JB Sallée

YouTube video by Xin Liu The Southern Ocean

#GEOL0022 all you ever wanted to know about the key role of the Southern Ocean in our climate system summarized in a great 5 minutes video by one of my students www.youtube.com/watch?v=f_zZ... Great work Billy Liu 👍.

See credits at the end for inspiration from @jbsallee.bsky.social and others...

🌊

If you think you might be interested to apply to the lecture position, please reach out to me so we can discuss about the qualification step to be done before mid-december.

BUT important: in France to apply for a lecturer position you need to be "qualified to do so" by submitting an application before mid-december (an application to be allowed to apply... 🤯 ... but that's compulsory and important).

I am told that they are looking for someone with an expertise in physical oceanography, and ideally sea-going experience. The application deadline will be in a few months probably in winter-spring time

🚨PERMANENT POSITION OPENING🚨
A lecturer position is opening at LOCEAN on the topic: ‘Impact of climate change on marine ecosystems in the Southern Ocean’ (permanent position with the French Natural History Museum, for a researcher that will be based at LOCEAN, in the centre of Paris).

Increased future ocean heat uptake constrained by Antarctic sea ice extent Abstract. The ocean takes up over 90 % of the excess heat stored in the Earth system as a result of anthropogenic climate change, which has led to sea level rise and an intensification of marine extre...

Future atmospheric and ocean warming over the 21st century might be larger than previously expected based on a new study by @linusvogt.bsky.social

Linus & I developed the idea during Linus research visit with me at @whoi.edu and turned it then into this paper:

esd.copernicus.org/articles/16/...

Increased future ocean heat uptake constrained by Antarctic sea ice extent Abstract. The ocean takes up over 90 % of the excess heat stored in the Earth system as a result of anthropogenic climate change, which has led to sea level rise and an intensification of marine extre...

🚨🌊 New highlight paper out today in Earth System Dynamics!

We find an observational constraint implying more future global ocean heat uptake, cloud feedback, and warming than the CMIP6 mean.

This contrasts with previous estimates based on past warming trends.

🔗 esd.copernicus.org/articles/16/...

Check out this very nice piece of work led by @linusvogt.bsky.social that untangles the processes controlling the efficiency of the world's ocean to capture climate change heat!

Screenshot of Nature opinion piece called Ocean fertilization: time to move on, published in September 2009. The authors are Aaron Strong, Sallie Chisholm, Charles Miller & John Cullen. 🌊 "Adding iron to the ocean is not an effective way to fight climate change, and we don't need further research to establish that, say Aaron Strong, Sallie Chisholm, Charles Miller and John Cullen."

Maybe this @johncullenocean.bsky.social et al. piece where they said — "adding iron to the ocean is not an effective way to fight climate change, and we don't need further research to establish that" — wasn't straightforward enough because this idea just won't die. 🤷🏻‍♂️

www.nature.com/articles/461...

Internal variability effect doped by climate change drove the 2023 marine heat extreme in the North Atlantic Communications Earth & Environment - The 2023 North Atlantic marine heatwave was driven by an extreme phase of internal atmospheric variability but would have been impossible without the doping...

🌊 The N.Atlantic has been experiencing extreme T°C in 2023. This situation raises a number of questions: Have we missed something? Do climate models allow us to understand such an event, or have we entered a new climate regime?
We attempted to answer these questions in this study:
rdcu.be/eh0e8
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Problem is that some colleagues have been so loud in press releases and in open letters saying amoc will collapse and ipcc underestimate the risk, that when you say it will 'only' decline and unlikely collapse (state of our knowledge) sceptics think that there is no pb...

Argo est un programme international qui coordonne la collecte des informations à l'intérieur de l'océan à l'aide d'une flotte d'instruments robotisés. Ces instruments, les flotteurs profileurs, dérivent avec les courants océaniques et se déplacent à la verticale entre la surface et 2000m, 4000m ou le fond des océans. Les données recueillies par Argo décrivent la température et la salinité de l'eau et certains flotteurs mesurent d'autres propriétés qui décrivent la biologie/chimie de l'océan. Le réseau de flotteurs travaille en partenariat avec les satellites d'observation de la Terre, Jason, qui mesurent la forme de la surface de l'océan. Chaque profileur Argo est mis à l'eau depuis un navire. Une fois dans l’eau, le flotteur descend pour se stabiliser vers 1km de profondeur. Dix jours plus tard, le flotteur descend jusqu'à 2, 4 ou 6km de profondeur, puis remonte à la surface. Lors de son ascension vers la surface, les capteurs embarqués s’activent et mesurent les propriétés de l'océan. Arrivé en surface, le flotteur transmet, via des satellites, les données et sa position à des stations de réception à terre. Le flotteur coule ensuite à nouveau pour répéter le cycle de 10 jours jusqu'à ce que ses batteries soient épuisées.

Bonjour,

Connaissez-vous le réseau de profileurs Argo?

C'est une clé de voûte de l'observation de l'océan.

www.argo-france.fr/Argo-France/...

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Two polar stereographic maps side-by-side showing Antarctic sea ice concentration and its anomalies relative to 1981-2010 for February 2025. Red shading is shown for less ice, and blue shading is shown for more ice. More areas are below average than above. Antarctica is masked out in grey shading.

