Richard Allan
@rpallanuk.bsky.social
📤 1990
📥 1006
📝 192
Professor of climate science at the University of Reading:
http://www.met.reading.ac.uk/~sgs02rpa/
Jump in SSTs 2023-24 from dual tropical Pacific warming centres & eastward-extended North Atlantic jet stream, boosted by a large global energy imbalance driven by rising grenhouse gases & falling aerosol that was exacerbated by preceding extended La Niña heat sequestration:
doi.org/10.1038/s432...
11 days ago
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Global
#climate
hazards
@ukhsa.bsky.social
18th Dec 2025: 🌧️
#floods
& landslides in Bolivia, Morocco, Palestine, Malaysia & Vietnam ⛈️ storms hit Brazil & USA 🔥
#wildfire
affects Chile 🏭
#smog
over Bosnia & Herzegovina, N India ❄️ heavy
#snow
covers W Canada
www.met.reading.ac.uk/~sgs02rpa/ex...
12 days ago
0
4
1
reposted by
Richard Allan
Ken Rice
12 days ago
www.theguardian.com/environment/...
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‘Massive disruption’: UK’s worst-case climate crisis scenarios revealed by scientists
Scientists say government must prepare for unlikely but ‘plausible’ 4C rise in temperature and a 2-metre rise in sea levels
https://www.theguardian.com/environment/2025/dec/18/massive-disruption-uk-worst-case-climate-crisis-risks
0
6
5
Latest
@ukceh.bsky.social
UK hydrological summary for November 2025 - very wet with shift from
#drought
to
#flood
concerns and consistent with an expected more variable and extreme water cycle in a warming
#climate
:
nrfa.ceh.ac.uk/sites/defaul...
14 days ago
1
12
2
Emerging cold-fresh/warm-salty dipoles in the N Atlantic during 2014 with implications for ocean circulation - more analysis with my Dad in
@tandfresearch.bsky.social
!
doi.org/10.1080/0705...
Animation of OSCAR estimated ocean currents just for fun ⬇️
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14 days ago
0
4
4
reposted by
Richard Allan
Keep Caversham Tidy
17 days ago
We gathered for a festive feed to celebrate our 39 picks by 75 volunteers working a gruelling 942 volunteer-hours to collect 563 small bags + 375 big bags of litter from across Caversham in 2025. As usual Ken wins🥇for the most picks (35)! Thanks to
@dofe.org
volunteers for their help
#litterpickers
0
7
1
Global
#climate
hazards
@ukhsa.bsky.social
12th December 2025: 🌧️
#flooding
& landslides across Malaysia, Thailand, Indonesia, Vietnam, Sri Lanka, Iraq, DR Congo, USA & Brazil 🔥
#wildfire
in Australia ⛈️ winter storm hits Palestine
www.met.reading.ac.uk/~sgs02rpa/ex...
18 days ago
0
4
3
reposted by
Richard Allan
Reading Meteorology
18 days ago
Festive tunes have arrived
@unirdg-met.bsky.social
following our last weather & climate discussion!
0
7
2
The
@uniofreading.bsky.social
authors of
@ipcc.bsky.social
7th assessment met in Paris with 2
@unirdg-met.bsky.social
covering physical processes & climate stabilisation pathways + 1
@unirdg-law.bsky.social
on
#climate
law aspects of mitigation:
www.ipcc.ch/assessment-r...
23 days ago
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12
1
Global
#climate
hazards
@ukhsa.bsky.social
5th Dec 2025: 🌧️
#floods
& landslides affect South & Southeast Asia, Bolivia, Peru & South Africa 🌩️ storms hit DR Congo & New Zealand
www.met.reading.ac.uk/~sgs02rpa/ex...
25 days ago
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6
3
Global
#climate
hazards
@ukhsa.bsky.social
28 Nov 25 🌧️
#floods
& landslides Albania, Italy, South Africa, French Polynesia, Malaysia, Indonesia, Philippines, Vietnam, Mexico ⛈️ storms hit eastern Australia, Brazil, USA, Sri Lanka & India 🥀
#drought
grips Somalia
www.met.reading.ac.uk/~sgs02rpa/ex...
about 1 month ago
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2
2
Slow late November growth in
#Arctic
sea ice extent, 2nd only to 2016 based on
@nsidc.bsky.social
data:
nsidc.org/sea-ice-toda...
about 1 month ago
0
3
3
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...
about 1 month ago
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4
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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...
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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...
https://doi.org/10.1038/s41561-025-01859-1
about 1 month ago
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17
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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...
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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.
https://theconversation.com/how-china-cleaned-up-its-air-pollution-and-what-that-meant-for-the-climate-270170
about 1 month ago
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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...
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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.
https://theconversation.com/the-fast-fix-for-global-warming-that-the-un-climate-summit-cant-ignore-269764
about 1 month ago
1
12
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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!
about 1 month ago
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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...
about 1 month ago
1
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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...
about 2 months ago
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3
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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...
about 2 months ago
0
4
2
reposted by
Richard Allan
Keep Caversham Tidy
about 2 months ago
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/
0
3
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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 2 months ago
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4
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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...
about 2 months ago
1
8
1
reposted by
Richard Allan
Reading Meteorology
about 2 months 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/
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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/
about 2 months ago
1
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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...
about 2 months 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...
2 months ago
0
5
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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
2 months ago
0
5
2
reposted by
Richard Allan
Reading Meteorology
2 months 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
2 months 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
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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...
2 months 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
2 months ago
0
4
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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
2 months 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...
2 months 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...
2 months ago
0
4
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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
3 months ago
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6
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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
3 months ago
0
5
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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...
3 months ago
0
8
1
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...
3 months 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...
3 months ago
0
4
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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...
3 months ago
0
13
4
reposted by
Richard Allan
Reading Meteorology
3 months 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
3 months 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...
3 months ago
0
5
1
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...
4 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...
4 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
4 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...
4 months ago
0
4
0
reposted by
Richard Allan
Reading Meteorology
4 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
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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
4 months ago
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