Richard Allan
@rpallanuk.bsky.social
Professor of climate science at the University of Reading: http://www.met.reading.ac.uk/~sgs02rpa/
Environmental science
55%
Geography
19%
Solar radiation modification could reduce global temperatures but is no substitute for reducing emissions, says Royal Society | Royal Society
A Royal Society briefing, published today, considers the potential impacts of solar radiation modification (SRM) if deployed globally, in a scientifically informed way, across both hemispheres and for...
royalsociety.org
Only through carefully coordinated international agreement and as an addition to mitigation of greenhouse gas emissions, assuming the latter was deemed inadequate: royalsociety.org/news/2025/11...
You could email the author? Couldn’t find an open access version
Global #climate hazards @ukhsa.bsky.social 21 Nov 2025:
⛈️ storms hit Chile/Argentina, Portugal & UK
🌧️ #floods & landslides affect Italy/Slovenia, France, Republic of the Congo, Thailand, Vietnam, Indonesia, USA
www.met.reading.ac.uk/~sgs02rpa/ex...
⛈️ storms hit Chile/Argentina, Portugal & UK
🌧️ #floods & landslides affect Italy/Slovenia, France, Republic of the Congo, Thailand, Vietnam, Indonesia, USA
www.met.reading.ac.uk/~sgs02rpa/ex...
Future extreme precipitation amplified by intensified mesoscale moisture convergence - Nature Geoscience
Extreme daily precipitation events over land could increase by about 41% by 2100 under a high-emissions scenario with an increase in mesoscale moisture convergence, according to an ensemble of climate...
doi.org
Daily extreme precipitation over land increases ~40% by 2100 in high resolution single model ensemble under high greenhouse gas emissions scenario with over half driven by enhanced mesoscale convergence that's underestimated by factor of 3 in low-resolution simulations:
doi.org/10.1038/s415...
doi.org/10.1038/s415...
How China cleaned up its air pollution – and what that meant for the climate
Atmospheric scientist Laura Wilcox talks to The Conversation Weekly about the measures China took to improve its air pollution – and the unintended consequences for the climate.
theconversation.com
As well as protecting health, China’s efforts at cleaning up aerosol particle pollution has restored sunlight to Pacific Ocean, once robbed by the haze that was artificially brightening clouds, which unfortunately adds to warming - @uk.theconversation.com podcast:
theconversation.com/how-china-cl...
theconversation.com/how-china-cl...
No. But at the top of our new large water tank is the computer that assesses various in/out temperatures & weather conditions to fine tune things. There’s a survey before install to assess heat loss from each room so they know if to install bigger radiators and they’d answer these kinds of questions
Not noticed any issues? Our air to water heat pump is designed to work effectively and without issue down to -10C snd below and has inbuilt frost settings so shouldn’t be an issue in the UK, though regularly checking for debris or snow build up is also recommended.
The fast-fix for global warming that the UN climate summit can’t ignore
Removing so-called ‘short-lived climate pollutants’ from the atmosphere could reduce global warming – fast.
theconversation.com
As well as rapidly cutting CO2 emissions, tackling short-lived warming agents like methane & surface ozone pollution boosts action to limit #climate warming + counteracts warming from cleaning our air of harmful aerosol particles that have robbed us of sunlight: theconversation.com/the-fast-fix...
Our heat pump doing it’s job taking in cold air, extracting energy to heat our house and exhaling even colder air that has kept the dusting of snow happy in its artificial frost hollow long after it had melted away elsewhere!
October 2025 quite dry in UK apart from N Ireland/west Scotland/Kent with below average river flows in east & depleted groundwater/reservoirs but wetter soils with low groundwater-fed river flows expected to continue despite early November deluges - @ceh.org summary:
nrfa.ceh.ac.uk/sites/defaul...
nrfa.ceh.ac.uk/sites/defaul...
Global #climate hazards @ukhsa.bsky.social 14 Nov 2025:
🌀 tropical cyclones affect Philippines, Taiwan, Japan
⛈️ storms hit Brazil, Portugal, Spain, Burundi
🌧️ landslides #floods DR Congo, Pakistan, Thailand, Indonesia
🏭 smog Delhi/India
🥀 #drought Iran, Somalia
www.met.reading.ac.uk/~sgs02rpa/ex...
🌀 tropical cyclones affect Philippines, Taiwan, Japan
⛈️ storms hit Brazil, Portugal, Spain, Burundi
🌧️ landslides #floods DR Congo, Pakistan, Thailand, Indonesia
🏭 smog Delhi/India
🥀 #drought Iran, Somalia
www.met.reading.ac.uk/~sgs02rpa/ex...
New assessment reported @nature.com finds weaker land carbon sink but stronger ocean sink than previously thought with #climate change and deforestation stifling how much carbon the continents can take up, leaving more behind to raise atmospheric CO2 levels:
doi.org/10.1038/s415...
doi.org/10.1038/s415...
