The stability of the AMOC is crucial for maintaining a balanced climate, especially for countries surrounding the Atlantic Ocean. A significant slowdown or collapse of the AMOC could lead to abrupt and potentially irreversible changes in climate. For Europe, this could mean much colder temperatures, especially in the winter months, and significant shifts in precipitation patterns.
Diminishing Arctic sea ice may disrupt vital ocean currents, triggering severe global climate shifts. Discover the latest findings. #ClimateChange #AMOC #ArcticIce
https://geekoo.news/thinning-arctic-sea-ice-threatens-global-ocean-circulation/
Recommended first video from a new YT channel.
Astrum Earth: *What the AMOC Will Do to Earth This Century*
https://www.youtube.com/watch?v=GDy7Q8iAtFg
(
Invidious: https://id.420129.xyz/watch?v=GDy7Q8iAtFg)
Thinner Arctic sea ice may affect the AMOC, say scientists
https://phys.org/news/2025-03-thinner-arctic-sea-ice-affect.html
The Arctic Beaufort Gyre in CMIP6 Models: Present and Future - Athanase - 2025 - Journal of Geophysical Research: Oceans - Wiley Online Library
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2024JC021873
Im aktuellen CEN Newsletter geht es darum, wie KI für bessere Sturmflut-Prognosen sorgt, welchen Preis eine Abschwächung der AMOC hätte und wie Tiden die CO2-Speicherung in den Meeren beeinflussen. Jetzt abonnieren und nie wieder etwas verpassen: https://www.cen.uni-hamburg.de/press/newsletter.html
https://sailing-dulce.nl/home/article-8832 #energieimbalans #leonsimons #amoc #stefanrahmstorf #tippingpoint Vrijdag 28-03-2025 'De meest belangrijke grafiek in de wereld', noemt klimaatblogger Leon Simons de curve hierboven. Vergeet de typefout. De gegevens worden maandelijks bijgehouden door de NASA-Ceres satelliet en de grafiek door Simons. Hij toont simpelweg de stralingsbalans van de aarde en het deficiet, dus het tekort tussen de inkomende stralingswarmte van de zon en de uitstraling van stralingsenergie..
Ich habe mich, weil in der April-Ausgabe der @blaetter für deutsche und internationale Politik ein Text von mir über #AMOC, Klima- und Energiepolitik erscheint, mit @KarinGothe.bsky.social darüber unterhalten, warum auch Schwarz-Rot zu sinnvoller Energiepolitik verdammt ist. Links:
Good AFP fact check on false claims by notorious climate misinformer Anthony Watts about the risk of a major weakening of the Atlantic Meridional Overturning Circulation, known as #AMOC.
It is laudible that AFP makes the effort to sort science from lobbyist distortions!
https://factcheck.afp.com/doc.afp.com.36Z27BV
Our new paper led by Irene Trombini @irtrombini.bsky.social, Nils Weitzel and co-authors on #Dansgaard-Oeschger events - rapid warming events during the last Glacial is now out! 
Discover how the atmosphere and the ocean shaped the Southern Hemisphere's response to past #AMOC variations 
https://doi.org/10.1029/2024GL111473
On our way to 2100, the continued AMOC weakening leads to less and less CO2 uptake. (Which increases social cost of carbon, SCC)
https://www.pnas.org/doi/10.1073/pnas.2419543122
"Weakening AMOC reduces ocean carbon uptake and increases the social cost of carbon" by Schaumann et al 2025.
They combine a geochemical model with a freshwater hosing model and then watch how many CO2 molecules manage to sink to the ocean floor in which warming scenario.
German #scicomm summary:
https://nachrichten.idw-online.de/2025/02/25/schwaechere-meeresstroemung-koennte-billionen-kosten
*****
Hm. Is that it for the hope for 0 additional warming soon after emissions have stopped. Because that hope is based on how the oceans are assumed to keep removing CO2 from the atmo for a while after zero emissions is achieved.
The slowing #AMOC at its Northernmost branch used to do the heavy lifting in carbon removal via the forklift of temperature and salinity, that's how I read the paper.
Come to think of it, the wind "around" Antarctica is picking up speed due to #climatechange. This wind pulls up water from the deep Southern Ocean and is thus also part of the AMOC, a part projected to speed up, not slow down. Yay.
But.
