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Tim Raupach

@timraupach.com
3.6K followers 516 following 301 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. timraupach.com

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Tim Raupach @timraupach.com · 29/09/2026
Carbon Impacts Tracer (carbonimpactstracer.com) traces carbon emissions from individual projects to quantified impacts across eight areas, including heatwave deaths in Europe. The makers explainer is here: theconversation.com/we-can-final... @sarahinscience.bsky.social @wesmorgan.bsky.social
theconversation.com
We can finally measure the damage each new coal, gas or oil project will do to people and nature
For decades, we couldn’t trace the link between new fossil fuel projects and their damage to people and planet. But now we can.
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Tim Raupach @timraupach.com · 23/09/2026
@zekehausfather.com on how governments should be preparing for the coming El Niño that has a forecast >90% chance of being the strongest on record www.nature.com/articles/d41...
nature.com
The worst El Niño in recorded history is brewing — here’s how governments must prepare
From southern Africa to the Amazon, the risks are mounting and the window for action is rapidly closing.
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Tim Raupach @timraupach.com · 22/09/2026
Respect and applause to @andrewkingclimate.bsky.social, @alexborowiak.bsky.social, Ruchit Kulkarni, @drkimclimate.bsky.social, @taimoorsohail.bsky.social, Gen Tolhurst, & Anna Zehrung for this piece on making climate science more inclusive for LGBTQIA+ scientists 🌈 www.nature.com/articles/s41...
nature.com
Increasing LGBTQIA+ inclusion in climate science
Nature Climate Change - LGBTQIA+ climate scientists have long encountered oppression and discrimination across society and in the workplace. We suggest specific actions, which need to be supported...
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Tim Raupach @timraupach.com · 21/09/2026
Interested in doing a PhD related to hail, microphysics, and solar energy? See this opportunity and apply by 30 November! www.unsw.edu.au/research/hdr...
unsw.edu.au
Regional hail properties for site-optimised solar modules
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Reposted by Tim Raupach
Andrew B. Watkins @windjunky.bsky.social · 14/09/2026
My latest for the Conversation - a year on from the release of the NCRA, so what do we have to show for it (TL:DR not much). We have to do better, because we know the future we face. theconversation.com/its-been-one...
theconversation.com
It’s been one year since Australia assessed its national climate risk. But have we listened?
Over the past 12 months, the federal government has approved multiple fossil fuel projects and cut climate science funding.
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Tim Raupach @timraupach.com · 09/09/2026
What a reassuring energy company I have. It's September - but hey, although winter is (apparently) here, big bills don't have to. They should make this their slogan.
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Reposted by Tim Raupach
Tim Raupach @timraupach.com · 27/08/2026
On Monday, stage 3 of La Vuelta a España, the cycling race, was cancelled after a hailstorm forced riders to take cover and left hail covering the road. Let’s take a look at what happened! www.youtube.com/watch?v=ddn7... 1/14
youtube.com
Hailstorm cancels Vuelta stage as riders seek safety
YouTube video by SBS Sport
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Tim Raupach @timraupach.com · 28/08/2026
This visualisation of satellite imagery shows well the scale of the glacier collapse and/or landslide that caused the flash flood in Nepal. www.abc.net.au/news/2026-08...
abc.net.au
Satellite images reveal giant scar left after glacier snaps in Nepal
Climate scientists have been warning that the Himalayas are warming faster than the rest of the world, increasing the chances of a disaster of this scale.
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Tim Raupach @timraupach.com · 28/08/2026
Devastating scenes from the terrible flood in Nepal. There will be lots of complex causes for this individual event but it does raise the question of whether mountain destabilisation is accelerating. www.nytimes.com/2026/08/27/c...
nytimes.com
Climate Change Raises Risk of Disasters Like Nepal Floods (Gift Article)
Glaciers and permafrost in the Himalayas are melting faster as temperatures rise, though scientists are still studying the exact causes of this week’s landslide.
