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Tim Osborn

@timosbornclim.bsky.social

Climate variability and change | Professor of Climate Science & Director of Climatic Research Unit | UEA | Views expressed here are my own, not UEA's

362 Posts2545 Follower505 Folgt
Simon Evans@drsimevans.carbonbrief.org · 2d ago

🧵Right-leaning newspapers are trying to blame Europe's raging wildfires on everything EXCEPT fossil fuels 1. The Wall Street Journal Frontpage story: "Greece fights wildfires as Europe crisis spreads" WSJ editorial: "How green policies fuel fires in Europe"

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Kate Marvel@drkatemarvel.bsky.social · last wk.

Scientists warned you about: ♨️ more/longer/hotter heatwaves (hot planet=hot weather) 🌀 stronger storms (warm water=hurricane food) 🌧️ downpours (warm air holds more water vapor) 🌵 droughts (warm air is thirstier) 🔥 fire weather (hotter, drier) 🌊 sea level rise (land ice melts, warm water expands)

David Ho@davidho.bsky.social · last wk.

There's a lot to unpack in this article about ocean alkalinity enhancement. But the bottom line is that it is way too early to be selling credits for marine CO₂ removal (mCDR) when we don't have a trustworthy way to do carbon accounting for mCDR. 🌊🧪 carbon-pulse.com/530737/

Most mCDR company science is otherwise focused on proving that a particular method actually removes CO2 from the atmosphere, and does so safely. That's established through monitoring, reporting, and verification (MRV) measures, developed by companies that set the rules for generating carbon credits, such as Isometric. Burt acknowledged that this is itself an active area of debate. He argued that Planetary's role is to trust that the MRV measures are robust enough for the company to focus on feeding the right data to the carbon credit-generating methodologies. David Ho, an oceanography professor at the University of Hawaii, was more critical. "It's way too early to be selling credits and claiming that we have any certainty about anything," Ho told Carbon Pulse. Ho said the methodology used to calculate Planetary's carbon credits relies on the use of a single model to determine the volume of CO2 removal. If another model was used, it would generate a different value, he suggested. Scientists at the IPCC run many models and take the average as a fair result, he added. Ho is a lead author for an upcoming IPCC methodology report on the latest CDR science across land, air, and sea. The report could serve as independent proof that the emergent industry is an effective way of removing CO2 from the atmosphere. However, a report outline finalised in late 2025 left OAE out of the table of contents. "You have to ask, why is that? If OAE is really the promising one that everybody's putting money into, why isn't it in that methodology report?" asked Ho.
Dr. Jonathan Foley@globalecoguy.bsky.social · 2w ago

Oh no. Another giant of climate science, oceanography, and understanding the carbon cycle has left us. Jorge Sarmiento was a true giant in the field, and a dedicated mentor to countless students over the years. The entire field owes him a great deal. www.princeton.edu/news/2026/05...

Remembering Jorge Sarmiento, a ‘giant’ in climate studies

Climate scientist Jorge Sarmiento was Princeton's George J. Magee Professor of Geoscience and Geological Engineering, Emeritus, and a professor of geosciences, emeritus.

princeton.edu

MetJam@metjam.co.uk · 3w ago

23,444 km² of the UK exceeded the previous June record of 35.6ºC at Southampton in June 1976, according to provisional HadUK-Grid data; the highest station maximum was 37.7ºC at Lingwood. Two record-breaking heatwaves in two months, with national records broken widely.

Two-panel map titled "UK Peak Daily Maximum Temperature — June 2026, HadUK-Grid 1 km provisional data". The left panel shows the whole UK coloured by each grid cell's highest daily maximum temperature during June 2026, ranging from around 12–15°C in the Scottish Highlands (green) to over 35°C across southern and eastern England (deep red). A cyan hatched area covering 23,444 km² of East Anglia, the East Midlands and the London area marks where temperatures exceeded 35.6°C, outlined by a dark teal contour line; a legend identifies both. The right panel zooms into East Anglia and South East England with labelled towns from Boston and King's Lynn down to Brighton and Dover, plus temperature contour lines every 0.5–1°C. Nearly all of Norfolk, Suffolk, Cambridgeshire and Essex sit inside the record-exceeding area. A white star east of Norwich marks Lingwood, labelled 37.7°C on 26 June 2026 - a new UK June temperature record.
Giai Petit@giai.bsky.social · last mo.

Finally published🙂🙂 A cellective multidisciplinary effort to understand what happens in trees attacked by bark beetles link.springer.com/article/10.1...

From Colonization to Collapse: a Mechanistic Perspective on Tree Mortality by Bark Beetles - Current Forestry Reports

Purpose of Review Bark beetle outbreaks are intensifying under climate change, yet the links among drought stress, beetle attack and colonization, rapid tree mortality, and tree physiology, remain poo...

link.springer.com

Simon Lee@simonleewx.com · 4w ago

1976 is still talked about 50 years later because it was monumentally anomalous for the climate of the time (plus a serious drought). 2026 is making a run at being an exceptional summer (let’s see how August goes), but it won’t be long before its extremes are beaten in our rapidly warming climate.

