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📘 On Sumbawa, the summit disappeared

Stand on the rim of Tambora's caldera and the missing mountain is the first thing you notice. The depression is about six kilometres wide; before April 1815, the summit rose roughly four kilometres above sea level. Tambora had shown warning

4
lessons
~20 min
to learn
Adults
level
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What you’ll learn

  1. Tambora removes a mountainExplain what the 1815 Tambora eruption changed locally and why its caldera records its scale.Tambora's collapse, deposits, and pyroclastic flows reveal an eruption large enough to affect the atmosphere.
  2. Krakatoa makes a different kind of shockCompare Krakatoa's 1883 eruption with Tambora by separating volcanic size, tsunami impact, and communication.Krakatoa's collapse and tsunamis show how geography and technology shape disaster.
  3. A volcano reaches the stratosphereTrace how sulfur dioxide becomes sulfate aerosol and changes sunlight, circulation, and regional climate.Volcanic aerosols produce temporary, uneven cooling rather than one uniform global winter.
  4. 1816 turns weather into historyConnect unusual 1816 weather to food systems, historical records, and cultural responses without oversimplifying causation.The year without a summer became a human crisis through vulnerable harvests, prices, movement, and imagination.

Questions this course answers

What most directly caused Tambora's longer-lived climate effect?

Stratospheric sulfur dioxide formed sulfate aerosols that scattered sunlight and altered radiation.

Why is Krakatoa a useful comparison with Tambora?

Krakatoa's coastal setting and collapse-generated tsunamis made its human impact distinctive.

What does “year without a summer” mean?

The phrase describes severe seasonal anomalies, not a literal planet-wide winter.

Why can a global forcing produce different local weather?

Circulation, oceans, geography, and season determine how a global disturbance appears locally.

Which chain best describes Tambora's influence on 1816?

That sequence connects the volcanic event to atmospheric chemistry, climate, and human consequences.

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