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Wilson Chan

@wilsonchan.bsky.social
219 followers 350 following 7 posts

Hydroclimatologist UKCEH | PhD Uni Reading | Climate change and hydrological extremes | Views my own 🇭🇰🇬🇧

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Reposted by Wilson Chan
UK Centre for Ecology & Hydrology (UKCEH) @ukceh.bsky.social · 14/08/2026
The UK Hydrological Summary for July looks back at an unprecedented month. It was the driest July in both England and Wales, and third driest of any month for England (in records from 1890). Low flows in many catchments, reservoir stocks decline, dry soils... Full summary tinyurl.com/53ejhrpd
Map indicating river flows in the UK in July 2026 with key. Sites circled recorded record low flows
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Richard Allan @rpallanuk.bsky.social · 13/08/2026
Exceptional southern UK aridity July 2026 @ukceh.bsky.social - record low rainall in England & Wales, heatwaves & wildfires, exceptionally dry soils & low river flows + declining reservoir/groundwater reserves resulting in flash #drought set to persist into Autumn: nrfa.ceh.ac.uk/sites/defaul...
Map showing low groundwater across the UK in July 2026Map showing extreme rainfall deficit in southern UK in July 2026Map showing low river flows in the UK in July 2026Map showing exceptionally dry soils in southern UK in July 2026
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Reposted by Wilson Chan
UK Centre for Ecology & Hydrology (UKCEH) @ukceh.bsky.social · 10/08/2026
After record low July rainfall, what's next for UK river flows? Below normal to exceptionally low flows across England, Wales & NE Scotland will continue with record lows anticipated for August & drought impacts into the autumn. 🎥 Dr Katie Facer-Childs with the latest UK Hydrological Outlook.
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UK Centre for Ecology & Hydrology (UKCEH) @ukceh.bsky.social · 30/07/2026
The drought affecting many parts of the UK is 'remarkable' for how quickly it has progressed, Jamie Hannaford, head of water resources and drought at UKCEH says. Much of central, southern and eastern areas of England are now in drought, joining North Wales and the Upper Severn. 🧪 1/
Map of England showing drought status in different regions
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Met Office - weather and climate @metoffice.gov.uk · 28/07/2026
Wednesday sees the peak of the heat this week, with temperatures likely reaching 35 Celsius in eastern England📈 This would mark the 7th day of 2026 when the UK has recorded 35°C or higher. Prior to this year, the record was 5 days of ≥35°C, set in 1976 and 2020🌡️
A map of the UK showing expected maximum temperatures on Wednesday 29 July 2026. These range from 35 Celsius in southeast and eastern England to 15 Celsius in northern Scotland
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Ed Hawkins @edhawkins.org · 26/06/2026
Two heatwaves. 50 years apart.
25th June 1976 and 2026
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Prof Friederike Otto @frediotto.bsky.social · 26/06/2026
Europe's worst heatwave so far, in terms of heat stress measures and temperatures - brought to you by fossil fuels. New @wwattribution.bsky.social study showing how such deadly heat became possible in only a few decades. www.worldweatherattribution.org/fossil-fuel-...
A map of Europes with dots for all 854 cities analysed, pink dots for the cities that broke humid heat records, grey dots elsewhere. Pink dots conentrated over Southern UK, Germany, Poland and Benelux.
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Emma Monk @monkemma.bsky.social · 24/06/2026
It was inevitable, wasn't it🙄 Of course the Telegraph would run with something like this👇 So let's remove some of the rose-tinted spectacles and also look at some of that data comparing 1976 with modern heat waves Because the 1976 nostalgia porn is wearing a bit thin at this stage 🧵1/23
Telegraph headiline:

"Heatwave hysterics wouldn't have lasted a day in 1976", overlaid with a bold “MONK DEBUNKED” stamp.
