Melt and circulation change with the new parameterisation, and there are still many uncertainties. But we are hopefully one step closer to accurate melt predictions across Antarctica!
Thanks to @mad-ros.bsky.social @adele-morrison.bsky.social @andyhogg.bsky.social and Yoshihiro Nakayama!
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...
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More info in the thread
I am thrilled to share this multimedia story highlighting my experience on the #Denman Marine Voyage earlier this year, alongside the inspiring work of 3 other Antarctic scientists:
news.unsw.edu.au/en/breaking-...
✍️ @melissalyne.bsky.social
🌊🇦🇶 #DMV @antarcticsciaus.bsky.social @ccrc.bsky.social
🚨 New paper alert 🚨
We developed the new PanAntarctic model and assessed the sensitivity of Antarctic Bottom Water (AABW) formation and export to horizontal model resolutions of 1/10°, 1/20° and 1/40°.
Open access paper in JAMES:
doi.org/10.1029/2024...
Beneath ice shelves, meltwater sits above the rest of the ocean. In some conditions, stratification suppresses the boundary layer turbulence that parameterisations assume is driving melt. We tested a new parameterisation with this stratification-melting feedback, previously not fully accounted for.
🌏 Better models = better climate predictions.
A new paper led by ACEAS PhD researcher Claire Yung (ANU) shows how a refined equation used in ocean models can significantly improve the accuracy of Antarctic ice shelf melt predictions.
➡️ antarctic.org.au/new-model-co...
New today: Critical research published in @nature.com on the abrupt and alarming changes being observed in #Antarctica and the surrounding Southern Ocean, led by Prof. @climatenerilie.bsky.social, with @profmattengland.bsky.social and colleagues ⬇️
theconversation.com/from-sea-ice...
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.
🌊❄️🧪 🇦🇶 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)
Nice summary of the importance of Antarctica's ice shelves and how little we know about them. Major differences between models of present day ice shelf melt need to be resolved.
Paper here tc.copernicus.org/articles/19/...