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Acacia Pepler

@acaciapepler

Climate scientist interested in how weather systems and their impacts are changing in a changing climate

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19.09.2023
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Latest posts by Acacia Pepler @acaciapepler

After a busy week of inspiring science and socialising in nipaluna/Hobart, it's nice to finally rest on the couch with the cats. #AMOS2026 was fantastic as always, one of my favourite weeks of the year! @amosupdates.bsky.social

20.02.2026 10:27 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Is the Australian storm track shifting south? - Climate Dynamics Climate Dynamics - Cool season rainfall has declined in recent decades in many areas of the southern hemisphere subtropics and midlatitudes including parts of southern Australia. This has been...

It took a loooooong time but it's finally out!

We argue that the winter storm track isn't actually "shifting south". Rather, the cool season drying in southeast Australia is linked to a weakening of the northern edge (while the core stays put & intensifies).
link.springer.com/article/10.1...

19.02.2026 19:49 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

When I review papers it's always something I bring up because rainbow palettes are still suuuuper common but shouldn't be!

18.02.2026 10:14 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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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 β€œsouthern skies, southern oceans: science on the edge”.

16.02.2026 00:18 πŸ‘ 12 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0

I know it’s intentional but we should stop calling everything AI, lumping useful machine learning techniques for science with large language models that tech companies are trying to cram into everything.

05.02.2026 09:00 πŸ‘ 650 πŸ” 207 πŸ’¬ 14 πŸ“Œ 11

If you're interested in how extratropical lows are changing in Australia as the world warms, there's a short summary of some recent research on the BoM website: www.bom.gov.au/news-and-med...

01.02.2026 21:18 πŸ‘ 4 πŸ” 1 πŸ’¬ 0 πŸ“Œ 1

And I made a little web app where you can go and download monthly precipitation time series data from your location of choice (as long as it's in Australia) wateriso-aus.shinyapps.io/apic/

22.01.2026 22:16 πŸ‘ 5 πŸ” 3 πŸ’¬ 1 πŸ“Œ 0
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As the world warms, extreme rain events are coming hard and fast When it comes to extreme rainfall, it's hard for climate scientists to say what's natural and what's caused by climate change, but they do know the most extreme events are dropping more rain, more oft...

"Observations show that across the globe, the heaviest daily rainfall events are averaging about 8 or 9 per cent more rain today than before the pre-industrial era"
www.abc.net.au/news/2026-01...

18.01.2026 10:02 πŸ‘ 26 πŸ” 20 πŸ’¬ 1 πŸ“Œ 0

I read LotR for the first time when I was 11 and it was lifechanging, I hope it is for him too! Can't wait until my 7yo is ready for it (and all my other childhood favourites).

30.12.2025 11:37 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

One small highlight of 2025: I managed to read 133 books, my highest total since 2016 (not counting all the books read to children). Mostly SFF of course!

I suspect I'll read fewer next year, as it feels like time to reread LotR.

30.12.2025 10:18 πŸ‘ 7 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0

Given how much money we have to pay journals to publish papers, you would think they could at least manage to hire support staff with reading comprehension or customer support who actually answer emails *grumble mutter whinge*

27.12.2025 10:26 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Research Scientist in Historical Windstorms:Whiteknights Reading UK Full time, fixed term contract (up to 36 months)

Looking for postdoc positions in the UK studying weather extremes?

Two jobs with deadline 4th Jan:

Historical windstorms, working with two insurance companies: jobs.reading.ac.uk/Job/JobDetai...

Storylines of extreme events, as part of a European collaboration: jobs.reading.ac.uk/Job/JobDetai...

27.12.2025 08:35 πŸ‘ 32 πŸ” 24 πŸ’¬ 0 πŸ“Œ 1

Wrote this ages ago, still relevant
www.scientificamerican.com/blog/hot-pla...