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Ed Hawkins @edhawkins.org · 25/06/2026
What could a future heatwave on the island of Ireland look like? A heatwave reaching 38°C is plausible. This particular heatwave is set in 2056 in a world approaching 2.5°C above pre-industrial levels. Analysis: @climatecocentre.bsky.social www.irishtimes.com/environment/...
Plausible temperatures in Ireland during a heatwave set in 2056
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Ed Hawkins @edhawkins.org · 23/06/2026
Happy birthday to the heatwave of 1976 which began today 50 years ago, peaking at 35.9°C. If a comparable heatwave happened in the current climate it would be 3-4°C hotter, peaking at 38-39°C. And the actual forecast is for temperatures of 38-39°C in the next few days with a red heatwave warning.
The summer of 1976 translated into a warmer climate.
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UK Centre for Ecology & Hydrology (UKCEH) @ukceh.bsky.social · 16/06/2026
The UK Hydrological Summary for May 2026 has been published: 🌡️ While showery and changeable in the first three weeks, May was ultimately defined by an exceptional period of heat in the last 10 days. UK rainfall ~78% of average. River flows normal to exceptionally low across most of the UK. 🧪 1/
Maps of UK showing summarising river flows in May 2026 and March to May 2026
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UK Centre for Ecology & Hydrology (UKCEH) @ukceh.bsky.social · 22/05/2026
We welcome the new report by the House of Lords Environment and Climate Change Committee, which draws attention to the importance of understanding and managing drought. UKCEH's Jamie Hannaford (pictured left) and Kathryn Brown contributed to the inquiry. Report (PDF): tinyurl.com/5fpj74wc
Three people seated in House of Lords meeting room
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Ed Hawkins @edhawkins.org · 13/05/2026
Imagine the same synoptic weather patterns occurred in a warmer world. How would our experience of the weather be different? Warmer? Yes Wetter? Only on the wettest 10% of days Everyday weather in a warmer world by Thomas et al.: egusphere.copernicus.org/preprints/20...
Changed temperature and rainfall in an example month in Central England
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Ed Hawkins @edhawkins.org · 17/04/2026
Communicating changes in the intensity of UK heatwaves Global warming of ‘just’ 1°C does not necessarily sound like a problem. But in the UK, the hottest summer days are warming much faster than typical summer days, changing our experience of heatwaves rmets.onlinelibrary.wiley.com/doi/full/10....
rmets.onlinelibrary.wiley.com
Communicating changes in the intensity of UK heatwaves
Communicating how a global warming of ‘just’ 1°C affects people is challenging. The hottest UK summer days have warmed more than 3 times faster than the rate of global warming in the past century, ca...
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UK Centre for Ecology & Hydrology (UKCEH) @ukceh.bsky.social · 24/03/2026
UKCEH and @rothamsted.bsky.social modelling shows how climate change could reshape GB’s rivers/farms by 2050. Findings: river nutrients ↑20–30%, ↑ west coast fluxes (3–10%), ↓ east (3–13%), 5-20% drop in most arable yields, 20% boost in maize yields Read more: agzeroplus.org.uk/news-and-med... 🧪
Aerial view of river winding through farmed fields
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Matt Fry @mattfry-ukceh.bsky.social · 12/03/2026
Fantastic new @ukceh.bsky.social dataset now out: 30-minute actual evapotranspiration from 45 sites for up to 10 years, with measurements co-located with rainfall and multiple soil moisture measurements from our @cosmosuk.bsky.social network over the same period: catalogue.ceh.ac.uk/documents/c0...
catalogue.ceh.ac.uk
Sub-daily actual evapotranspiration data for 45 monitoring sites (2014-2024) [COSMOS-UK] - EIDC
This dataset provides derived measurements of land-atmosphere energy and water exchanges from selected COSMOS-UK environmental monitoring sites across the United Kingdom, collected between 2014 and 20...
