. Will anyone else follow suit? Story with @akshatrathi.bsky.social & @zhirji.bsky.social. Gift link:
Reposted by Alfie Mayhew
This, from @jamellebouie.net, is the best summary I've seen of where we are right now.
"To describe the current situation in the executive branch as merely a constitutional crisis is to understate the significance of what we’re experiencing."
Gift link:
www.nytimes.com/2025/02/05/o...
"To describe the current situation in the executive branch as merely a constitutional crisis is to understate the significance of what we’re experiencing."
Gift link:
www.nytimes.com/2025/02/05/o...
Opinion | There Is No Going Back (Gift Article)
The president’s opponents, whoever they are, cannot expect a return to the Constitution as it was.
www.nytimes.com
February 5, 2025 at 4:57 PM
This, from @jamellebouie.net, is the best summary I've seen of where we are right now.
"To describe the current situation in the executive branch as merely a constitutional crisis is to understate the significance of what we’re experiencing."
Gift link:
www.nytimes.com/2025/02/05/o...
"To describe the current situation in the executive branch as merely a constitutional crisis is to understate the significance of what we’re experiencing."
Gift link:
www.nytimes.com/2025/02/05/o...
Reposted by Alfie Mayhew
“They apparently just sort of walked past security and said: ‘Get out of my way,’ and they’re looking for access for the IT systems, as they have in other agencies,” said a former Noaa official. “They will have access to the entire computer system, a lot of which is confidential information.”
Doge staffers enter Noaa headquarters and incite reports of cuts and threats
Members reportedly sought access to IT systems at agency that Project 2025 has called ‘harmful to US prosperity’
www.theguardian.com
February 5, 2025 at 12:10 PM
“They apparently just sort of walked past security and said: ‘Get out of my way,’ and they’re looking for access for the IT systems, as they have in other agencies,” said a former Noaa official. “They will have access to the entire computer system, a lot of which is confidential information.”
Reposted by Alfie Mayhew
I've deleted my post about NOAA's Global Monitoring Lab being offline.
Feedback I've gotten indicates a power outage is affecting NOAA's Boulder, CO facilities related to maintenance work.
Hence, this (presumably temporary) outage seems unrelated to recent government actions.
Feedback I've gotten indicates a power outage is affecting NOAA's Boulder, CO facilities related to maintenance work.
Hence, this (presumably temporary) outage seems unrelated to recent government actions.
February 5, 2025 at 3:24 PM
I've deleted my post about NOAA's Global Monitoring Lab being offline.
Feedback I've gotten indicates a power outage is affecting NOAA's Boulder, CO facilities related to maintenance work.
Hence, this (presumably temporary) outage seems unrelated to recent government actions.
Feedback I've gotten indicates a power outage is affecting NOAA's Boulder, CO facilities related to maintenance work.
Hence, this (presumably temporary) outage seems unrelated to recent government actions.
Reposted by Alfie Mayhew
“A recent surge in global warming is not detectable yet” www.nature.com/articles/s43...
A recent surge in global warming is not detectable yet - Communications Earth & Environment
Despite 2023’s record temperatures, there is no significant warming surge beyond the 1970s, and an increase of at least 55% across all datasets is required for a detectable warming surge at the presen...
www.nature.com
February 4, 2025 at 2:41 PM
“A recent surge in global warming is not detectable yet” www.nature.com/articles/s43...