A vital system of Atlantic Ocean currents is weakening and closer to collapse than thought, new studies find | CNN New research provides alarming evidence this ocean circulation is slowing and could be heading toward a shutdown, which would have catastrophic impacts on the planet’s weather and climate.

A nice coverage by @cnn.com of our article published last week in Science Advances on the weakening on the AMOC www.cnn.com/2026/04/16/c...

In conclusion, the #AMOC strength estimated at 26°N is declining, and this appears to be representative of what is happening throughout the subtropical to mid-latitude North Atlantic.

Such pressure signals from deep western overturning transport may arguably serve as an effective indicator of potential #AMOC changes, even if they are partially offset by signals at the eastern boundary.

We argue that in a sense, the observations we gathered from multiple arrays at the western boundary, in isolation from the eastern boundary, constitute the canary in a coal mine for the tendency of the #AMOC.

Meridionally consistent decline in the observed western boundary contribution to the Atlantic Meridional Overturning Circulation Western boundary observations in the Atlantic suggest a meridionally consistent decline in the ocean overturning circulation.

We find that the western boundary #AMOC trend signals at these three other arrays are consistent with RAPID. Thus, we find a “Meridionally-Consistent Decline in the Observed Western Boundary Contribution to the Atlantic Meridional Overturning Circulation”. 👇 www.science.org/doi/10.1126/...

Our paper led by Qianjiang Xing published in Science Advances of @science.org today examines the RAPID weakening trend in the context of other new and consistent estimates of #AMOC strength at three other latitudes in the North Atlantic, using pressure gradient data only from the western boundary.

At least, let's use this linear trend as a firm benchmark for climate models which are a little bit all over the place when it comes to the AMOC trend (non modeler assessment here)

But maybe not if that linear trend is an approximation of something like natural multidecadal variability. In other words, the AMOC strength might go back up in the near future.

Is this evidence that the #AMOC is weakening because of climate change and as predicted by climate models? Maybe, if we assume that a linear trend over 20 years is representative of that.

In other words, as we often say, the trend is “statistically significant”. I estimate that this significance emerged around 2022 with the time series starting in 2004.

This personal statement relies on a careful estimation of the #uncertainty associated with that trend which I calculated to be -1 +/- 0.7 per decade from 2004 to 2024 (2-σ uncertainty).

Is the #AMOC currently weakening? A thread. Yes, if you fit a straight line through the time series of AMOC strength derived from the #RAPID array at 26°N, it does, at a rate approaching 1 Sv per decade over the last 20 years.

Look at these cheerful scientists on the first day of #OSM26. Still smiling just like how we mean to go on! @selipot.bsky.social

I don’t think we are all too busy to review. I think that increasingly we refuse to work for free. Time to pay reviewers. What was the hashtag ? #450movement ?

Evaluation of a Reduced RAPID Array for Measuring the AMOC Moorings at the western boundary and in the upper 3,000-m depth of the array are an essential part of the 26°N observing system Hydrographic sections can replace the deepest moorings along the ea...

New paper alert led by Tyllis Petit! Mooring observations are crucial for obtaining the long-term trend of the #AMOC. See "Evaluation of a Reduced RAPID Array for Measuring the AMOC" in @jgroceans.bsky.social agupubs.onlinelibrary.wiley.com/doi/10.1029/...

Happy Halloween! Courtesy of the ocean techs at @miamirosenstiel.bsky.social

US climate scientists need all the help they can get. Including from foul-mouthed comedians! 🤡😱😱

Watch Emmy Award-Winning David Cross team up with Prof Michael Oppenheimer in the US launch of the hit series "Climate Science Translated".

#climate #arresteddevelopment #climatescience

Checkout the latest release of our #Lagrangian #Python software @clouddrift.bsky.social 👇It's officially Hurricane season and the historical tracks of tropical cyclones are readily available from the clouddrift data library.

EM-APEX float with ID 10381 found on the beach on Abaco, The Bahamas. DM me for contact.

New release for @clouddrift.bsky.social, our #opensource python software and library for #Lagrangian #ocean and #atmosphere data. Check it out! 👇#opendata #opensource

Anyone know a good website with map displays of near real time ssh and geostrophic surface velocity from altimetry?

The day that @CopernicusEU Climate change service announces that 2024 was 1.6 C on average, and LA is on fire, The Daily podcast features an advertisement by the American petroleum Institute (or similar) promoting the burning of more fossil fuels. Well done @nytimes.com

Hey oceanographers! Are you sometimes getting confused when you read or write about errors, uncertainty, biases and the likes? No worries, we got you, the @usclivar.bsky.social #OceanUQ working group has produced a handy #glossary, check it out at oceanuq.org/learn/glossary

DeepMind AI weather forecaster beats world-class system Artificial-intelligence model provides forecasts 15 days out, as well as the probability of accuracy. And it does so faster than the best operational model.

Kind of a big deal, no?

−0.8 ± 0.7 Sv per decade is what the authors call marginal significance. I would too.

Flipping Ship FLIP Freed from Fateful Trip - Eos A beloved research vessel will have a second career after an underwater technology company saved it from the scrapyard.

So awesome, FLIP gets a second life! eos.org/articles/fli...

Pangeo showcase: "HYCOM-OceanTrack: From 17,518 NetCDF files to an Analysis-Ready Cloud-Optimized dataset in the cloud?" Title: “HYCOM-OceanTrack: From 17,518 NetCDF files to an Analysis-Ready Cloud-Optimized dataset in the cloud?” Invited Speaker: Shane Elipot (ORCID: 0000-0001-6051-5426) When: Wednesday, October 16,...

Tomorrow Wednesday October 15 at 12 PM EDT I am giving a little #Pangeo Showcase talk about our latest Eulerian and Lagrangian dataset in the cloud, HYCOM-OceanTrack. Please join, info and link below 👇
discourse.pangeo.io/t/pangeo-sho...

Check out this animation you can make using our python notebook tutorial github.com/selipot/hyco...

The dataset is otherwise described in details in the following paper in Scientific Data👇
t.co/cfIx7PBqcg

New post on #Pangeo discourse to publicize a new Eulerian+Lagrangian cloud-optimized #ocean dataset available to anyone on #AWS registry of open data
Please share and check it out👇
t.co/C996weGqKU