Richard Allan
@rpallanuk.bsky.social
📤 1930
📥 986
📝 170
Professor of climate science at the University of Reading:
http://www.met.reading.ac.uk/~sgs02rpa/
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...
about 18 hours ago
0
2
0
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...
2 days ago
1
8
1
reposted by
Richard Allan
Reading Meteorology
5 days ago
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...
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When the Lakes Remember: Unravelling the Sudd Floods of 2022
By Douglas Mulangwa –
[email protected]
Between 2019 and 2024, East Africa experienced one of the most persistent high-water periods in modern history: a flood that simply would no…
https://socialmetwork.blog/2025/10/28/when-the-lakes-remember-unravelling-the-sudd-floods-of-2022/
0
3
1
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...
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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
https://www.newscientist.com/article/2502290-your-flight-emissions-are-way-higher-than-carbon-calculators-suggest/
5 days ago
1
122
82
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...
8 days ago
0
5
1
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...
9 days ago
0
5
2
Rapid warming from rising greenhouse gases + declining aerosol particle pollution are worsening extremes, depleting groundwater & limiting carbon uptake by land -
#10ClimateInsights
:
10insightsclimate.science
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10 New Insights in Climate Science
Essential research findings to support decision-making in a critical decade.
https://10insightsclimate.science
9 days ago
0
5
2
reposted by
Richard Allan
Reading Meteorology
9 days ago
Expert comment about more destructive tropical cyclones as the world warms:
theconversation.com/hurricane-me...
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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.
https://theconversation.com/hurricane-melissa-is-a-warning-why-violent-storms-are-increasingly-catching-the-world-off-guard-268604?utm_medium=email&utm_campaign=Latest%20from%20The%20Conversation%20for%20October%2029%202025%20-%203565236356&utm_content=Latest%20from%20The%20Conversation%20for%20October%2029%202025%20-%203565236356+CID_6f32aa72c0c9f62fec94f0864acc4020&utm_source=campaign_monitor_uk&utm_term=Hurricane%20Melissa%20is%20a%20warning%20%20why%20violent%20storms%20are%20increasingly%20catching%20the%20world%20off%20guard
0
19
15
reposted by
Richard Allan
CNN
12 days ago
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
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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.
https://www.cnn.com/weather/live-news/hurricane-melissa-jamaica-landfall-monday-climate?Date=20251027&Profile=CNN&utm_content=1761593432&utm_medium=social&utm_source=bluesky
11
77
46
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...
15 days ago
0
4
1
Forecasting renewable energy droughts (and floods) is increasingly crucial in developing a flexible grid and stable electricity prices:
theconversation.com/how-a-more-f...
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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.
https://theconversation.com/how-a-more-flexible-energy-grid-can-cope-better-with-swings-in-britains-weather-267577
18 days ago
0
4
1
Landmark global shipping deal to reduce emissions suspended as Trump spouts usual nonsense
www.bbc.com/news/article...
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Landmark global shipping deal abandoned under US threats
President Trump intervened in the talks calling the deal a "green scam".
https://www.bbc.com/news/articles/c3vnl0yxg53o
22 days ago
2
8
10
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...
22 days ago
0
9
2
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...
22 days ago
0
4
0
Unseasonal
#drought
and heat combine with unusual fuel buildup from previous wet years to intensify wildfires as a consequence of human caused warming of
#climate
add a skeleton here at some point
23 days ago
0
6
2
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...
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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.
https://theconversation.com/three-ways-to-make-the-uks-food-system-more-resilient-according-to-new-report-by-150-experts-265603
23 days ago
0
5
3
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...
29 days ago
0
7
0
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...
about 1 month ago
0
4
1
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...
about 1 month ago
0
4
0
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...
about 1 month ago
0
13
4
reposted by
Richard Allan
Reading Meteorology
about 1 month ago
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...
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Severe storm forecasts set to improve with new satellite - University of Reading
https://www.reading.ac.uk/news/2025/Research-News/Severe-storm-forecasts-set-to-improve-with-new-satellite
0
2
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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...
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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.
https://theconversation.com/the-ganges-river-is-drying-faster-than-ever-heres-what-it-means-for-the-region-and-the-world-265891
about 1 month ago
1
20
10
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...
about 2 months ago
0
4
0
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...
about 2 months ago
1
9
1
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...
about 2 months ago
0
7
2
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...
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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...
https://www.frontiersin.org/journals/science/articles/10.3389/fsci.2025.1527393/full
about 2 months ago
0
24
7
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...
