Andy Hogg
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andyhogg.bsky.social
Andy Hogg
@andyhogg.bsky.social
Director of ACCESS-NRI, Ocean Modeller at the ANU
Reposted by Andy Hogg
Our paper on a new ice shelf basal melt parameterisation is out! tc.copernicus.org/articles/19/...
Small-scale processes in the ocean drive ice shelf basal melt, and large-scale ocean models can’t resolve these processes. Therefore, models use melt parameterisations, but these can still be improved.
Stratified suppression of turbulence in an ice shelf basal melt parameterisation
Abstract. Ocean-driven basal melting of Antarctic ice shelves is an important process that affects the Antarctic Ice Sheet, global climate and sea level. Basal melting is controlled by small-scale pro...
tc.copernicus.org
November 20, 2025 at 8:41 AM
Reposted by Andy Hogg
ANU colleagues and students - please share this post if you can:

The ANU governance project has extended our deadline to comment on the Draft report to next week - 7 October.

Here's a link to a feedback form, which also contains the link to the draft report:

docs.google.com/forms/d/e/1F...
Feedback on ANU Governance Project Draft Report
The ANU Governance Project Working Group are proud to present the Draft Project Report for community feedback and consultation. The Draft Project Report is available on our website or through THIS LINK. Using a process that has involved deep listening and a participatory and deliberative process across the ANU community, we have compiled a unique and valuable body of evidence that documents what’s wrong with governance at the ANU and charts a way forward to help rebuild trust and to deliver best practice governance. Over 600 ANU staff, students, and stakeholders have participated in this project, and in contributing constructively to the future of ANU. This includes 590 members of the community who participated in our survey, 75 who participated in one-hour small group discussions, and over 40 from across the university who participated in our project workshop. The ANU community told us there a critical need for change: Over 96% of survey respondents and all discussion group participants believe current ANU governance is not fit for purpose and should be reformed. Over 92% of survey respondents and all discussion group participants expressed dissatisfaction with current ANU governance. Over 93% of survey respondents said they were dissatisfied with current practices of transparency at the ANU. Over 93% of survey respondents said they were dissatisfied with accountability frameworks at the ANU. The ANU Community has proposed the following near-term steps forward for a reformed ANU: Council must direct Finance to produce and publish a current budget breakdown. Council must revise and publish selection criteria for Executive positions. Council meetings must immediately be made fully accessible to the community. Academic Board must regularly review and assess the financial decisions of senior executives and Council. Commence senior leadership listening tours with the ANU community. Additional recommendations forwarded by the community are summarised in the full report, including a proposal to co-design legislative reform of the ANU Act with the community. The Working Group invites the ANU community and stakeholders to offer feedback via this form on the draft report by midnight on Tuesday 7 October. This deadline has been extended in order to allow us more time to hear and incorporate community feedback ahead of the release of our final report on Monday 20 October.
docs.google.com
September 29, 2025 at 4:19 AM
Reposted by Andy Hogg
ANU people - please share! The ANU governance project has a media release about the presentation by the Interim Vice Chancellor's speech on Thursday here: drive.google.com/file/d/1oGH5...
September 19, 2025 at 11:25 PM
Reposted by Andy Hogg
📣 Job opportunity 📣
Come work with us at Monash as a 3yr Research Fellow on ice sheet-atmosphere coupling!

You'll sit within @arcsaef.bsky.social and be part of the @access-nri.bsky.social ice sheets team, pushing frontiers in Earth System Modelling ❄️🇦🇶

👉 careers.pageuppeople.com/513/cw/en/jo...
Job Search
careers.pageuppeople.com
July 26, 2025 at 11:24 AM
Reposted by Andy Hogg
We figured out a cheap-ish way to make ocean models create Dense Shelf Waters (DSW) on the surface of the Antarctic continental shelf! How?
Fast answer: Ocean surface cells thinner than 1 m!
Long answer on the paper: dx.doi.org/10.1029/2024...
----
More info in the thread
Antarctic Dense Water Formation Sensitivity to Ocean Surface Cell Thickness
The ability of ocean models with depth coordinates to form Antarctic Dense Shelf Water (DSW) depends on their surface vertical resolution Deeper surface cells shift the direction of surface Ekman...
dx.doi.org
July 25, 2025 at 2:54 AM
Reposted by Andy Hogg
🌊❄️🧪 🇦🇶 Please share:

We have learned that the National Science Foundation is moving ahead with plans to decommission the U.S. Research Vessel/Ice Breaker Nathaniel B. Palmer this October.

