Extremwetter — Die neue Normalität
Extreme Weather — The New Normal
📌 Zusammenfassung
Every additional 0.5°C of warming leads to clearly discernible increases in the frequency and severity of heat extremes, heavy rainfall events, and regional droughts (IPCC AR6). The world is already experiencing unprecedented heatwaves, wildfires, floods, and storms at 1.5°C.
🔬 Wichtigste Erkenntnisse
- 1Heatwaves: 30-100× more frequent than in a 1.5°C world vs pre-industrial
- 2Heavy rainfall: 7% more moisture per °C warming (Clausius-Clapeyron)
- 3Wildfires: California, Australia, Canada, Mediterranean — all seeing record seasons
- 4Hurricanes/typhoons: proportion of Category 4-5 storms increasing
- 5Droughts: Mediterranean, Western US, Southern Africa, Amazon — all worsening
- 6Compound extremes: heat + drought, storm surge + rainfall, heat + humidity exceeding human tolerance
- 7Wet-bulb temperature >35°C: parts of India, Persian Gulf, Pakistan approaching human survivability limit
📚 Quellen & Weiterführende Links
🔗 Weiterführende Deep Dives
AMOC — Kippt die Atlantische Meereszirkulation?
The Atlantic Meridional Overturning Circulation (AMOC) is one of Earth's most critical climate systems. It transports warm water from the tropics to the North Atlantic, keeping Europe significantly warmer than it would otherwise be. Recent science (2024-2026) indicates it is weakening and approaching a tipping point much earlier than previously assumed.
Globale Temperatur-Rekorde — Wo stehen wir?
2024 was the warmest year ever recorded, exceeding 1.5°C above pre-industrial levels for the first time. The last 10 years (2015-2024) were the 10 warmest on record. Despite La Niña cooling, 2025 remained the 3rd warmest year. The Paris Agreement's 1.5°C target is increasingly seen as breached.
Klima-Kipppunkte — Die kaskadenden Schwellen
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.
Meeresspiegel-Anstieg — Küstenstädte in Gefahr
Global sea level is rising faster than at any point in the last 3,000 years. Current rate: ~4.5mm/year (doubling every ~25 years). Projections for 2100 range from 30cm (best case) to over 2m (worst case with ice sheet collapse). Major cities at risk: Mumbai, Shanghai, Miami, New York, Jakarta, Bangkok, Lagos, Tokyo.
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