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%
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
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...
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...
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...
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...
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...
🚨 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
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...
🚨 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/
Richard Allan
@rpallanuk.bsky.social
· Oct 10
Latest global extremes:
🌀Tropical cyclone MATMO Philippines, China, Vietnam
🌀 Typhoon Halong near Japan
🌧️flooding Nepal/N India/Pakistan, Thailand, Georgia, Bulgaria, Chad
⛈️storms hit Bangladesh, Northern Europe
❄️avalanche Slovenia
www.met.reading.ac.uk/~sgs02rpa/ex...
🌀Tropical cyclone MATMO Philippines, China, Vietnam
🌀 Typhoon Halong near Japan
🌧️flooding Nepal/N India/Pakistan, Thailand, Georgia, Bulgaria, Chad
⛈️storms hit Bangladesh, Northern Europe
❄️avalanche Slovenia
www.met.reading.ac.uk/~sgs02rpa/ex...
Richard Allan
@rpallanuk.bsky.social
· Oct 3
Global #climate hazards @ukhsa.bsky.social 3rd Oct 2025:
🌀 tropical cyclones IMELDA/HUMBERTO affect USA/Bermuda + BUALOI hits Laos, Philippines, Thailand, Vietnam
🌧️ #floods in Algeria, Cambodia, Haiti, Italy, Spain, Nigeria, Ukrain
www.met.reading.ac.uk/~sgs02rpa/ex...
🌀 tropical cyclones IMELDA/HUMBERTO affect USA/Bermuda + BUALOI hits Laos, Philippines, Thailand, Vietnam
🌧️ #floods in Algeria, Cambodia, Haiti, Italy, Spain, Nigeria, Ukrain
www.met.reading.ac.uk/~sgs02rpa/ex...
Richard Allan
@rpallanuk.bsky.social
· Sep 26
![BBC reporter braving RAGASA winds with spray from massive wave shown [source: BBC]](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:u6g7lrvd3rqarb36jqeekqb3/bafkreihkdyr353beauyk666klx7etchyxbbj634ddmr6xldmhb3s4lipxe@jpeg)
Global #climate hazards @ukhsa.bsky.social 26 Sep 2025:
🌀 tropical cyclones RAGASA & BUALOI hit south-east Asia
🌧️ #flooding & landslides affect France, Haiti, India, Indonesia, Italy, Nigeria, Pakistan, Spain, Taiwan, Thailand, USA
🔥 #wildfire in Portugal
www.met.reading.ac.uk/~sgs02rpa/ex...
🌀 tropical cyclones RAGASA & BUALOI hit south-east Asia
🌧️ #flooding & landslides affect France, Haiti, India, Indonesia, Italy, Nigeria, Pakistan, Spain, Taiwan, Thailand, USA
🔥 #wildfire in Portugal
www.met.reading.ac.uk/~sgs02rpa/ex...
Richard Allan
@rpallanuk.bsky.social
· Sep 26
Higher CO2 levels have been increasing tree size in the Amazon, potentially increasing carbon uptake but this may be short lived as larger trees can be more susceptible to climate change intensified heat & drought:
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Reposted by Richard P. Allan
Severe storm forecasts set to improve with new satellite - University of Reading
www.reading.ac.uk
The @esa.int WIVERN satellite mission to transform forecasts of hurricanes, thunderstorms & heavy rainfall makes our Prof Anthony Illingworth the 1st scientist with 2 Earth Explorer missions adopted, following launch of EarthCARE satellite in 2024:
www.reading.ac.uk/news/2025/Re...
www.reading.ac.uk/news/2025/Re...
Richard Allan
@rpallanuk.bsky.social
· Sep 25
The Ganges River is drying faster than ever – here’s what it means for the region and the world
Climate change and overuse are creating a crisis for south Asia’s most important river.
theconversation.com
Climate change, relentless extraction and damming are pushing the mighty Ganges towards collapse, with consequences for food, water and livelihoods across the region:
theconversation.com/the-ganges-r...
theconversation.com/the-ganges-r...