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Tim Raupach @timraupach.com · 27/08/2026
On Monday, stage 3 of La Vuelta a España, the cycling race, was cancelled after a hailstorm forced riders to take cover and left hail covering the road. Let’s take a look at what happened! www.youtube.com/watch?v=ddn7... 1/14
youtube.com
Hailstorm cancels Vuelta stage as riders seek safety
YouTube video by SBS Sport
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Tim Raupach @timraupach.com · 27/08/2026
Terrifying scenes from this awful flood in Nepal and Tibet. www.nytimes.com/interactive/...
nytimes.com
See How Nepal’s Flash Floods Caused Widespread Destruction (Gift Article)
Floodwaters swept away villages near the border between Nepal and the Tibet region of China.
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Tim Raupach @timraupach.com · 11/08/2026
This is good. Should you use AI for a task? Bruce Schneier suggests considering whether the task is "work" or "gym". www.theguardian.com/commentisfre...
theguardian.com
Should you use AI for a task? Here’s a simple way to decide | Bruce Schneier
Sometimes, what matters isn’t your output but what you put into the process. Think of it like work v the gym
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Tim Raupach @timraupach.com · 07/08/2026
In this new paper with Sarah Bang and John Allen, we used simulations to examine satellite hail detections in the Australian tropics. Roughly 1/4 of the simulations produced damaging hail at the surface. 1/4 rmets.onlinelibrary.wiley.com/doi/10.1002/...
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Tim Raupach @timraupach.com · 04/08/2026
It’s great to be in Fukuoka for #AOGS2026. For this Sydneysider, experiencing WBGT over 34C also really puts heat-stress projections into perspective.
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Tim Raupach @timraupach.com · 03/08/2026
Still amused at atmospheric science journal proofs coming back with "reanalyses" - as in the plural of reanalysis - changed to "reanalyzes".
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Tim Raupach @timraupach.com · 19/07/2026
Just spent a wonderful week visiting Uluṟu and Kata Tjuṯa on Anangu land. Peaceful and magical places.
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Tim Raupach @timraupach.com · 10/07/2026
Wow, @egu.eu really badly wants candidates for treasurer and ECR union rep. To their credit I normally skim-read these emails but after the 30th identical email I did read it properly.
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Tim Raupach @timraupach.com · 10/06/2026
How much is climate change already costing us? New work by Timothy Neal and Ben Newell shows that in New South Wales, Australia, that number is on average about $20k in lost income per person per year. Climate change is already a quality-of-life issue. theconversation.com/climate-chan...
theconversation.com
Climate change has already made Australians in one state much poorer, and more’s to come
It’s time to recognise climate change for what it is. A new study shows it’s a current and ongoing threat to our standard of living.
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Tim Raupach @timraupach.com · 09/06/2026
Interesting example of a compounding event - March 2025 in Türkiye was so warm that fruit trees flowered early. Then hailstorms and cold temperatures came in April. Fruit crops were ruined and prices doubled for months. From this paper by @regclimo.bsky.social et al: www.nature.com/articles/s43...
nature.com
Compound weather and climate events in 2025
Nature Reviews Earth & Environment - Compound weather and climate events in 2025
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Tim Raupach @timraupach.com · 09/06/2026
This is an excellent recap of compound weather and climate events in 2025. It is also a great explainer of the different types of compounding that can occur, with strong examples. www.nature.com/articles/s43...
nature.com
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Reposted by Tim Raupach
ARC 21st Century Weather @21stcenturyweather.bsky.social · 04/06/2026
New research led by Tim Raupach and Steven Sherwood and published in Nature Climate Change suggests the atmospheric conditions that favour hail formation are shifting towards cooler regions and cooler times of the year. For more: 21centuryweather.org.au/hail-conditi...
21centuryweather.org.au
Climate change shifting hail risk towards winter crops
Hail conditions on the move as winter crops face rising risk New research led by UNSW suggests that as the climate warms, the conditions that produce hailstorms are drifting towards the poles, leaving...
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Reposted by Tim Raupach
UNSW Climate Change Research Centre @ccrc.bsky.social · 04/06/2026
Where will hail risk increase in a warmer world? A new Nature Climate Change study by CCRC & ICRR researchers finds hail-prone conditions are shifting poleward, with winter hail risk projected to increase in some agricultural regions.
nature.com
Shifting hail hazard under global warming and effects on crop hail risk - Nature Climate Change
How hailstorms change with warming is not well understood. Here the authors use global projections with different hail proxies to show that hail-prone conditions shift polewards under warming, also sh...