If you care about Antarctic research, please read on (1/n)
July 25, 2025 at 7:50 PM
Reposted by Andy Hogg
Hurry up! Abstract submissions are closing on the 15 June 2025.
✍️Submit your abstract now: bit.ly/457DqOn
🔖Abstract guidelines: bit.ly/4kgj6yP
🌏More: bit.ly/3YRL3V5
If you are using ACCESS model output for your research or running or developing the models, we would like to hear from you! Everyone is welcome, especially students and Early Career Researchers.
✍️Submit your abstract now: bit.ly/457DqOn
🔖Abstract guidelines: bit.ly/4kgj6yP
🌏More: bit.ly/3YRL3V5
June 6, 2025 at 4:51 AM
Reposted by Andy Hogg
This is horrible. I don't even know what to say. Some of our most key polar data.

"As a result, the level of services for affected products below will be reduced to Basic—meaning they will remain accessible but may not be actively maintained, updated, or fully supported."

nsidc.org/data/user-re...
May 6, 2025 at 8:08 PM
Reposted by Andy Hogg
“You can tariff our fish, but you will never take..Our FREEDOMMM!!

-William Walrus, Militant leader of McDonald Island
April 5, 2025 at 10:18 PM
Reposted by Andy Hogg
Reposted by Andy Hogg
One of the people fired from NOAA today is the director of the Ocean Acidification Program. That program also leads the U.S. government's effort on marine carbon dioxide removal (mCDR). The destruction of American science is incomprehensible.
Home - NOAA Ocean Acidification Program
NOAA's Ocean Acidification Program prepares us for the impacts of ocean acidification through research and interdisciplinary partnerships.
oceanacidification.noaa.gov
February 27, 2025 at 11:31 PM
Reposted by Andy Hogg
A fantastic and insightful article in about the difference between climate and weather models by Australia's climate simulator @andyhogg.bsky.social, Aidan Heerdegen and Kelsey Druken! showing why without these models we would by flying blind. #NCRISImpact #ACCESSImpact
Weather and climate models are both governed by the same physical processes. But there most of the similarities end.
What’s the difference between climate and weather models? It all comes down to chaos
theconversation.com
February 6, 2025 at 12:11 AM
Reposted by Andy Hogg
🤓 in just 6 years, australia's two main grids added 51 TWh/yr of wind+solar generation.

…taking us from 19.9% → 38.8% renewables.

…this is equivalent to 6.6 large #nuclear reactors, but at much lower cost & much faster.

…even more impressive given there's no chance of nuclear here for 20+ years.
January 1, 2025 at 6:57 AM
Reposted by Andy Hogg
The global ocean is at record high surface ocean temperatures

Large parts of the tropical ocean are the warmest ever and the global ocean has spent the last SIX weeks above 21ºC

Find out more
pulse.climate.copernicus.eu
#climateaction #climatecrisis 🧪⚒️🌍
March 18, 2024 at 7:34 AM
Reposted by Andy Hogg
March 11, 2024 at 11:09 PM
Reposted by Andy Hogg
For the oceanographers, a new WOA is out! The first since 2018.

www.ncei.noaa.gov/news/World-O...
World Ocean Atlas 2023
The Ocean Climate Laboratory released World Ocean Atlas 2023—Global Climatologies of Temperature, Salinity, Dissolved Oxygen, and Inorganic Nutrients.
www.ncei.noaa.gov
March 6, 2024 at 3:29 PM
Reposted by Andy Hogg
Ready to submit your manuscript but unsure which journal? At non-profit society journals like AGU’s JGR-Oceans your dollars support ethical and rigorous peer review, ECR mentoring programs, conferences, education on equitable practices, fee waivers and so much more. Welcome to your community!
January 20, 2024 at 7:36 PM
Reposted by Andy Hogg
Sea ice is very different to fresh ice, and incredibly difficult to represent accurately in climate models. With the new sea ice facility in the CFP Lab, we can grow sea ice in controlled conditions and unlock its mysteries.
November 1, 2023 at 9:00 PM