The Fastest Climate Change in Earth's History
🌡️ The Fastest Climate Change in Earth's History
Earth's climate has always changed — ice ages have come and gone over millions of years. But what is happening now is different: the current rate of warming is at least ten times faster than any natural warming event in the geological record. Ice cores drilled from Antarctica contain bubbles of ancient air dating back 800,000 years. They show that CO₂ levels have never been as high as they are today in all that time — and the rise over the past 200 years is virtually vertical on the graph. This is chemistry in action on a planetary scale.
🎯 Exam Priority: Examiners most commonly ask about sea level rise and extreme weather events as consequences of climate change. Learn these two first, then expand to ice caps, migration, and food supply.
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🧠 Memory Aid
SIRF: Sea levels rise, Ice caps melt, Rainfall changes, Flooding increases
For evidence: "TIMC — Temperature records, Ice cores, Melting ice, Changing seasons"
Key numbers to remember:
- 1.1°C = current global warming above pre-industrial
- 280 → 420+ ppm = CO₂ change since 1750
- 23 cm = sea level rise since 1880
- 13% = Arctic ice loss per decade
Quick Check: Give TWO pieces of evidence that global climate change is occurring.
Any two from: rising global average temperatures (measured since 1880); ice core data showing highest CO₂ levels in 800,000 years; retreat of mountain glaciers and Arctic sea ice; sea level rise of 23 cm since 1880; earlier spring events (bird migration, flowering times).
Now try it yourself
Quiz · Question 1 of 20
Which statement correctly describes the difference between weather and climate?
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