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Tim Raupach @timraupach.com · 03/06/2026
In our new paper in Nature Climate Change, we show that hail conditions are projected to shift poleward with climate change, and that summer decreases and winter increases in hail hazard mean that winter crops may face rising risks from hail. www.nature.com/articles/s41...
nature.com
Shifting hail hazard under global warming and effects on crop hail risk - Nature Climate Change
How hailstorms change with warming is not well understood. Here the authors use global projections with different hail proxies to show that hail-prone conditions shift polewards under warming, also sh...
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Tim Raupach @timraupach.com · 29/05/2026
It's a good day when there's a new @boardsofcanada.bsky.social album out.
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Tim Raupach @timraupach.com · 28/05/2026
Important new hail work by Zhang et al., in @nature.com today. Under warming scenarios globally, large hailstones become more frequent and smaller hailstones decline (with regional variation). Another reminder that reducing greenhouse gas emissions is imperative for a safer future. rdcu.be/fk8Fd
rdcu.be
Rising global hail damage potential in a warming world
Nature - Hailstone trajectory simulations conducted under historical and future scenarios show a shift towards larger hailstones, resulting in global hailstorm-induced damage potential increasing...
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Tim Raupach @timraupach.com · 05/05/2026
Our poster session for #EGU26 ITS4.4 is very active with lots of great discussion - interdisciplinary science from flooding rain, hail, to heat stress and financial risk.
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Tim Raupach @timraupach.com · 05/05/2026
Finishing up the talks for ITS4.4 at #EGU26, Jung-Ching Kan talks about heat impact forecasts for Sweden using machine learning.
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Tim Raupach @timraupach.com · 05/05/2026
Nicolò Ardenghi now tells us about decision-making for managing important climate risks in Venice, in ITS4.4 at #EGU26.
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Tim Raupach @timraupach.com · 05/05/2026
Staying in finance at ITS4.4, Marco Maneta now joins us online to talk about climate risk financial modeling. #EGU26
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Tim Raupach @timraupach.com · 05/05/2026
Moving to the financial sector in ITS4.4 at #EGU26, we now have Chiara Cagnazzo talking about the @ecmwf.int C3S climate services for assessing physical climate risk.
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Tim Raupach @timraupach.com · 05/05/2026
Till Sterzel now presents work on urban-planning adaptation under climate change, in ITS4.4 at #EGU26.
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Tim Raupach @timraupach.com · 05/05/2026
Now in ITS4.4 at #EGU26, Sebastian Vicuña tells us about climate change risks in semi-arid coastal basins with a focus on Chile.
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Tim Raupach @timraupach.com · 05/05/2026
Next in ITS4.4 at #EGU26, @lucialayr.bsky.social presents her work on taking future climate projections into account in post-fire management.
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Tim Raupach @timraupach.com · 05/05/2026
Our session ITS4.4 on interdisciplinary approaches to complex climate risks is getting underway at #EGU26. First up Nicole van Maanen talks about challenges (and solutions) for comprehensive risk management. Excellent turnout for a morning session too!
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Tim Raupach @timraupach.com · 04/05/2026
On Tuesday afternoon in AS1.7 at #EGU26 I'm presenting my work with Sarah Bang and John Allen on simulations of satellite-detected hail events in the Australian tropics. meetingorganizer.copernicus.org/EGU26/EGU26-...
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Tim Raupach @timraupach.com · 04/05/2026
Tuesday at #EGU26, Ben Newell, @janalbrecht.bsky.social, @vitusbenson.bsky.social and I co-convene ITS4.4 "Interdisciplinary approaches to addressing complex climate risks". Our exciting lineup has research on extremes and decision-making from fire to hail. Talks 8.30 in -2.62, posters 10.45 in X5.
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Tim Raupach @timraupach.com · 03/05/2026
I’m excited to be on the way to #EGU26! So much amazing science to discuss. I’m talking on Tuesday about hailstorms in the tropics - here’s some convective activity in that neighborhood I saw on the way.
