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#amoc

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Für alle, denen die Tatsache, dass wir gerade dabei sind unsere Lebensgrundlage zu verspielen, die Dringlichkeit nicht verdeutlicht... Vielleicht hilft das Argument:

Einer Schätzung des Finanzdienstleisters MSCI zufolge werden Klimaschäden, erforderliche Umbauten und die Anpassung an die Erwärmung in den kommenden 25 Jahren weltweit Kosten in Höhe von 25 Bill. US-Dollar verursachen, allein im Immobilienmarkt. Immobilien sind global die wichtigste Klasse von Investitionsgütern. Die drohenden Schäden seien so gewaltig, so der britische „Economist“, dass nicht nur persönlicher Wohlstand Einzelner, sondern das gesamte Weltfinanzsystem in Gefahr sei. 

Von @chrisstoecker

blaetter.de/ausgabe/2025/april

www.blaetter.deDas Klima läuft AMOC | Blätter für deutsche und internationale PolitikDer Klimawandel stellt eine immer dramatischere Bedrohung dar. Das zeigt Christian Stöcker unter anderem an neuer Forschung zur atlantischen Umwälzströmung (AMOC). Die Politik muss sich endlich dieser Wirklichkeit stellen und die Dekarbonisierung der Wirtschaft vorantreiben.

Exploring the risks of ‘cascading’ tipping points in a warming world

Tipping elements within the Earth system are increasingly well understood.

Scientists have identified more than 25 parts of the Earth’s #climate system that are likely to have #TippingPoints – thresholds where a small additional change in global warming will cause them to irreversibly shift into a new state.

The “tipping” of these systems – which include the Atlantic Meridional Overturning Circulation (#AMOC), the #Amazon #rainforest and the #Greenland ice sheet – would have profound consequences for both the #biosphere and people.

More recent research suggests that triggering one tipping element could cause subsequent changes in other tipping elements, potentially leading to a #TippingCascade.

For example, a collapsed AMOC could lead to dieback of the Amazon rainforest and hasten the melt of the Greenland ice sheet.

However, the interactions between individual tipping elements – and the ways they might trigger each other – remain largely underexplored.

In a review study, published last year in Earth System Dynamics, we unpack the current state of scientific understanding of the interactions between individual tipping elements.

We find that scientific literature suggests the majority of interactions between tipping elements will lead to further destabilisation of the climate system.

Existing research also indicates that “tipping cascades” could occur even under current #GlobalWarming projections.

Scientific understanding of individual #TippingElements is continuously improving, but more research on their interactions is needed.

carbonbrief.org/guest-post-exp

Replied in thread

@BartVerheggen @Sustainable2050

Ah that makes sense.

So in contrast to what the #NOS quote suggests, it's not so much that the #AMOC causes the climate in #Europe to be warmer than that of (the comparable part of) #Canada. It actually prevents it from being much colder.

(Where "comparable" should then not only be understood in terms of latitude, but also in terms of the east-west exposure to the ocean.)

Good luck science-communicating that ...

@Sustainable2050

Vancouver is located at a similar latitude as Lourdes-de-Blanc-Sablon, but at the west coast of #Canada.

Therefore it receives relatively warm air from the ocean in the winter, which means its winter temperatures are similar to those of Amsterdam.

In fact, despite the absence of an #AMOC equivalent, #Vancouver 's average winter temperature appears to be slightly higher than that of #Amsterdam?

@BartVerheggen Any thoughts?

@rahmstorf

In 1989 James Burke produced a documentary named "After the Warming" which highlighted the effect of slowing the global thermohaline circulation current.

"That was the key to everything. Change the saltiness of the Atlantic and you change the world's weather."
#AMOC #GlobalWarming #ClimateChange

youtu.be/451xJqNGFqU?si=40OsK3

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New summary by @rahmstorf

Is the Atlantic Overturning Circulation Approaching a #TippingPoint?

"But the fact that all these studies, using different methods, point in the same direction, toward a risk that is much larger and earlier than we had thought until a few years ago, is a major concern. My assessment of these ... studies is that by the time they can provide a reasonably reliable warning of an impending #AMOC tipping, it will be too late to prevent it."
#climate
tos.org/oceanography/article/i

❄️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.
mpimet.mpg.de/en/communication
CC BY 3.0 Ziemen et al. 2025 doi.org/10.5446/69659

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:

Bluesky SocialBlätter für deutsche und internationale Politik (@blaetter.bsky.social)Die »Blätter« – die meistgelesene politische Monatszeitschrift im deutschen Sprachraum

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.

uni-hamburg.de/newsroom/forsch

Universität Hamburg · Schwächere Meeresströmung könnte Billionen kostenBy Newsroom-Redaktion

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 🔗 youtu.be/BoNA-C7fFoI?feature=s

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