Reposted by Richard P. Allan
In glorious Autumn sunshine we cleared Amersham Rd & southern offshoots, collecting 8 large/14 small bags of litter, finding wrappers so old they could be archaeological! See future rubbish events on the rubbish website:
www.met.reading.ac.uk/~sgs02rpa/KCT/
www.met.reading.ac.uk/~sgs02rpa/KCT/
Global #climate hazards @ukhsa.bsky.social 7th Nov 25:
🌀 Tropical Cyclones affect Caribbean and South East Asia
🌧️ Landslides & floods hit Uganda/Kenya
⛈️ Storms strike Brazil
⚪ Giant Hail in northeast Australia
🏔️ Avalanches in Italy & Nepal
www.met.reading.ac.uk/~sgs02rpa/ex...
🌀 Tropical Cyclones affect Caribbean and South East Asia
🌧️ Landslides & floods hit Uganda/Kenya
⛈️ Storms strike Brazil
⚪ Giant Hail in northeast Australia
🏔️ Avalanches in Italy & Nepal
www.met.reading.ac.uk/~sgs02rpa/ex...
New @royalsociety.org report assesses geoengineering #climate to mask human caused warming by artificially injecting aerosol haze to reflect sunlight, arguing it can only be used as a well coordinated compliment to deficient mitigation of greenhouse gas emissions:
royalsociety.org/news-resourc...
royalsociety.org/news-resourc...
Aviation passenger carbon footprint calculator with comprehensive emissions, life cycle coverage, and historical adjustment - Communications Earth & Environment
A new aviation carbon footprint tool improves accuracy and transparency by incorporating nitrogen oxide, water vapor, and contrail impacts, life cycle emissions from aircraft and airports, and adjusti...
www.nature.com
You could take a look at the underlying research article I shared & references within: www.nature.com/articles/s43...
Contrails, NOx + water vapour all trap outgoing longwave radiation for example, though the precise calculation depends on time scale since CO2 stays in the atmosphere much longer
Contrails, NOx + water vapour all trap outgoing longwave radiation for example, though the precise calculation depends on time scale since CO2 stays in the atmosphere much longer
Reposted by Richard P. Allan
When the Lakes Remember: Unravelling the Sudd Floods of 2022
By Douglas Mulangwa – d.mulangwa@pgr.reading.ac.uk Between 2019 and 2024, East Africa experienced one of the most persistent high-water periods in modern history: a flood that simply would no…
socialmetwork.blog
New insights into slow progression of #flooding from Lakes Victoria, Kyoga & Albert + expansion of Sudd Wetlands in East Africa 2019-2024 enable better forecasting – new blog by Douglas Mulangwa: socialmetwork.blog/2025/10/28/w...
Your flight emissions are way higher than carbon calculators suggest
Existing tools that work out the carbon footprint of flights greatly underestimate their warming impact, say the makers of a new calculator
www.newscientist.com
Impact of flights on global warming severely underestimated by many carbon calculators & offset schemes that don’t properly account for taxiing, sub-optimal routing or non-CO2 climate effects which are larger component:
www.newscientist.com/article/2502...
Research paper:
doi.org/10.1038/s432...
www.newscientist.com/article/2502...
Research paper:
doi.org/10.1038/s432...
![A building stands amid torn tree branches in an affected area, after Hurricane Melissa made landfall in Black River, Jamaica, on October 30, 2025 [Octavio Jones/REUTERS]](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:u6g7lrvd3rqarb36jqeekqb3/bafkreigghpatx627u4o6vfqai346rjricb7aw54x7tf54hxqb3ugt6dlma@jpeg)
Global #climate hazards @ukhsa.bsky.social 31 Oct 2025:
🌀 Hurricane MELISSA hits Caribbean
🌀 Cyclone MONTHA affects India
⛈️ storms across USA
🌧️ #floods over Colombia, Indonesia, Vietnam, Spain, South Sudan
🏔️landslides in Uganda & Papua New Guinea
www.met.reading.ac.uk/~sgs02rpa/ex...
🌀 Hurricane MELISSA hits Caribbean
🌀 Cyclone MONTHA affects India
⛈️ storms across USA
🌧️ #floods over Colombia, Indonesia, Vietnam, Spain, South Sudan
🏔️landslides in Uganda & Papua New Guinea
www.met.reading.ac.uk/~sgs02rpa/ex...
Reposted by Juan Cole
Keeping the planet below the 2°C Paris #climate limit will ensure almost all Antarctic ice shelves remain, while most will eventually melt as after warming passes 4.5°C with the potential for 10 metres of sea level rise - based on @nature.com study:
doi.org/10.1038/s415...
doi.org/10.1038/s415...
10 New Insights in Climate Science
Essential research findings to support decision-making in a critical decade.