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Tim Raupach @timraupach.com · 28/04/2026
It's funny how often AI summaries of online meetings start with "the meeting began with a discussion of connection difficulties that were then resolved"
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Tim Raupach @timraupach.com · 20/04/2026
I had a great time talking with @sarahinscience.bsky.social and @instrachan.bsky.social about Twister on the @21stcenturyweather.bsky.social podcast Totally Cooked. How I wish we could fully analyse rolling data in real time like the scientists in the film! open.spotify.com/episode/3u8N...
open.spotify.com
Movie Special Twister (1996)
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Tim Raupach @timraupach.com · 10/04/2026
New paper! It's hard to test convective schemes in weather models because we lack reliable ground truth on how they "should" act. Here, we attempted to quantify how schemes should respond to small changes in temperature and humidity. agupubs.onlinelibrary.wiley.com/doi/10.1029/...
agupubs.onlinelibrary.wiley.com
Responses to Humidity and Temperature Perturbations in High‐Resolution Simulations of Convection
Time-averaged responses to local humidity and temperature perturbations in idealized models at cloud-resolving resolutions were studied For the two models examined, accurate simulation of convect...
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Tim Raupach @timraupach.com · 30/03/2026
We have an open postdoc position at @ccrc.bsky.social. This postdoc will work with @jasonpevans.bsky.social, Fiona Johnson, and me, together with partner organisations NSW DCEEW and @nswses.bsky.social, on rainfall extremes and flooding. external-careers.jobs.unsw.edu.au/cw/en/job/53...
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Tim Raupach @timraupach.com · 26/03/2026
I had a great time representing UNSW Science at Science Meets Parliament #SMP2026 in Canberra, from friendly meetings with parliamentarians to learning about all the ways everyone can have their say in our democracy. A great opportunity to learn and share.
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Tim Raupach @timraupach.com · 12/03/2026
The "largest ever" oil disruption should be another strong reminder that renewables are not only the right choice for reducing emissions but also crucial for energy independence. www.nytimes.com/2026/03/12/w...
nytimes.com
Iran War Causing Largest Ever Oil Disruption, I.E.A. Says
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Tim Raupach @timraupach.com · 06/03/2026
A reminder that I maintain a starter pack of scientists on Bluesky who are working on extreme weather and climate. If I'm missing you (or someone else) please let me know! go.bsky.app/8PWHjpx
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Tim Raupach @timraupach.com · 05/03/2026
This is great - hundreds of spectacular cross-section photos and linked 3D models for hailstones in Australia, from the UQ Hail Library www.flickr.com/people/uq-ha.... Thanks @joshuasoderholm.bsky.social for making this library and making it open access!
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Tim Raupach @timraupach.com · 26/02/2026
Over years I've honed some python functions to flexibly plot spatial data from xarray using cartopy and matplotlib. I've now uploaded this code and a demo notebook to GitHub under CC-BY-NC-4.0: github.com/traupach/plo...
github.com
GitHub - traupach/plotmap: Functions to aid in plotting maps with matplotlib and cartopy
Functions to aid in plotting maps with matplotlib and cartopy - traupach/plotmap
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Tim Raupach @timraupach.com · 16/02/2026
Great to be in sunny Hobart in lutruwita/Tasmania for the @amosupdates.bsky.social 2026 meeting. Here’s the gorgeous view from kunanyi/Mt Wellington yesterday. The very apt #AMOS2026 conference theme is “southern skies, southern oceans: science on the edge”.
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Tim Raupach @timraupach.com · 14/02/2026
Entomology departments should offer degrees in pure moths.
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Tim Raupach @timraupach.com · 12/02/2026
Trump repealing the endangerment finding that greenhouse gas emissions pose a risk to human health is like saying that smoking does not cause cancer. It's a short-sighted decision that openly values corporate wealth over the health and wellbeing of the people of the world.
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Tim Raupach @timraupach.com · 04/02/2026
Frontiers ebook "Concept Papers from the World Climate Research Programme: The Future of Climate Research". A collection of forward-looking papers on a variety of climate topics, including our article, led by @janasillmann.bsky.social, on climate extremes & risks. www.frontiersin.org/research-top...
frontiersin.org
Concept Papers from the World Climate Research Programme: The Future of Climate Research
This collection of journal articles reflects the diverse and comprehensive landscape of contemporary climate science and looks into the future of the subject. Ranging from the historical foundations t...
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