22.12.2025 14:53 πŸ‘ 77 πŸ” 19 πŸ’¬ 4 πŸ“Œ 0
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Meteorology and Climate of the Southern Hemisphere | Cambridge University Press & Assessment

Exciting news πŸŽ‰ Our CCRC scientist AndrΓ©a Taschetto and team have just released β€œMeteorology and Climate of the Southern Hemisphere” book, an updated edition of David Karoly’s 1998 monograph, published by Cambridge University Press. +
Available at lnkd.in/g4SFsM9k

www.cambridge.org/au/universit...

19.12.2025 02:46 πŸ‘ 11 πŸ” 5 πŸ’¬ 1 πŸ“Œ 2

What's NCAR? and 8 ways it has helped you

www.forbes.com/sites/marsha...

18.12.2025 22:47 πŸ‘ 80 πŸ” 52 πŸ’¬ 3 πŸ“Œ 1
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Climate impacts of the El NiΓ±o–Southern Oscillation on Australia Nature Reviews Earth & Environment - El NiΓ±o–Southern Oscillation (ENSO) profoundly affects Australian weather, climate, ecosystems and socio-economic sectors. This Review presents...

🚨New paper
CCRC scientist Andrea Taschetto and team have published a comprehensive review of ENSO impacts in Australia in @natrevearthenviron.nature.com. This is an important and long-overdue synthesis, building on foundational studies such as McBride & Nicholls (1983). ++

09.12.2025 03:19 πŸ‘ 11 πŸ” 6 πŸ’¬ 1 πŸ“Œ 0
Research Management System - Scheme Round Statistics for Approved Applications - ARC Centres of Excellence 2026 round 1 RMS is the ARC's Research Management System, a web-based system used by eligible researchers to prepare and submit research proposals and assessments under the ARC National Competitive Grants Program ...

Not every day we get 35 x 10⁢ AUD for ocean research.

rms.arc.gov.au/RMS/Report/D...

Excellent job from Our Future Oceans team! 🌊

Congrats @profmattengland.bsky.social, @adele-morrison.bsky.social, @andyhogg.bsky.social, @janzika.bsky.social, @nicolamaher.bsky.social and many more!!!

09.12.2025 00:31 πŸ‘ 24 πŸ” 5 πŸ’¬ 0 πŸ“Œ 0

Watch to the end. Mother Nature is not messing around

07.12.2025 01:43 πŸ‘ 206 πŸ” 50 πŸ’¬ 8 πŸ“Œ 0
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Storms in the Southern Ocean are producing more rain – and the consequences could be global The Southern Ocean is the engine room of global heat and carbon uptake – and it’s changing faster and more dramatically than we thought.

🌊 Storms in the Southern Ocean are producing more rain

πŸ‘‰ 28% rainfall increase (vs ERA5’s 8%)
πŸ‘‰ Storm rain intensity up
πŸ‘‰ ~2,300 Gt/yr extra freshwater in 2023
πŸ‘‰ Ocean β€œcooling by evaporation” up 10–15%

One of Earth’s key climate buffers is shifting.

theconversation.com/storms-in-th...

05.12.2025 05:47 πŸ‘ 16 πŸ” 10 πŸ’¬ 0 πŸ“Œ 0
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Southern Annular Mode dynamics, projections and impacts in a changing climate - Nature Reviews Earth & Environment The Southern Annular Mode (SAM) has shifted towards its positive phase owing to ozone depletion and increasing greenhouse gas concentrations. This Review discusses the dynamics, trends and projections...

New review led by @ariaan.bsky.social on climate effects of the Southern Annular Mode, the most important mode of climate variability in the Southern Hemisphere. Read it in @natrevearthenviron.nature.com at doi.org/10.1038/s430... πŸ§ͺ #academicsky #climate #climatechange

02.12.2025 05:11 πŸ‘ 27 πŸ” 7 πŸ’¬ 2 πŸ“Œ 1

It's always nice as a scientist to see datasets you developed years ago are still being used to do useful things. But when planning future research it's hard to decide when it's valuable to update old datasets/analyses using new models etc, vs moving on and doing something new (thus higher impact).

