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Historical holes: Beneath the surface, caves hold the key to Australia’s wildfire history

My colleague @michcampbell recently held a postdoctoral research grant from AINSE. They've just released this 2025 Research Spotlight for early career researcher awardees all about her fire research. I think this is nicely done. If you'd like to know how caves and cave stalagmites can be used to reconstruct records of past fires, here's the article

andy-baker.org/2025/04/22/hist

Andy Baker · Historical holes: Beneath the surface, caves hold the key to Australia’s wildfire history
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🚨 New preprint 🚨

Hydrology and cave (and cave hydrology!) enthusiasts may enjoy this preprint just posted today for community review in the #EGU journal #HESS. Led by former #UNSW student, Christina Song, with @Andbaker and myself, we looked at recharge thresholds (amount of precipitation needed for recharge to occur in a cave), and how they changed after a fire.

egusphere.copernicus.org/prepr

The preprint is open now for community discussion, and will be accepting comments until 23 April.

egusphere.copernicus.orgRainfall recharge thresholds decrease after an intense fire over a near-surface cave at Wombeyan, AustraliaAbstract. Quantifying the amount of rainfall needed to generate groundwater recharge is important for the sustainable management of groundwater resources. Here, we quantify rainfall recharge thresholds using drip loggers situated in a near-surface cave: Wildman’s cave at Wombeyan, southeast Australia. In just over two years of monitoring, 42 potential recharge events were identified in the cave, approximately 4 m below land surface which comprises a 30° slope with 37 % bare rock. Recharge events occurred within 48 hours of rainfall. Using daily precipitation data, the median 48 h rainfall needed to generate recharge was 19.8 mm, without clear seasonal variability. An intense experimental fire experiment was conducted 18 months into the monitoring period: the median 48 h rainfall needed to generate recharge was 22.1 mm before the fire (n=22) and 16.4 mm after the fire (n=20), with the decrease in rainfall recharge most noticeable starting three months after the fire.. Rainfall recharge thresholds and number of potential recharge events at Wildman’s Cave are consistent with those published from other caves in water-limited Australia. At Wildman’s Cave, we infer that soil water storage, combined with the generation of overland flow over bare limestone surfaces is the pathway for water movement to the subsurface via fractures and that these determine the rainfall recharge threshold. Immediately after the fire, surface ash deposits initially retard overland flow, and after ash removal from the land surface, soil loss and damage decrease the available soil water storage capacity, leading to more efficient infiltration and a decreased rainfall recharge threshold.

Postdoctoral position in  climate science at UNSW Sydney

My colleague Andréa Taschetto and I are recruiting. Please share...

Are you familiar with climate model simulations? Are you interested in extreme rainfall events: those that generate groundwater recharge? Are you interested in ENSO?

We are investigating the links between climate drivers such as ENSO, high magnitude rainfall events and groundwater recharge, to help understand how climate drivers affect our groundwater resources.

For more information:
andy-baker.org/2025/01/25/post

Andy Baker · Postdoctoral position in  climate science at UNSW Sydney
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This 'How to spot a rip' exercise from Prof Rob Brander at #UNSW is excellent.

Anyone who spends time at the beach should be able to ID a rip and know what to do if you get caught in one! In the immportal words of Douglas Adams - DON'T PANIC.

Quietly proud that I spotted all the rips, but living my whole life up until now on the coast, it would have been slightly embarrassing not to have!

#Rip #Riptide #beach #SurfLifeSaving #Australia

how-to-spot-a-rip.netlify.app/

The ConversationCan you spot a rip current? Test your knowledge with our interactive quizBe safe this summer by learning the latest rip survival guidelines with this 5-minute quiz.

"UNSW Sydney has initiated a major collaboration with OpenAI, becoming the first university in the Asia-Pacific region to work with the US-based research organisation to deploy ChatGPT Edu."

I am beyond frustrated with the intrusion of LLMs into higher education and even more disappointed that #UNSW has decided to play ball with these companies.

OpenAI is one of the worst polluters of our information ecosystem. We should not be doing business with them.

unsw.edu.au/newsroom/news/2024

UNSW SitesUNSW Sydney signs landmark agreement with OpenAIThe enterprise-level collaboration will allow UNSW researchers, educators and students to use the OpenAI tool ChatGPT Edu securely.

🌟 TUTORIAL DETAILS - , and 🌟

Join us at for a tutorial led by Dr Nicholas I-Hsien Kuo from the UNSW Centre for Big Data Research in Health, Sydney.

🌟 What You’ll Gain 🌟

➡️ Implement and evaluate PEFT and quantisation techniques.

➡️ Fine-tune and deploy LLMs on hardware with limited resources.

➡️ Optimise workflows for real-world applications without sacrificing performance.

🌟 Register now! 🌟
alta2024.alta.asn.au

ALTA 2024The 22nd Annual Workshop of the Australasian Language Technology AssociationCanberraDecember 2 - 4, 2024

Celebrating Australian Laureate Fellowship Recipients

Last week I had the honour of attending the ARC’s annual Laureate Pin Ceremony, celebrating Australian Laureate Fellowship recipients and Industry Laureate Fellowship recipients. It was wonderful to celebrate with family and meet old and new colleagues. I received my pin in Australia's Parliament House in Canberra from the Federal Member for Canberra, Ms Alicia Payne MP. Over the next five years, I will be building a network of collaborators and training early career researchers to tackle the question of groundwater recharge - that is, the replenishment of groundwater.

andy-baker.org/2024/11/16/cele

Andy Baker · Celebrating Australian Laureate Fellowship Recipients
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Two post-doctoral research positions at UNSW Sydney

Would you like to work at UNSW Sydney with myself (Earth and Sustainability Science Research Centre) and colleagues Andrea Taschetto (UNSW Climate Change Research Centre) and Pauline Treble (ANSTO)? We have two positions being advertised now, both related to the Australian Research Council Fellowship project 'Caves and their stalagmites: linking climate to groundwater recharge'.

andy-baker.org/2024/10/31/two-

Andy Baker · Two post-doctoral research positions at UNSW Sydney
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