Pulling up deep water faster also pulls up the old carbon faster which was transported there by the AMOC.
So...uhm, does this increased wind-driven carbon upwelling intensify the effect of the ever-reduced carbon removal by the slowing AMOC?
I bet, this would be visible in #paleoclimate data around the Younger Dryas. Eg, pairing the Greenland annual temperature time series and annual Antarctic CO2 record.
If correct then I'd expect: just before the AMOC collapse, when Greenland still heats up, CO2 growth should increase. And when AMOC slows down, when Greenland starts cooling, the annual growth in CO2 should further intensify.
Unless... hm. The re-cooling also buries a lot of soil and plants under new ice in Scandinavia and Canada. Could be, this process balances the otherwise expected growth increase.Hm.
Going to look at it tomorrow. Am again completely in awe that we do have annually resolved Greenland temperature and Antarctic CO2 levels all the way back to the previous interglacial!!
Die Abschwächung der Nordatlantischen Umwälzströmung (#AMOC) könnte bis 2100 wirtschaftliche Schäden in Billionenhöhe verursachen.
Eine schwächere Strömung bindet naturgemäß weniger #CO2 im Ozean, was die #Erderwärmung weiter verstärkt. Dadurch steigen die gesellschaftlichen Kosten durch #Extremwetter wie #Hitze, #Dürre und #Überschwemmungen. Die Folgen wurden bisher wohl unterschätzt.
https://www.uni-hamburg.de/newsroom/forschung/2025/0225-amoc.html
Schwächere Meeresströmung = Billionenkosten? 
Eine #AMOC-Abschwächung senkt die #CO₂-Aufnahme des Ozeans, verstärkt die #Erderwärmung & treibt Kosten in die Höhe - das fanden die Forscher @felixschaumann & @Edu_Alastrue in ihrer neuen Studie heraus. In diesem short Wissen-Was-Video fasst Carolin Riethmüller das Wichtigste für Euch zusammen (2:45 min) (@MPI_Meteo 
https://youtu.be/BoNA-C7fFoI?feature=shared
TIL der nordatlantische Umwälzstrom AMOC schwächt sich ab. Das sorgt für Veränderungen im Niederschlag, steigenden Meeresspiegeln, usw. Zudem können die Meere damit weniger CO2 "verschlucken". Das wiegt den kühlenden Effekt der Abschwächung komplett auf und sorgt so für weitere Erwärmung https://www.uni-hamburg.de/newsroom/forschung/2025/0225-amoc.html #amoc #klimawandel #CO2
Neue Studie der Universität Hamburg und des Max-Planck-Instituts für Meteorologie: Schwächere Atlantikströmung #AMOC könnte Billionen kosten
https://www.uni-hamburg.de/newsroom/forschung/2025/0225-amoc.html
Comprehensive Review paper:
Key drivers of large scale changes in North Atlantic atmospheric and oceanic circulations and their predictability
#SciLogs » #KlimaLounge » Allgemein »
Schwächt die AMOC sich ab?
Ja? Nein? Doch?
Von Stefan Rahmstorf @rahmstorf
In den Medien gab es in letzter Zeit einiges Hin und Her über die #Verlangsamung der #AMOC. Die Spannbreite reichte von “kurz vor dem Zusammenbruch” bis “stabiler als bisher angenommen”. Die Abkürzung AMOC (für Atlantic Meridional Overturning Circulation) bezieht sich dabei auf die atlantische #Umwälzzirkulation, eine der wichtigsten #Ozeanströmungen
https://scilogs.spektrum.de/klimalounge/schwaecht-die-amoc-sich-ab-ja-nein-doch/
https://www.nature.com/articles/s41467-023-39810-w
what nobody seems to want to delineate is what happens when both the Atlantic meridional overturning circulation #AMOC *and* the Antarctic Circumpolar Current #ACC happen concurrently, which appears to be where we're heading, imho...
Niu et al investigate the growth of the Eurasian Ice Sheets from the MIS 3 minimum (38,000 years ago) using a coupled ice sheet, atmosphere and ocean model. They find the rapid growth of the ice sheets happened only when there was a weak AMOC.
Weakening currents in the Atlantic may mean a wetter northern Australia and drier New Zealand
https://theconversation.com/weakening-currents-in-the-atlantic-may-mean-a-wetter-northern-australia-and-drier-new-zealand-248679
