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Tim Raupach

@timraupach.com

3.6K followers 470 following 210 posts

Scientia Senior Lecturer at UNSW Sydney Institute for Climate Risk and Response. I study severe storms, especially hail, in a changing climate ⛈️. I also take photos and climb mountains. These views are my own. https://timraupach.com

timraupach.com

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Tim Raupach @timraupach.com · 1d

Oh, very good! 👏

Tim Raupach @timraupach.com · 1d

Okay, but the ice still played rather a major role, no? www.nytimes.com/2025/10/06/s...

Wreck of Shackleton’s Endurance Tied to Culprit Other Than Ice

www.nytimes.com

Tim Raupach @timraupach.com · 14d

This feels like the right music to be listening to while working on climate projections of hail risk to crops...

Tim Raupach @timraupach.com · 15d

Great new research from Killian Brennan and Lena Wilhelm shows that hailstorms in Europe are influenced by dust from the Sahara. Crucial to gain this kind of microphysical understanding for hailstorms. acp.copernicus.org/articles/25/...

Saharan dust linked to European hail events

Abstract. Saharan dust significantly influences hail occurrence in Europe. Using Copernicus Atmosphere Monitoring Service (CAMS) and reanalysis data, crowd-sourced hail reports, lightning data, and ra...

acp.copernicus.org

Tim Raupach @timraupach.com · 23d

Thanks for all the work on the report - you all did an amazing job.

Tim Raupach @timraupach.com · 23d

It’s not an impossible problem, though, because with careful monitoring and thorough simulation studies we can get new insights. This is why it’s important that we continue with our work to better understand these systems and their changes in a warming climate. 4/4

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Tim Raupach @timraupach.com · 23d

However, changes for severe convective storms and for large hail can, at this stage, be given only with low confidence. The report is quite correct to clearly state this uncertainty. This is because the physical scale and relative rarity of storms makes them hard to observe and model. 3/4

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Tim Raupach @timraupach.com · 23d

Severe convective storms including hail are one of ten priority hazards identified by the report. Modelled economic costs for a mid-century moderate emissions scenario are high for storms and hail. Storms are affected by climate change and can be extremely damaging, so are a key climate risk. 2/4

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Tim Raupach @timraupach.com · 23d

The Australian Climate Service's National Climate Risk Assessment is an excellent document - it gives a comprehensive and robust assessment of the state of knowledge on climate risks now and for the future. It makes for sobering reading. 1/4
www.acs.gov.au/pages/nation...

National Climate Risk Assessment

Learn about Australia's first National Climate Risk Assessment.

www.acs.gov.au

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Reposted by Tim Raupach

Michael Hobbes @michaelhobbes.bsky.social · Aug 30

On one hand, reducing car use reduces urban pollution.
But on the other, everyone likes it and cities become more livable

Average nitrogen dioxide concentration in Paris has fallen significantly

Her proposals have faced pushback — from right-leaning politicians, a car owners’ association and suburban commuters, who say that targeting cars makes their lives more difficult.

But last month, Parisians voted in a referendum to turn an additional 500 streets over to pedestrians. A year earlier, Paris had moved to sharply increase parking fees for SUVs, forcing drivers to pay three times more than they would for smaller cars. The city has also turned a bank of the Seine from a busy artery into a pedestrian zone and banned most car traffic from the shopping boulevard of Rue de Rivoli.

Carlos Moreno, a professor at Paris 1 Panthéon-Sorbonne University and a former adviser to the city, said the French capital has developed “an urban policy based on well-being.”

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Tim Raupach @timraupach.com · Aug 28

The @ametsoc.org has released a statement on the deeply flawed DoE 2025 Climate Synthesis report. It reaffirms that the modern climate is changing primarily because of human influence; this is harmful; scientists agree; and response options are available. Read here: www.ametsoc.org/ams/about-am...

The Practice and Assessment of Science: Five Foundational Flaws in the Department of Energy's 2025 Climate Report

Adopted by the Executive Committee of the AMS Council on 27 August 2025

www.ametsoc.org

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Tim Raupach @timraupach.com · Aug 27

Shocked to discover that Excel can't open two independent documents that have the same filename. In 2025.

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Tim Raupach @timraupach.com · Aug 17

David Bowen’s “plant machete” uses electrical signals from a houseplant to control a machete vimeo.com/744608966?fl...

plant machete

This installation enables a live plant to control a machete. plant machete has a control system that reads and utilizes the electrical noises found in a live philodendron.…

vimeo.com

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