2 months ago
0
4
0
reposted by
Richard Allan
Reading Meteorology
2 months ago
Calling all past Mets! As we celebrate 100 years of the University of Reading we invite you to take part in our Alumni Centenary Census. Your story is an important part of the University's legacy — and that's why we want to hear from you. Add your voice today:
rdg.ac/censusln
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Alumni Centenary Census - University of Reading
If you are a Reading or Henley Business School graduate, celebrate our centenary year with us by taking part in our online census and helping to shape our story.
https://rdg.ac/censusln
0
2
1
The latest
@ukhsa.bsky.social
global hazards bulletin has been updated up to the 29th August 2025 with links to recent and ongoing
#climate
extremes:
www.met.reading.ac.uk/~sgs02rpa/ex...
loading . . .
Click on date for Public Health England global extremes bulletin, click on year for Roger Brugge's World Weather News. See also Guardian Weather Extremes (latest with back catalogue as far as 2018).
https://www.met.reading.ac.uk/~sgs02rpa/extreme.html
2 months ago
0
4
0
Foolish, reckless and politically desperate:
www.bbc.com/news/article...
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Tories pledge to get 'all our oil and gas out of the North Sea'
The government warns Kemi Badenoch's plans would "only accelerate the worsening climate crisis".
https://www.bbc.com/news/articles/cp890n51684o
2 months ago
2
10
4
reposted by
Richard Allan
Keep Caversham Tidy
3 months ago
14 cleared Mill Green, Caversham, collecting 10 large/12 small bags of litter. Cigarette ends continue to disease the tarmac arteries of our streets. Thanks to our
@dofe.org
volunteers and to Gabi for leading. Find details of further missions on our website:
www.met.reading.ac.uk/~sgs02rpa/KCT/
0
6
2
Global
#climate
hazards
@ukhsa.bsky.social
15th Aug 2025: 🔥
#heatwave
&
#wildfires
grip southern Europe 🌧️
#floods
& landslides affect Pakistan, India, China, Japan, Mexico, Cape Verde, Cameroon, Nigeria 🌀 tropical cyclone PODUL hits Taiwan/China
www.met.reading.ac.uk/~sgs02rpa/ex...
3 months ago
0
7
2
Rainfall below average in southwest UK July 2025 with mostly dry soils, declining groundwater/reservoir stocks & low river flows away from northwest + drought affecting East/West Midlands, North-West England & Yorkshire with low river flows expected to persist:
nrfa.ceh.ac.uk/sites/defaul...
3 months ago
0
7
0
reposted by
Richard Allan
Keep Caversham Tidy
3 months ago
Our tenacious ten (plus photo muggins) unlittered Lower Caversham, collecting 8 large/13 small bags, N2O canisters and reported flytipping. Thanks to our
@dofe.org
volunteer. Find out more about our group online!
www.met.reading.ac.uk/~sgs02rpa/KCT/
0
7
2
Global
#climate
hazards
@ukhsa.bsky.social
: 🌡️ heatwave multiple regions 🔥 wildfires Canada, USA, France, Portugal 🌧️ floods/landslides Australia, China, Taiwan, India,Laos,Myanmar,Vietnam,S Korea,Japan,USA ⛈️storms Ethiopia, Italy 💨duststorm Peru 🥀drought Somalia
www.met.reading.ac.uk/~sgs02rpa/ex...
3 months ago
0
5
1
reposted by
Richard Allan
John Kennedy
3 months ago
Nothing ever changes but the climate Some initial notes on the DOE Critical Review of Impact of Greenhouse Gas Emissions on the US Climate And a 🧵 of other responses I'm aware of (let me know if you know of others)
diagrammonkey.wordpress.com/2025/08/01/n...
1/n
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Nothing every changes but the climate
When I became a climate scientist nearly 22 years ago, I started accumulating books on the subject. One of the first was called something1 like “Global Warming: Apocalypse or Hot Air?” …
https://diagrammonkey.wordpress.com/2025/08/01/nothing-every-changes-except-the-climate/
5
37
19
Nice to see
@metoffice.gov.uk
and BBC making friends again!
add a skeleton here at some point
3 months ago
0
8
0
Unprecedented continental drying since 2002 based on satellite data and dominated by high-latitude water losses, intense Central American/European
#drought
& groundwater depletion:
doi.org/10.1126/scia...
Consistent with earlier work:
doi.org/10.1007/s107...
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Unprecedented continental drying, shrinking freshwater availability, and increasing land contributions to sea level rise
Drying continents, extreme drought, and groundwater depletion are shrinking water availability and increasing sea level rise.
https://doi.org/10.1126/sciadv.adx0298
3 months ago
1
14
10
Carbon uptake diminished in 2024 as decomposition in hot, wet conditions sped up, based on a preprint by Jiang et al. (
www.researchsquare.com/article/rs-6...
), leading to record annual growth rates in atmospheric CO2 as seen in the
@climate.noaa.gov
data:
www.met.reading.ac.uk/~sgs02rpa/co...
