Between the last glacial maximum & today, humans were exposed to severely rising sea levels & recurrent phases of strong abrupt cooling events. #MPIM researchers have uncovered the origin of these strong temperature fluctuations over the past 20,000 years using a novel coupled climate-ice sheet model. They found that #iceberg armadas & changed river courses were responsible for #AMOC weakening & abrupt cooling.
https://mpimet.mpg.de/en/communication/detail-view-news-homepage/new-climate-model-reveals-the-triggers-of-abrupt-climatic-changes-in-the-past-20000-years
CC BY 3.0 Ziemen et al. 2025 https://doi.org/10.5446/69659

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 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

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

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

https://europepmc.org/article/PMC/PMC11882673

#climatechange #news #AMOC @kathhayhoe

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.

#ClimateChange #AMOC #IceSheets #Europe

https://doi.org/10.1038/s41612-025-00982-5

Jet streams are fast flowing, narrow air currents. The main jet streams flow west to east around the globe.

Because of #climate collapse, the northern polar jet stream becomes more variable. A stratospheric polar vortex disruption is linked with extreme cold winter weather across parts of Asia and North America, including the Feb. 2021 North American cold wave. Report: https://www.bbc.com/news/science-environment-58425526

Anyway, #AMOC (the main ocean current system in the Atlantic Ocean) currently offers 12°C to Ireland:

Weakening ocean currents could cost trillions of dollars – Earth.com…

The Atlantic Meridional Overturning Circulation #AMOC . a colossal conveyor belt of warm and cold water, keeps #weather patterns in check, stabilizes #temperatures , and even dictates rainfall in distant corners of the world...

https://formuchdeliberation.wordpress.com/2025/03/04/weakening-ocean-currents-could-cost-trillions-of-dollars-earth-com-2/

#FYI #PaulBeckwith video lecture and literature review #AMOC #AmocShutdown

"- wind driven flow of water in the Southern Hemisphere would keep the AMOC flow slightly above zero
- havoc would still be wreaked on the Earth
- this new paper is not in disagreement with previous work, but adds to our understanding of the AMOC"

https://www.youtube.com/watch?v=T8rj117OvAI

Die AMOC ist Teil des mächtigsten Flusses der Welt – ein Netzwerk aus Meeresströmungen wie dem Golfstrom, das sich über zehntausende Kilometer von der Südsee bis nach Grönland erstreckt.

#Golfstrom #AMOC #Klima

https://t3n.de/news/klima-kipppunkt-wie-wahrscheinlich-ist-ein-kollaps-des-golfstroms-1675502/

The Guardian: Total collapse of vital Atlantic currents unlikely this century, study finds…

Vital Atlantic Ocean currents are unlikely to completely collapse this century, according to a study, but scientists say a severe weakening remains probable and would still have disastrous impacts on billions of people... #atlanticocean #AMOC #climatechange #globalwarming

https://formuchdeliberation.wordpress.com/2025/02/27/the-guardian-total-collapse-of-vital-atlantic-currents-unlikely-this-century-study-finds/