Nico Jourdain
@nicojourdain.bsky.social
CNRS researcher at IGE, Grenoble, France, working on the Antarctic Ice Sheet and its interactions with the climate system, sea level rise.
Hi! Can you add @climateclara.bsky.social and myself, both working on Antarctica ? Thanks a lot for this list!
November 11, 2025 at 11:05 AM
Hi! Can you add @climateclara.bsky.social and myself, both working on Antarctica ? Thanks a lot for this list!
Reposted by Nico Jourdain
On a related topic, we have recently published a preprint of our own work on the bistability of ocean circulation in a box model of ice-shelf cavities: doi.org/10.22541/ess...
PhD work of Louis Saddier, with Chris Bull and Louis Couston.
PhD work of Louis Saddier, with Chris Bull and Louis Couston.
Irreversible Transitions of the Ocean Circulation in Antarctic Ice-Shelf Cavities
Ice shelves fringing the Antarctic continent experience low or high basal melt rates depending on local shelf conditions, ocean circulation and intensity of ice-sea-air exchanges. Recent studies have ...
doi.org
November 6, 2025 at 8:59 AM
On a related topic, we have recently published a preprint of our own work on the bistability of ocean circulation in a box model of ice-shelf cavities: doi.org/10.22541/ess...
PhD work of Louis Saddier, with Chris Bull and Louis Couston.
PhD work of Louis Saddier, with Chris Bull and Louis Couston.
... @oceaniceeu.bsky.social @optimesm-eu.bsky.social @crices-h2020.bsky.social and the long-term support of @cnrs-insu.bsky.social @ugrenoblealpes.bsky.social and @igegrenoble.bsky.social
November 4, 2025 at 6:38 AM
... @oceaniceeu.bsky.social @optimesm-eu.bsky.social @crices-h2020.bsky.social and the long-term support of @cnrs-insu.bsky.social @ugrenoblealpes.bsky.social and @igegrenoble.bsky.social
6- This research was made possible thanks to the leadership of @climateclara.bsky.social, the strong involvement of several talented early career researchers, to a perfect alignment of circumstances in terms of project funding: pepr-traccs.fr anr-aiai.github.io @h2020protect.bsky.social ...
PEPR TRACCS : Transformer la modélisation du climat
Le programme de recherche TRACCS vise à accélérer le développement des modèles de climat pour répondre aux attentes sociétales.
pepr-traccs.fr
November 4, 2025 at 6:38 AM
6- This research was made possible thanks to the leadership of @climateclara.bsky.social, the strong involvement of several talented early career researchers, to a perfect alignment of circumstances in terms of project funding: pepr-traccs.fr anr-aiai.github.io @h2020protect.bsky.social ...
5- Ongoing research and more observations should allow refining these estimates in the coming years. Hopefully, the community will be able to project the fate of ice shelves, their melting, fracturing, calving, and climatic feedbacks, before Antarctica becomes like Greenland doi.org/10.1038/s415...
The Greenlandification of Antarctica - Nature Geoscience
Climate and ice sheet processes in Antarctica increasingly reflect those observed earlier in Greenland. Applying process insights from Greenland can improve projections of future Antarctic ice and cli...
doi.org
November 4, 2025 at 6:38 AM
5- Ongoing research and more observations should allow refining these estimates in the coming years. Hopefully, the community will be able to project the fate of ice shelves, their melting, fracturing, calving, and climatic feedbacks, before Antarctica becomes like Greenland doi.org/10.1038/s415...
4- That ice shelves prone to marine ice-sheet instability (PIG, Thwaites, Totten, Moscow) don’t become likely non-viable by 2300 may seem surprising. This is due to temporary increase in grounding line flux when ice shelf weakens and to our conservative assumptions regarding ice dynamics & calving.
November 4, 2025 at 6:38 AM
4- That ice shelves prone to marine ice-sheet instability (PIG, Thwaites, Totten, Moscow) don’t become likely non-viable by 2300 may seem surprising. This is due to temporary increase in grounding line flux when ice shelf weakens and to our conservative assumptions regarding ice dynamics & calving.
3- The dates of non-viability in SSP585 may seem very far away given the ongoing changes and extreme projected warming. This is when we are very confident that there is no way ice shelves remain stable while accounting for deep uncertainty on many processes. The actual break-up should occur before.
November 4, 2025 at 6:38 AM
3- The dates of non-viability in SSP585 may seem very far away given the ongoing changes and extreme projected warming. This is when we are very confident that there is no way ice shelves remain stable while accounting for deep uncertainty on many processes. The actual break-up should occur before.
2- What does it mean that most ice shelves are NOT non-viable in SSP126? It means that given the uncertainty on the evolution of ice dynamics, iceberg calving, basal melting, and surface mass balance, there is some probability that ice shelves keep their current extent for several centuries.
November 4, 2025 at 6:38 AM
2- What does it mean that most ice shelves are NOT non-viable in SSP126? It means that given the uncertainty on the evolution of ice dynamics, iceberg calving, basal melting, and surface mass balance, there is some probability that ice shelves keep their current extent for several centuries.
Reposted by Nico Jourdain
A link to access the full paper: rdcu.be/eNkZa
Ocean warming threatens the viability of 60% of Antarctic ice shelves
Nature - The viability of Antarctic ice shelves under low rates and high rates of global warming is modelled to estimate when it will become unfeasible for the ice shelves to maintain their...
rdcu.be
October 29, 2025 at 5:22 PM
A link to access the full paper: rdcu.be/eNkZa