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UK Centre for Ecology & Hydrology (UKCEH) @ukceh.bsky.social · 16/02/2026
What happened with river flows, groundwater levels and reservoirs in January? The latest UK Hydrological Summary was published today! nrfa.ceh.ac.uk/sites/defaul... (PDF) 2/
Map of UK with Jan 2026 river flows indicated at various sites
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UK Centre for Ecology & Hydrology (UKCEH) @ukceh.bsky.social · 10/02/2026
From drought to downpour, 2025 brought the UK whiplash weather 🌦️ New on our Counting the Earth podcast, we delve into the UK's weather extremes. After a dry spring & four heatwaves we had significant rainfall later in the year. By December, total rainfall reached ~90% of the UK average. 1/
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UK Centre for Ecology & Hydrology (UKCEH) @ukceh.bsky.social · 06/02/2026
Latest UK Hydrological Outlook 🌧️ River flows in eastern Scotland likely normal to above normal over next 3 months; flows elsewhere in the normal range except southern England. Here, river flows & groundwater levels likely above normal to notably high. See more: hydoutuk.net/latest-outlook 🧪
Map of UK showing detail for February 2026 UK Hydrological Outlook
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UK Centre for Ecology & Hydrology (UKCEH) @ukceh.bsky.social · 05/02/2026
We need to talk about drought. Yes, that's right, drought! Our weather is experiencing extremes – from flooding to drought – so on the next episode of Counting the Earth, we'll be delving deeper into this whiplash weather. 🎧 Subscribe now and never miss an episode: www.ceh.ac.uk/news-and-med...
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Ed Hawkins @edhawkins.org · 06/01/2026
Putting the hot & dry summer of 1976 into context 50 years after the extreme summer for the UK and Ireland, what can we still learn? climatelabbook.substack.com/p/the-summer...
Comparing summers of 1976 and 2024 for the UK and Ireland
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Ed Hawkins @edhawkins.org · 18/12/2025
Plausible worst-case climate futures and extreme events for the UK Paper by Arnell et al.: agupubs.onlinelibrary.wiley.com/doi/10.1029/... Article: www.theguardian.com/environment/...
theguardian.com
‘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
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UK Centre for Ecology & Hydrology (UKCEH) @ukceh.bsky.social · 11/12/2025
Mobilising multilateral action is essential for water security. A new policy brief from the UK Committee for International Hydrology (UKCIH) calls for coherent global action as billions face worsening water challenges. Read it here ➡️ www.ceh.ac.uk/sites/defaul... [PDF] 💧🧪 1/
Poster titled "Accelerating Multilateral Action for Global Water Security" by UNESCO. Highlights the critical need for coordinated water management and the projected $5.6 trillion economic loss by 2050 due to inaction. Features a QR code and partners' logos, including UKCEH, University of Birmingham, and others.
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Ed Hawkins @edhawkins.org · 08/12/2025
Exciting jobs & PhD studentship! 1) postdoc in historical windstorms: jobs.reading.ac.uk/Job/JobDetai... 2) postdoc in extreme event storylines: jobs.reading.ac.uk/Job/JobDetai... 3) PhD in redeveloping the Central England Temperature series (led by Tim Osborn): www.findaphd.com/phds/project...
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CANARI @canari-science.bsky.social · 04/12/2025
🌍 CANARI scientists @ukceh.bsky.social briefed the @houseoflords.parliament.uk Environment & Climate Change Committee on drought preparedness 🏜️ @jamiehannahydro.bsky.social shared expert evidence on advances in drought monitoring and changing risks of future droughts 🔗 canari.ac.uk/2025/12/04/c...
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UK Centre for Ecology & Hydrology (UKCEH) @ukceh.bsky.social · 26/11/2025
📣 Call for abstracts #EGU26: How do climate variability patterns (eg ENSO, NAO, AMO) influence water resources & extremes like floods & droughts? 🌍💧 Submit by 15 Jan! 🔗 meetingorganizer.copernicus.org/EGU… #Hydrology #ClimateVariability #WaterResources
Storm clouds and text Join our session at EGU26: Understanding climate variability's impact on hydrological regimes. Abstracts due by January 15, 2026.