Richard Allan
@rpallanuk.bsky.social
· Sep 21
Global #climate hazards @ukhsa.bsky.social 21 Sep 2025:
🌀 Tropical cyclones MITAG & RAGAS affect Philippines, China
💨 storm not-Amy hit UK & France
🌧️ #floods across Gambia, India, Malaysia, Niger, Pakistan, Philippines, South Sudan, USA, Vietnam, Yemen
www.met.reading.ac.uk/~sgs02rpa/ex...
🌀 Tropical cyclones MITAG & RAGAS affect Philippines, China
💨 storm not-Amy hit UK & France
🌧️ #floods across Gambia, India, Malaysia, Niger, Pakistan, Philippines, South Sudan, USA, Vietnam, Yemen
www.met.reading.ac.uk/~sgs02rpa/ex...
Richard Allan
@rpallanuk.bsky.social
· Sep 15
Dry, warm conditions persisted over UK in August 2025 with low river flows, groundwater, reservoir levels & soil moisture leading to #drought impacts; wetter September is alleviating surface water deficit but more sustained rainfall needed to replenish deeper supplies:
nrfa.ceh.ac.uk/sites/defaul...
nrfa.ceh.ac.uk/sites/defaul...
Richard Allan
@rpallanuk.bsky.social
· Sep 12
![People packed onto small boats floating in brown flood waters. The background shows submerged houses and trees. [Getty Images of Pakistan flooding via BBC]](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:u6g7lrvd3rqarb36jqeekqb3/bafkreia3erkra7xk4bjovykbupfcx52v7l74k3iquz3kqwfnnhutxmqpmm@jpeg)
Global #climate hazards @ukhsa.bsky.social 12th September 2025:
🌧️ #flooding & landslides affect Gambia, India, Indonesia, Pakistan & Thailand
🌪️ storms hit Japan
🍞 food insecurity for Guatemala, Madagascar, Mozambique, Gaza
🔥 #wildfire in USA
www.met.reading.ac.uk/~sgs02rpa/ex...
🌧️ #flooding & landslides affect Gambia, India, Indonesia, Pakistan & Thailand
🌪️ storms hit Japan
🍞 food insecurity for Guatemala, Madagascar, Mozambique, Gaza
🔥 #wildfire in USA
www.met.reading.ac.uk/~sgs02rpa/ex...
Richard Allan
@rpallanuk.bsky.social
· Sep 10
Frontiers | Safeguarding the polar regions from dangerous geoengineering: a critical assessment of proposed concepts and future prospects
Fossil-fuel burning is heating the planet with catastrophic consequences for its habitability and for the natural world on which our existence depends. Halti...
www.frontiersin.org
None of geoengineering ideas to protect polar regions from
climate warming are feasible in coming decades, are potentially dangerous to environment & present distraction from efforts to limit climate change by massively & rapidly cutting greenhouse gas emissions:
www.frontiersin.org/journals/sci...
climate warming are feasible in coming decades, are potentially dangerous to environment & present distraction from efforts to limit climate change by massively & rapidly cutting greenhouse gas emissions:
www.frontiersin.org/journals/sci...
Richard Allan
@rpallanuk.bsky.social
· Sep 8
![People gather after a landslide destroyed Tarseen village in South Darfur, Sudan [© Jebel Marra/Emergency Response Room via UN News].](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:u6g7lrvd3rqarb36jqeekqb3/bafkreihprrq72mbpb5j6zaukqsz52tjapdf6cric72wbmykkqawqls5k7i@jpeg)
Global #climate hazards @ukhsa.bsky.social 8th Sept 2025:
🌀 tropical cyclone TAPAH China, Philippines;
🌧️ #floods & landslides Vietnam, north India, Pakistan, Yemen, South Sudan, Sudan, Nigeria, Mauritania, Sierra Leone, USA;
🌩️storms Italy, Japan
🔥 #wildfire USA
www.met.reading.ac.uk/~sgs02rpa/ex...
🌀 tropical cyclone TAPAH China, Philippines;
🌧️ #floods & landslides Vietnam, north India, Pakistan, Yemen, South Sudan, Sudan, Nigeria, Mauritania, Sierra Leone, USA;
🌩️storms Italy, Japan
🔥 #wildfire USA
www.met.reading.ac.uk/~sgs02rpa/ex...