#FYI #StefanRahmstorf #PotsdamInstitute #Atlantic #AMOC #ColdBlob #Greenland
"The northern Atlantic is the only region of the world which has defied global warming and has been cooling. What is going on there? What does the latest science say?
Talk at Utrecht University on 5 August 2025."
The northern Atlantic is the only region of the world which has defied global warming and has been cooling. What is going on there? What does the latest science say about the 'cold blob'? #AMOC
My talk at Utrecht University this week. 
https://youtu.be/sy2kBPujc4w
Slowing ocean currents could dry out the tropics – Earth.com…
#Climatechange may cut rainfall across the tropics by slowing a key Atlantic current, threatening #ecosystems and livelihoods... #AMOC #globalwarming #climatechange #precipitation Source: Slowing ocean currents could dry out the tropics - Earth.com
«Dagens kulderekord i Oslo er minus 31,1 grader. Med en kollaps i Amoc vil Oslo kunne oppleve temperaturer ned til -47,9°C»
https://www.nrk.no/klima/frykter-temperaturer-ned-mot-minus-50-i-oslo-om-amoc-forsvinner-1.17454602
"This video is for the IRISH! And the NORWEGIANS!" -- @hankgreen
https://www.youtube.com/watch?v=pThcIgJyNME
Mass mortality events
Dead marine sea life is washing up on the beaches
Mass bird deaths line the beaches
"There's a lot of concerning things going on with ocean ecology at the moment, so we are watching events like this with a bit of trepidation."
https://www.abc.net.au/news/2025-07-22/avian-influenza-not-the-cause-of-coral-bay-bird-deaths/105546660
Beaches are littered with fish and marine carcasses
https://www.theguardian.com/australia-news/2025/jul/20/sas-toxic-algal-bloom-is-twice-the-size-of-the-act-has-killed-12000-animals-and-is-filling-even-the-experts-with-dread
“Ocean temperatures are heating up. It’s creating conditions that are conducive to algal blooms all around the world."
https://www.theguardian.com/environment/2025/jun/15/deadly-algal-bloom-in-south-australias-coorong-an-environmental-eye-opener-ecologist-says
#FossilFuels #Climate #ClimateBreakdown #MarineHeatwave #AMOC #HABs #pollution #runoff #hypoxia #toxins #marine #biodiversity #FishKill #MassMortalityEvents #MME #Biodiversity #birds #DeadZones #ocean #ecology #Australia #PlanetaryBoundaries
#Kipppunkte im #Klimasystem wie das Abschmelzen des westantarktischen Eisschilds oder ein Zusammenbruch der #AMOC könnten unsere Umwelt unumkehrbar verändern – auch in Europa.
Ohne sofortigen #Klimaschutz drohen #Sturmwinter, steigende #Meeresspiegel und massive Schäden an Städten und Infrastruktur.
#Buchtipp: Grundwissen für Erwachsene findet Ihr im Buch "Der #Klimawandel für Einsteiger", ISBN: 978-3-738-63782-3
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And now that we have all read the explainer above on #ACC , the Antarctic Circumpolar Current(s),
we can better appreciate what Matt England explains here from about minute 50 onwards
https://www.youtube.com/live/39T7bW7KA18
He actually answers a question I put to him beforehand on Bluesky, regarding my confusion about salinification versus freshening.
The beginning of this #ClimateChat episode hosted by Dan Miller and Leon Simons
is all about Matt's paper with Rahmstorf and others about the 2023 bananas in the North Atlantic. You may recall: low wind speed as primary cause by far for the marine heatwaveS 2023 that gripped regions of the North Atlantic one after the other.
Matt explains the multiple ways wind over oceans contribute to cooling.
a) mixing b) white caps on the waves = albedo increase c) ocean spray or fog = albedo increase, and one more I now forget.
As is Dan Miller's habit, he also quickly asks Matt about #geoengineering, bringing SO2 into the #stratosphere .
Matt's reply: 1) angry that fossil fuel industry should be let off the hook by this
2) realistically, the political mindset lets Matt expect that geo engineering will be done.
3) whether he supports this is not answered.
4) as an afterthought, he adds that ocean acidification from relentless CO2 emissions does continue despite geo-engineering, and also the CO2 take-up and later re-release into the atmosphere continues.
Dan Miller also grazes his pet topic #ShippingSO2 . Matt politely agrees that it is a bananas factor – but a small one.
Then comes the Southern Ocean part (thank you!).
At which point the question is also raised and answered with a NO: whether seafloor #clathrate on Antarctica's continental shelf might thaw and cause a methane bomb.