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UK Centre for Ecology & Hydrology (UKCEH) @ukceh.bsky.social · 24/11/2025
💧 📢Calling all river flow modellers heading to #EGU26 The UK Hydro-MIP team are inviting submissions for their session on Learning from model differences: model intercomparison, benchmarking and multi-model approaches in hydrology (HS2.2.8) meetingorganizer.copernicus.org/EGU26/sessio... 🧪 1/
Invitation to join a session at EGU26 on learning from model differences in hydrology, focusing on intercomparison, benchmarking, and multi-model approaches. Abstract submissions open.
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Ed Hawkins @edhawkins.org · 21/11/2025
Two exciting postdoc positions available! Historical windstorms - working with two insurance companies to explore UK wind risks: jobs.reading.ac.uk/Job/JobDetai... Extreme event storylines - working as part of a EU collaboration on event attribution: jobs.reading.ac.uk/Job/JobDetai...
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Vikki Thompson @vikkithompson.bsky.social · 06/11/2025
Looking for a #PhD in #ClimateExtremes? We are advertising a project attributing causes of recent #droughts using counter-factual storylines. Based in #Edinburgh, working with Andrew Schurer, me, @gabihegerl.bsky.social, & @edhawkins.org tinyurl.com/5n7b52fr
Droughts cause a wide range of impacts - this image shows a dry riverbed in France.
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Ed Hawkins @edhawkins.org · 01/10/2025
The Rainfall Observers Over the past three centuries, thousands of people across the British & Irish Isles have recorded rainfall, often every day for decades. Here we recognise some of the individuals who made particularly important contributions. rmets.onlinelibrary.wiley.com/doi/10.1002/...
rmets.onlinelibrary.wiley.com
The rainfall observers
Over the past three centuries, thousands of people across the British and Irish Isles have regularly recorded rainfall, often every day for decades. Their efforts allow us to reconstruct long-term tr...
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Steve Turner @steveturner.bsky.social · 01/10/2025
Heading to IAHS 2025 in Roorkee 🇮🇳? 🌏 I’m co-hosting a side event + giving a talk with the ROBIN Network! Let’s talk reference hydrological networks, drought indicators & climate change detection! 🧵👇
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The Royal Society @royalsociety.org · 23/09/2025
Climate change is not a con-job. If you want to know more about the evidence for and causes of #ClimateChange, head to our website: royalsociety.org/news-resourc...
royalsociety.org
Climate change: evidence and causes | Royal Society
Supplementary information for the project 'Climate Change: Evidence and causes'.
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Steve Turner @steveturner.bsky.social · 23/09/2025
Excited to host a hands-on #IAHS2025 workshop with @sayaliuk.bsky.social & @wilsonchan.bsky.social 🗓️ 6 Oct, 18:00 IST | 📍 Roorkee, India Explore the ROBIN dataset, drought indicators & FlowScreen. More info: iahs2025.com/SEROBIN Register: docs.google.com/forms/d/e/1F... #ROBINHydro #Hydrology
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Wilson Chan @wilsonchan.bsky.social · 09/09/2025
📢 New paper! Events like the winter 2023/24 floods are wetter with higher river flows due to climate change. A worst-case “storyline” shows flows could be even higher - anticipating UNSEEN extremes is vital for adaptation. 🔗: doi.org/10.1088/1748... @ukceh.bsky.social @climatecocentre.bsky.social
doi.org
River flow amplification under climate change: attribution and climate-driven storylines of the winter 2023/24 UK floods - IOPscience
River flow amplification under climate change: attribution and climate-driven storylines of the winter 2023/24 UK floods, Chan, Wilson C H, Barker, Lucy J, Faranda, Davide, Hannaford, Jamie
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UK Centre for Ecology & Hydrology (UKCEH) @ukceh.bsky.social · 09/09/2025
🌊 Latest UK Hydrological Outlook: Normal to below normal river flows likely in southern & eastern areas over the next 3 months, with low flows for the time of year persisting in some catchments. River flows in northwestern areas likely shifting towards normal to above normal by November. 🧵🧪 1/
Map of UK with shaded areas showing principal aquifers annotated with information from the September 2025 UK Hydrological Outlook as outlined in the accompanying post.