10insightsclimate.science
Rapid warming from rising greenhouse gases + declining aerosol particle pollution are worsening extremes, depleting groundwater & limiting carbon uptake by land - #10ClimateInsights:
10insightsclimate.science
10insightsclimate.science
Reposted by Richard P. Allan
Hurricane Melissa is a warning – why violent storms are increasingly catching the world off guard
In a single day, Melissa exploded from a moderate storm into a major hurricane with 170mph winds.
theconversation.com
Expert comment about more destructive tropical cyclones as the world warms:
theconversation.com/hurricane-me...
theconversation.com/hurricane-me...
Reposted by Richard P. Allan
Hurricane Melissa is now the strongest storm on the planet this year | CNN
Melissa is about to deliver Jamaica its most devastating blow from a hurricane.
www.cnn.com
Mandatory evacuation orders have been issued for coastal areas of Jamaica before landfall by Melissa, currently the strongest hurricane of 2025.
Follow live updates: https://cnn.it/3WYcbAd
Follow live updates: https://cnn.it/3WYcbAd
Richard Allan
@rpallanuk.bsky.social
· Oct 24
Global #climate hazards @ukhsa.bsky.social:
🌀 tropical cyclone MELISSA in Caribbean
💨 storm Amy France/UK
⛈️ storms Brazil, Colombia, New Zealand, Philippines
🏭 smog N India
🌫️ freezing fog Finland
🌧️ #floods Indonesia, Mexico
🥀 #heatwave & #drought Mali & Zambia
www.met.reading.ac.uk/~sgs02rpa/ex...
🌀 tropical cyclone MELISSA in Caribbean
💨 storm Amy France/UK
⛈️ storms Brazil, Colombia, New Zealand, Philippines
🏭 smog N India
🌫️ freezing fog Finland
🌧️ #floods Indonesia, Mexico
🥀 #heatwave & #drought Mali & Zambia
www.met.reading.ac.uk/~sgs02rpa/ex...
Richard Allan
@rpallanuk.bsky.social
· Oct 21
How a more flexible energy grid can cope better with swings in Britain’s weather
New report shows how seemingly benign weather conditions can have a big impact on British electricity production – and prices.
theconversation.com
Forecasting renewable energy droughts (and floods) is increasingly crucial in developing a flexible grid and stable electricity prices:
theconversation.com/how-a-more-f...
theconversation.com/how-a-more-f...
Richard Allan
@rpallanuk.bsky.social
· Oct 17
Landmark global shipping deal abandoned under US threats
President Trump intervened in the talks calling the deal a "green scam".
www.bbc.com
Landmark global shipping deal to reduce emissions suspended as Trump spouts usual nonsense www.bbc.com/news/article...
Richard Allan
@rpallanuk.bsky.social
· Oct 17
Latest @ukceh.bsky.social UK hydrological summary for September 2025 - some respite from dry conditions with high river flow in northwest but low in parts of the east and depleted groundwater across many regions:
nrfa.ceh.ac.uk/sites/defaul...
nrfa.ceh.ac.uk/sites/defaul...
Richard Allan
@rpallanuk.bsky.social
· Oct 17
Global #climate hazards @ukhsa.bsky.social 17 Oct 2025:
🌀 tropical storm JERRY affects Guadeloupe, Martinique
🌧️ #floods across DR Congo, South Sudan, Tunisia, Nigeria, Guatemala, Venezuela, Mexico, USA
⛈️ storms hit Malaysia
www.met.reading.ac.uk/~sgs02rpa/ex...
🌀 tropical storm JERRY affects Guadeloupe, Martinique
🌧️ #floods across DR Congo, South Sudan, Tunisia, Nigeria, Guatemala, Venezuela, Mexico, USA
⛈️ storms hit Malaysia
www.met.reading.ac.uk/~sgs02rpa/ex...
Richard Allan
@rpallanuk.bsky.social
· Oct 16
🚨 Launched: State of Wildfires Report 2024-25
The Americas felt the harsh reality of what it means to live on a more fire-prone planet, with extreme #wildfire episodes made 2-3 times more likely by #climate change.
🔥 Full details via our brand new website: stateofwildfires.com/latest-report/
The Americas felt the harsh reality of what it means to live on a more fire-prone planet, with extreme #wildfire episodes made 2-3 times more likely by #climate change.
🔥 Full details via our brand new website: stateofwildfires.com/latest-report/
Reposted by Peter Thorne
Richard Allan
@rpallanuk.bsky.social
· Oct 16
Three ways to make the UK’s food system more resilient – according to new report by 150 experts
Modelling shows that we will need to change not just how we farm, but what farming produces and what we eat.
theconversation.com
Moving away from livestock towards more sustainable agricultural production & practices along with dietary changes can increasing the resilience & self sufficiency of UK food systems as well as reducing our harmful greenhouse gas emissions: theconversation.com/three-ways-t...