And only one short moment at the end on #AMOC collapse, about which Matt also published a paper recently, namely the #collapse impacts non-Europe areas, such as teleconnections to adjacent basins and into the Southern Hemisphere
https://www.nature.com/articles/s41558-022-01380-y
I think, my question stole precious time from the AMOC part. 
@rahmstorf
...worüber jedoch außerhalb der Fachkreise m. W. bislang niemand redet:
Sehr bedeutsame Umkehrung der #Ozeanzirkulation im Südlichen Ozean (#SMOC) entdeckt, mit wichtigen Auswirkungen auf das #Klima
Dass die Wissenschaft eine derart gravierende Änderung selbst der *Strömungsrichtung* übersehen haben soll, stellt für mich als Nicht-Klimatologen auch in Anbetracht der Uneinigkeit der Wissenschaft in Bezug auf #AMOC die Verlässlichkeit der Erkenntnisse in Frage
https://mastodon.social/@HistoPol/114833785452094668
Ich beobachte das Thema auch schon lange.
Mein Zwischenfazit von 01/25 war:
"Schwächeln, kippen oder stark bleiben? Experten treffen sich in Brüssel, um eine Studie über die atlantische meridionale Umwälzzirkulation (AMOC) zu beginnen"
"Der Abschlussbericht, der in den nächsten eineinhalb Jahren erwartet wird, soll Entscheidungsträgern belastbare Erkenntnisse für die Klimapolitik auf nationaler und internationaler Ebene liefern."
Das ist schon ein arg naives Feature. Journalist sieht 2 Teile von einem 1000-Teile-Puzzle: eine Studie und einen offenen Brief von 44 Experten zum #AMOC Risiko, und glaubt die müssen zusammen passen. Dass es 40 Jahre Forschung und viele hunderte Studien zum Thema gibt hat er nicht bemerkt - obwohl unter dem offenen Brief viele Quellen angegeben sind, auch ein Übersichtsartikel. Lesen hilft!
https://www.mdr.de/wissen/umwelt-klima/kipppunkt-klima-amoc-umwaelzstroemung-atlantik-feature-100.html
New study: More oxygen in the oxygen-minimum zone associated with weaker Atlantic overturning circulation - now in Nature Communications.
Find out more here 
https://www.marum.de/en/Oxygen-AMOC.html
#FYI #JustHaveAThink #SMOC #AMOC #reverse #Antarctic
Another clarifying video on the change of the Southern Overturning Circulation.
@why_not @morsuapri Inzwischen wird es immer wahrscheinlicher, dass wir auch das Kippen des #AMOC / #Golfstrom|s bald erleben werden. Was viele Leute imho falsch verstehen, dass es "gut" sein könnte, dass #Europa dann wieder kälter wird.
Ja, kann sein, dass es hier kälter werden könnte. Aber die #Erderhitzung rast trotzdem ungebremst weiter.
Wenn es jetzt irgendwo kälter wird, nur weil die heute noch in der #Arktis und #Antarktis vorhandene "Kühlung" woanders hin abfließt, wird es dafür nur woanders um so schneller um so heißer.
Seen a #TippingPoints story recently about the SMOC (the ocean's overturning circulation around Antarctica, i.e. AMOC's southern sibling) abruptly reversing?
Thankfully, it's not true (seems a press release got overenthusiastic).
Want to know what the paper behind it really said? Read this from the lead author instead: https://theconversation.com/completely-unexpected-antarctic-sea-ice-may-be-in-terminal-decline-due-to-rising-southern-ocean-salinity-259743
Spannend: die Europäische Raumfahrtagentur ESA möchte die Stärke der Atlantikzirkulation #AMOC mit einer Satellitenmission beobachten.
Sie schreibt, dass die AMOC sich abschwächt und einem kritischen Kipppunkt nähern könnte.
https://www.esa.int/Applications/Observing_the_Earth/FutureEO/New_ESA_gravity_mission_to_detect_weakening_ocean_conveyor
@drsimevans Has anyone tried to calculate the costs if #AMOC collapses before 2100?
#FYI #PaulBeckwith video lecture and literature review
#SMOC reversal implications Part II: short and long term impact on #AMOC, #jetstreams, #polarvortex, #ENSO, #foodsecurity
“This could double current atmospheric CO₂ concentrations by releasing carbon that has been stored in the deep ocean for centuries,” the report said. Such a release would likely obliterate existing climate targets, as the additional emissions would overwhelm current carbon budgets and render mitigation strategies based on gradual reductions, obsolete.
“The planet is sending us increasingly clear signals that we are crossing critical thresholds,” the ICM warned, characterising the event as a shift from “chronic climate stress” to “acute systemic breakdown.” #ClimateChange #ClimateCrisis #ClimateEmergency #oceans #OceanCurrents #weather #GlobalWarming #AMOC
terror 