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Wilson Chan @wilsonchan.bsky.social · 09/09/2025
📢 New paper! Events like the winter 2023/24 floods are wetter with higher river flows due to climate change. A worst-case “storyline” shows flows could be even higher - anticipating UNSEEN extremes is vital for adaptation. 🔗: doi.org/10.1088/1748... @ukceh.bsky.social @climatecocentre.bsky.social
doi.org
River flow amplification under climate change: attribution and climate-driven storylines of the winter 2023/24 UK floods - IOPscience
River flow amplification under climate change: attribution and climate-driven storylines of the winter 2023/24 UK floods, Chan, Wilson C H, Barker, Lucy J, Faranda, Davide, Hannaford, Jamie
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UK Centre for Ecology & Hydrology (UKCEH) @ukceh.bsky.social · 27/08/2025
With exceptionally dry conditions in many parts of the UK this year, hydrologists at UKCEH address the question of whether #globalwarming is increasing severity of #droughts in a guest post for @carbonbrief.org
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Carbon Brief @carbonbrief.org · 26/08/2025
NEW – Guest post: Is climate change making UK droughts worse? ✍️ Jamie Hannaford, @wilsonchan.bsky.social, Lucy Barker, Stephen Turner ➡️ Read here: buff.ly/boBB8nU
buff.ly
Guest post: Is climate change making UK droughts worse? - Carbon Brief
The year 2025 has seen exceptionally dry conditions in many parts of the UK. At...
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Met Office - weather and climate @metoffice.gov.uk · 26/08/2025
Provisional statistics from the Met Office show that summer 2025 will ‘almost certainly’ be the warmest summer on record for the UK. It would move 2018 off the top spot and relegate 1976 out of the top five warmest summer in a series which dates back to 1884. 👉 www.metoffice.gov.uk/about-us/new...
Photograph of bright sun in a clear blue sky with clouds at the bottom. Text reads: 'Met Office NEWS RELEASE 26 August 2025 – This summer will ‘almost certainly’ be warmest on record for the UK.'
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CANARI @canari-science.bsky.social · 30/07/2025
🌊🏜️🌍 New job opportunity @ukceh.bsky.social for a Hydroclimate Scientist to work on the @climatecocentre.bsky.social and @canari-science.bsky.social projects to advance understanding of hydroclimatic extremes in the face of climate change! Apply now: ceh.wd3.myworkdayjobs.com/en-GB/CEH_Ca...
ceh.wd3.myworkdayjobs.com
Hydroclimate Scientist
Salary - £38,939 to £41,321 Hybrid Working Based at Wallingford, Oxfordshire Permanent, full-time We will be closing this advert on 26/08/2025.. Are you a dedicated scientist eager to advance our unde...
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UK Centre for Ecology & Hydrology (UKCEH) @ukceh.bsky.social · 14/07/2025
The UK Hydrological Summary confirms heightened risk of drought impacts this summer — especially in eastern Britain. June was the warmest on record for England and 2nd warmest for the UK overall. Rainfall showed stark regional contrasts, with some areas seeing less than half of average. 🧵🧪 1/
Map of UK showing river flows as percentage of average
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UK Centre for Ecology & Hydrology (UKCEH) @ukceh.bsky.social · 09/07/2025
What is the hydrological outlook for the UK in the weeks and months ahead? Steve Turner talks us through the likely situation for river flows and groundwater levels. See the full outlook: hydoutuk.net/latest-outlook 🧵🧪 1/ #WaterResources @steveturner.bsky.social
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Vikki Thompson @vikkithompson.bsky.social · 08/07/2025
📣 New paper: 💧💧💧 In July 2021 record breaking rainfall hit western Europe, we use ensemble boosting to explore different plausible storylines. These show it could have rained for longer, or over a larger area, or in a different place. Are we prepared? doi.org/10.1038/s432...