Met Office - weather and climate@metoffice.gov.uk · 4w ago

Temperatures have exceeded 34°C today for the 8th day this year 🌡️ That makes it a record for the most number of 34°C or higher in a calendar year 👇 The record was previously set in 1976 and 2020 for 7 days

A map of the UK with 34.4C at Wisley
Dr Joanne Williams@jowilliams.bsky.social · 4w ago

Well done PLA - the BBC has picked this up www.bbc.co.uk/news/article...

Port of London Authority launches River Thames safety campaign

Just last week, a boy, 13, died after getting into difficulty in the water at Royal Victoria Dock.

bbc.co.uk

Port of London Authority@londonportauth.bsky.social · last mo.

Every year, young people lose their lives to the Thames. We're launching our #SeeTheRiverSeeTheRisk campaign, helping young people recognise the hidden dangers of the tidal Thames. Please watch and share 💙 Explore free resources and learn more ➡️ pla.co.uk/seetherisk #WaterSafety #RiverThames

ECIU@eciu.net · 4w ago

Contracts for Difference (CfDs) are one of the more misunderstood subsidies, especially the so-called 'budget'. They also differ from what went before in renewable tech So, here's a quick explainer 🧵👇

Zeke Hausfather@zekehausfather.com · last mo.

We are nearly done with the first order draft of the IPCC AR7 report (working group 1). Register to review our work and provide feedback!

IPCC@ipcc.bsky.social · last mo.

📣 IPCC opens registration for experts to review the First Order Draft of Working Group I contribution to Seventh Assessment Report. The review runs from 10 August until 2 October. Interested experts can register until 25 Sept 2026: https://bit.ly/4vi25cq Read more 🔗 https://bit.ly/WGI7Fod

Richard Dixon@catinsight.bsky.social · last mo.

The higher maxima that Ed refers to shown up nicely in the Central Maximum England Temperature trace contrasting 1976 and 2026. Note also Mar-May and how much warmer 2026 has been. Of the 122 days from Mar-Jun, 2026 has had 83 warmer CET days than 1976...

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Ed Hawkins@edhawkins.org · last mo.

Comparing the UK heatwaves of June 1976 and June 2026... Daytime maximum & night minimum temperatures were much hotter in 2026. Details: maxima over 21st-30th June in both years. Uses provisional 2026 HadUK-Grid data from Met Office NCIC. Note the difference scale is larger for night minimums.

Comparing peak temperatures during June 1976 and June 2026
National Centre for Atmospheric Science@ncas-uk.bsky.social · last mo.

25 years, one changing atmosphere, and a community of NCAS people dedicated to understanding it. Together we've enabled 25 years of discovery, collaboration, and impact. Together, we're leading atmospheric science in a changing world - and we're only getting started. Let's celebrate together 💙

Ed Hawkins@edhawkins.org · last mo.

Comparing the UK heatwaves of June 1976 and June 2026... Daytime maximum & night minimum temperatures were much hotter in 2026. Details: maxima over 21st-30th June in both years. Uses provisional 2026 HadUK-Grid data from Met Office NCIC. Note the difference scale is larger for night minimums.

Comparing peak temperatures during June 1976 and June 2026Comparing night-time temperatures during June 1976 and June 2026
Adam Vaughan@adamvaughan.bsky.social · last mo.

This also interesting today from YouGov on how "environment" has fared in "most important issues facing the UK" over time. A reminder that it's still much higher than when the Paris Agreement was agreed more than a decade ago, for example. But clearly less salient than during protests & COP26.

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Tim Osborn@timosbornclim.bsky.social · last mo.

I went sailing on the north Norfolk coast for some relief from the heat. Then the wind changed just after 6pm and the temperature shot up. Here’s Weybourne obs, showing an impressive 8.3C increase in one hour from 6pm to 7pm, reaching 34.8C having not exceeded 29C all day

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MetJam@metjam.co.uk · last mo.

37.3°C at Santon Downham in Suffolk is provisionally the hottest UK June day in history, beating 35.6°C set at Southampton in 1976 by 1.7°C. It is the sixth hottest day in UK history, beating 37.1°C at Cheltenham in August 1990, which was once the all-time UK record. An unprecedented heatwave.

Spaghetti chart showing Santon Downham daily maximum temperatures for every day of the year from 1959 to 2026. Faint grey lines trace 67 years of historical data, forming a seasonal cycle from around 5°C in winter to a summer peak of roughly 28°C. A bold dashed amber horizontal line marks the previous June maximum temperature record of 34.6°C, set on 27 June 1976. A thick red line shows 2026's observed temperatures, climbing steeply through the second half of June, well above the entire historical envelope at that point in the year. A large bold number, '37.3°C', sits at the top of the chart, connected by an arrow to the peak of the red line on 26 June 2026. Two bold subtitle lines state that this is provisionally the hottest UK June day in history, exceeding the old record of 35.6°C at Southampton on 28 June 1976, and that it is the sixth hottest day in UK history overall, beating 37.1°C at Cheltenham on 3 August 1990. A small inset map of the United Kingdom in the lower half of the chart shows a red marker pinpointing Santon Downham's location in Suffolk.