Klima-Kipppunkte — Die kaskadenden Schwellen

📌 Zusammenfassung

The "Global Tipping Points Report 2025" (160 scientists, 23 countries) identifies critical thresholds that, once crossed, trigger self-reinforcing changes. Coral reefs have already tipped. Five more tipping points are at risk near 1.5°C: Greenland ice, West Antarctic ice, AMOC, Amazon rainforest, and permafrost.

🔬 Wichtigste Erkenntnisse

• 1Warm-water coral reefs have ALREADY crossed their tipping point at current ~1.4°C warming
• 25 tipping points at risk near 1.5°C: Greenland, AMOC, Amazon, West Antarctica, Permafrost
• 3Overshooting 1.5°C (now considered almost unavoidable in late 2020s/early 2030s) could trigger multiple tipping points
• 4Greenland melting 7× faster than 30 years ago (~234 billion tons/year)
• 5Amazon: lower bound of tipping threshold lowered to 1.5°C; 17% already deforested
• 6Permafrost contains ~1,400 billion tons of carbon — thawing creates self-reinforcing feedback
• 7West Antarctic: marine ice sheet instability potentially underway (Thwaites Glacier)
• 8Tipping cascades: one tipping point can increase the probability of others

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