3 months ago
2
15
11
Global
#climate
hazards
@ukhsa.bsky.social
25th July 2025: 🌧️
#floods
across Pakistan, China, South Korea 🔥
#wildfires
in Greece, Cyprus, Turkey 🥀
#drought
over Iran ⛈️ storms hit Ethiopia, France, Romania, Thailand, Vietnam 🌀 typhoon Co-may hits Philippines
www.met.reading.ac.uk/~sgs02rpa/ex...
4 months ago
0
9
4
reposted by
Richard Allan
Reading Meteorology
4 months ago
Meteorology & Climate online courses
@uniofreading.bsky.social
suitable for professional meteorologists, consultants, STEM students, graduates & academics seeking to improve their range of skills and knowledge. Details & applications:
www.reading.ac.uk/meteorology/...
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Online classes - Department of Meteorology, University of Reading
Discover a wide range of online meteorology courses at the University of Reading. Study topics such as atmospheric dynamics, thermodynamics, statistical analysis, and more.
https://www.reading.ac.uk/meteorology/online-courses/classes
0
6
1
reposted by
Richard Allan
Reading Meteorology
4 months ago
As the hosepipe ban kicks in over parts of Reading we look at how this summer so far compares to the UK’s infamous hot, dry summer of 1976 in this week’s
@unirdg-met.bsky.social
blog:
blogs.reading.ac.uk/weather-and-...
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How does the UK summer so far compare to the extreme hot, dry summer of 1976?
By Dr Laura Baker Senior NCAS Scientist in the Department of Meteorology As we come to the end of the third heatwave of 2025, and a third English water board has announced a hosepipe ban, more an…
https://blogs.reading.ac.uk/weather-and-climate-at-reading/2025/how-does-the-uk-summer-so-far-compare-to-the-extreme-hot-dry-summer-of-1976/
0
43
25
Global
#climate
hazards
@ukhsa.bsky.social
18 Jul 2025: 🔥
#wildfires
Canada, USA, Spain 🌧️
#floods
& landslides China, Nepal, India, Indonesia, South Korea, Mexico, USA, Ecuador, Spain, Sudan 🌪️ tornado New Zealand ⚡ lightning eastern USA
www.met.reading.ac.uk/~sgs02rpa/ex...
4 months ago
0
4
0
Researchers from
@unirdg-met.bsky.social
have analysed UK-wide trends for three major pollutants.
theconversation.com/uk-air-quali...
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UK air quality is improving but pollution targets are still being breached – new study
Researchers have analysed UK-wide trends for three major pollutants.
https://theconversation.com/uk-air-quality-is-improving-but-pollution-targets-are-still-being-breached-new-study-260961
4 months ago
0
11
4
Clean up of particle pollution across East Asia caused more sunlight to reach the oceans as clouds became less reflective, combining with rising greenhouse gases to accelerate in warming of climate since around 2010:
doi.org/10.1038/s432...
4 months ago
0
5
1
Unsettled start to June 2025 in UK then heatwaves with dry conditions in east & low river flows, very dry soils, declining groundwater/reservoir levels with drought in northern England and heightened risk of drought elsewhere:
nrfa.ceh.ac.uk/sites/defaul...
4 months ago
0
3
0
Risk of drought ending with once in a year heavy precipitation event doubles over Europe by mid centrury based on regional modelling, highlighting need to adapt to more of these compound extremes:
doi.org/10.1038/s416...
4 months ago
1
13
4
Global
#climate
hazards
@ukhsa.bsky.social
11th Jul 2025: 🌧️ floods China, Nepal, Pakistan, India, Bangladesh, Myanmar, Indonesia, Colombia, Ecuador, USA, Nigeria 🌀 tropical cyclone DANAS China/Taiwan 🔥 wildfire France, Spain, Syria ⛈️ storms Italy, Romania, USA
www.met.reading.ac.uk/~sgs02rpa/ex...
4 months ago
0
12
2
Strengthening global atmospheric circulation across latitudes since 2000 based on mid-latitude upper tropospheric cloud motion speed increases (up to 4 m/s/decade in southern hemisphere) from MISR satellite data with poleward movement of northern tropics & both polar fronts:
doi.org/10.1038/s415...
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Decadal changes in atmospheric circulation detected in cloud motion vectors - Nature
Analysis of cloud motion vectors from the Multi-angle Imaging SpectroRadiometer over the past two decades indicates an acceleration and poleward shift of atmospheric circulation, and comparison with E...
https://doi.org/10.1038/s41586-025-09242-1
4 months ago
1
7
1
Freshening & stratification of Southern Ocean since the 1980s reversed around 2015 and has coincided with subsequent dramatic decline in Antarctic sea ice coverage:
doi.org/10.1073/pnas...
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PNAS
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...
https://doi.org/10.1073/pnas.2500440122
4 months ago
0
5
1
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