01.12.2025 04:30 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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BAMOS Vol 38 Q4 Nov 2025 BAMOS Vol 38 Q4 Nov 2025 | Page 6 The Bulletin of the Australian Meteorological and Oceanographic Society BAMOS Vol 38 Q4 Nov 2025 Highlights include: - Another Sudden Stratospheric Warming in 2025; - 2025 ACCESS Community Workshop:...

In the latest edition of the Bulletin of the Australian Meteorological and Oceanographic Society, I am taking another look at this year's Sudden Stratospheric Warming. I think it had more of an impact than I thought it would back in September. viewer.joomag.com/bamos-vol-38...

28.11.2025 04:20 πŸ‘ 5 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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New research from our team! We identify places where the hottest temperature on record is not particularly severe compared to what is possible (a.k.a "soft records"). rmets.onlinelibrary.wiley.com/doi/10.1002/...

28.11.2025 09:56 πŸ‘ 7 πŸ” 5 πŸ’¬ 1 πŸ“Œ 0

Ahhhh, the relief when you've been anxiously waiting the reviews of a paper for 6 months and they finally come back as minor revisions. Having this paper completely finished with by the end of the year will be an excellent Christmas present!

27.11.2025 10:41 πŸ‘ 5 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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β€œWhy Are We Funding This?” Long-standing myths about β€œsilly science” have contributed to the reckless slashing of government-supported research.

Every year around Thanksgiving, I see tons of grad students post heartbreaking messages on social media about how their loved ones don’t understand or support their decision to study what seems like something pointless or silly.

Perhaps my American Scientist essay can help!

πŸ§ͺπŸŒŽπŸ¦‘ #SciComm

25.11.2025 18:42 πŸ‘ 350 πŸ” 164 πŸ’¬ 8 πŸ“Œ 11

Or directly at the journal via the correct link doi.org/10.1175/JCLI... πŸ˜†

12.11.2025 00:19 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Compound Wet/Windy Extremes in Australian Observational and Reanalysis Datasets - NESP 2 climate The co-occurrence of extreme rain with extreme wind can result in enhanced impacts, and there is interest in understanding their occurrence, drivers, and potential changes....

If you're interested in all the details, the paper is open access at nesp2climate.com.au/resource/com.... The next stage is working with people in the emergency services and energy sectors to improve our methods, I'll be talking on this at #MODSIM2025 nesp2climate.com.au/research/ext...

12.11.2025 00:02 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Gone with the wind… and the rain - NESP 2 climate When a location experiences both extreme wind and extreme rainfall around the same time, the likelihood of fallen trees, power outages, and damage to houses...

One thing I've been working on for the last year or so is trying to better understand how strong winds and heavy rainfall interact to cause enhanced impacts on Australians, and which datasets we need to use to identify them properly.

Read about my new paper here: nesp2climate.com.au/gone-with-th...

11.11.2025 23:59 πŸ‘ 5 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0
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a penguin holding a brain with the words hey you dropped this ALT: a penguin holding a brain with the words hey you dropped this

Note from an irritated editor: AI is starting to infiltrate peer review, or at least it looks a lot like it. If you’re planning to use an LLM to review someone else’s work for a journal, rather just don’t accept the review invitation. It’s easy.

11.11.2025 18:38 πŸ‘ 29 πŸ” 6 πŸ’¬ 2 πŸ“Œ 0
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Insurance Australia Group (IAG) Severe Weather in a Changing Climate report
www.iag.com.au/severe-weath...
β€œThe report complements Australia’s National Climate Risk Assessment (2025) … together with anticipated impacts for the finance & insurance industry.”
Key Planning Recommendations are given

05.11.2025 21:29 πŸ‘ 7 πŸ” 9 πŸ’¬ 1 πŸ“Œ 3