We are at the end of the melt season in the #Antarctic (austral summer), which leaves most of the remaining sea ice across the Weddell Sea region. Here's a look at last month...

+ February ice comparison on my LinkedIn: www.linkedin.com/feed/update/...
+ Data available at nsidc.org/data/g02202/...

NOAA firings hit the birthplace of weather and climate forecasting Dismissed researchers were improving severe weather predictions

Hi - I'd like to share this story of what is happening at NOAA GFDL, where some of my colleagues and I worked until the mass firings at NOAA last week.

"...the birthplace of weather and climate forecasting"

Science at Risk: Protect NOAA Scientists & experts: Add your name to this open letter calling on Congress and the Trump administration to ensure that NOAA and its sub-agencies remain fully funded and staffed, and that the independ...

Scientists & experts: Add your name to this open letter calling on Congress and the Trump administration to ensure that NOAA and its sub-agencies remain fully funded and staffed, and that the independent, trusted science the agency produces is protected. act.ucsusa.org/4kajJuk

PostdocCNRM_Overturning — 2-year Postoc opportunity — The Future Evolution of Global Ocean Overturning Cells at Different Global Warming Levels Deadline for application : 1 April 2025 Supervisors: Jean-Baptiste Sallée, Rola...

🌊 🚨 Postdoc position alert 🚨 🌊

Optimizing Southern Ocean Carbon Sink Observations Using Autonomous Floats ( @bgc-argo.bsky.social )

Supervisors: JB Sallée ; Collaboration: H. Claustre ; P. Landschutzer ; E. McDonagh

Location: IPSL (LOCEAN), Paris, Fr

emploi.cnrs.fr/Offres/CDD/U...

🌊 🚨 Postdoc position alert 🚨 🌊

The Future Evolution of Global Ocean Overturning Cells at Different Global Warming Levels (2 years)

Deadline for application: 1 April 2025
Supervisors: Jean-Baptiste Sallée, Roland Séférian
Location: CNRM, Toulouse, France

More info: docs.google.com/document/d/1...

10 Stefan mentions in his blog that our study “does not change the assessment of the risk and impact of future AMOC changes in response to global warming”. After discussing this further, he confirmed that his view aligns with the IPCC’s medium confidence that the AMOC will not collapse before 2100.

Les chercheurs abasourdis par le déni sur l’effondrement de la biodiversité : « C’est nous qui avons raison, et non les lobbies » Alors que les négociations de la COP16 sur la biodiversité reprennent mardi en Italie, des scientifiques disent leur stupéfaction devant les reculs qui affectent la protection de la nature, mais essai...

www.lemonde.fr/planete/arti...

« Nous appelons à l’organisation d’une convention nationale de l’éthique environnementale de la recherche » TRIBUNE. Tamara Ben Ari et Aude Valade, chercheuses en écologie et agronomie, estiment que les initiatives existantes ne suffisent pas pour dessiner une recherche éthique, alignée avec les impératifs ...

Merci Tamara et Aude @audevalade.bsky.social pour vos efforts très appréciés !
www.lemonde.fr/sciences/art...

« Nous appelons à l’organisation d’une convention nationale de l’éthique environnementale de la recherche » TRIBUNE. Tamara Ben Ari et Aude Valade, chercheuses en écologie et agronomie, estiment que les initiatives existantes ne suffisent pas pour dessiner une recherche éthique, alignée avec les impératifs ...

www.lemonde.fr/sciences/art...

Same for us 🥹 ... Two not popping up

Awesome! Have you tried to fish it?

@glenpeters.bsky.social makes an important point here.

I often ready in 🌊 #mCDR papers: IPCC says we need #CDR to achieve our climate targets, as all scenarios that reach these goals include a certain level of CDR.

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Atlantic overturning inferred from air-sea heat fluxes indicates no decline since the 1960s - Nature Communications The AMOC is crucial for the global ocean overturning circulation and controls the climate around the North Atlantic. Here, the authors use 24 Earth System Models from the CMIP6 to demonstrate tha...

Has the Atlantic Meridional Overturning Circulation (AMOC) weakened over the last decades? In our new study, we combine state-of-the-art CMIP6 models and observation-based estimates of the air-sea heat flux in the North Atlantic to show that the AMOC has not declined since the 1960s! 🌊

Warm Seawater Encroaches on Major Antarctic Ice Shelf - Eos In unprecedented detail, new research illuminates the seasonal flow of warm water toward the Filchner-Ronne Ice Shelf.

What does the future hold for the Filchner-Ronne Ice Shelf?

@jbsallee.bsky.social, @elindarelius.bsky.social, & colleagues investigate in new #AGUPubs research.

eos.org/research-spo...

@oceanrics.bsky.social kicking off TRICUSO today
@noc.ac.uk, a new project that will develop technology & methods to address the #Carbon Sink Status of the #Southern #Ocean. Follow us for more information. #science #citizenscience @imocaglobeseries.bsky.social

Here is another #Bluesky starter pack with scientists who were involved in the @ipcc.bsky.social #AR6 reports (with a likely WGI bias). Please let me know if I missed you!
go.bsky.app/Erpq9Sq
@valmasdel.bsky.social @edhawkins.org @glenpeters.bsky.social @lisaschipper.bsky.social

A visual illustration of the case for geological net zero.