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#amoc

4 posts4 participants2 posts today

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

@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

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

Replied in thread

❄️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

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.

#ClimateChange #Europe #AMOC #Sustainability #GHG

medium.com/@hbrns/amoc-and-glo

Medium · AMOC and Global Climate: Can Southern Ocean Upwelling Save Europe from Climate Chaos?By Holger Behrens