Showing the rainfall of 14th July 2021 (upper left) and 5 alternative scenarios derived from a climate model, conditioned to the atmospheric circulation patterns of the observed event.
Similar to fig.6 of https://www.nature.com/articles/s43247-025-02386-y
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Co-Centre for Climate + Biodiversity + Water @climatecocentre.bsky.social · 25/06/2025
Our @ukceh.bsky.social team have written about how studying North Atlantic Ocean patterns can predict UK droughts a year in advance. Read more here: www.ceh.ac.uk/news-and-med...
ceh.ac.uk
Studying North Atlantic Ocean patterns can predict UK droughts a year in advance
Dr Amulya Chevuturi, a hydroclimate data scientist at the UK Centre for Ecology & Hydrology, discusses an exciting research finding that could help the UK better prepare for droughts.
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Amulya Chevuturi @amulyachevuturi.bsky.social · 20/06/2025
🌊 Streamflow Stripes are here!!! 🌊 Just in time for #ShowYourStripes Day – 21st June 🌍 Our team at @ukceh.bsky.social has created UK river flow stripes to visualise how these have changed over time. 📖 Read more: climatelabbook.substack.com/p/visualisin... #ClimateChange #Hydrology #DataViz
climatelabbook.substack.com
Visualising climate impacts on UK river flows
Introducing streamflow stripes #ShowYourStripes
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CANARI @canari-science.bsky.social · 20/06/2025
CANARI scientists from @ukceh.bsky.social have created UK river flow stripes. High flows are rising in the north/west and drought risk growing in parts of the south/east. Adaptation is needed to reduce impacts from swings between wet/dry. 🔗 climatelabbook.substack.com/p/visualisin... (4/4)
climatelabbook.substack.com
Visualising climate impacts on UK river flows
Introducing streamflow stripes #ShowYourStripes
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CANARI @canari-science.bsky.social · 20/06/2025
🔊21st June is #showyourstripes day 🌍 2024 was the warmest year on record globally. The stripes help start a conversation about climate change and climate action🥵 Download your warming stripes here: showyourstripes.info (1/4)
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Ed Hawkins @edhawkins.org · 18/06/2025
As we seem to, yet again, be talking about the hot UK summer of 1976, a reminder that the UK is not the world. Yes, it was hot that summer over our small region, but the bigger picture tells a different story. And, we've had hotter UK summers since.
Comparing temperature anomalies in summer 1976 and summer 2024
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UK Centre for Ecology & Hydrology (UKCEH) @ukceh.bsky.social · 13/06/2025
UK Hydrological Summary for May: Recent rainfall brought some respite but summer began with depleted river flows, groundwater levels & reservoir stocks. Increases risk of further dry weather impacts, with climbing evaporation rates limiting rainfall effectiveness 🔗 nrfa.ceh.ac.uk/sites/defaul...
Two maps of UK indicating river flows for May 2025 and March to May 2025
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CANARI @canari-science.bsky.social · 06/06/2025
New CANARI research reveals predictability for UK summer droughts up to 1.5 years in advance 🏜️ Find out more in the paper published in Nature Communications Earth & Environment, led by @amulyachevuturi.bsky.social: www.nature.com/articles/s43...
nature.com
Oceanic drivers of UK summer droughts - Communications Earth & Environment
North Atlantic sea surface temperature influences hydrology in the United Kingdom up to 1.5 years in advance via a teleconnection with the position of the North Atlantic Current, which can help with d...
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