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📘 Dawn over Sumbawa

You are standing on Sumbawa, looking toward Tambora's broad summit. Across the sea, Krakatau once occupied the Sunda Strait between Java and Sumatra. These are not two names for one event. Tambora's climactic eruption was in April 1815; Kra

5
lessons
~25 min
to learn
Adults
level
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What you’ll learn

  1. Two volcanoes, two clocksDistinguish Tambora's 1815 eruption from Krakatau's 1883 eruption by place, date, and hazard pathway.A map and timeline keep two Indonesian volcano stories separate.
  2. Krakatau turns sea into evidenceExplain how volcanic collapse and flows can displace seawater and how evidence constrains the story.Krakatau shows how island geology becomes coastal tsunami risk.
  3. Sulfur builds a veilTrace sulfur dioxide to stratospheric sulfate aerosols and an uneven climate response.Atmospheric chemistry explains the long-distance signal.
  4. 1816 makes weather historicalConnect Tambora's aftermath to regional weather, harvest stress, records, and vulnerability.The Year Without a Summer became history through forcing and human systems.
  5. A careful comparisonCompare fingerprints, timescales, evidence, and uncertainties.A careful comparison keeps pathways and open questions visible.

Questions this course answers

Which event is most closely linked to the 1816 Year Without a Summer?

Tambora's 1815 eruption preceded the disrupted growing season of 1816.

Why did Krakatau's setting matter?

The Sunda Strait exposed shorelines, ships, and settlements to displaced water.

Which material drives the longer-lived climate effect?

Sulfate aerosols can reflect sunlight high in the atmosphere for months or seasons.

What does Year Without a Summer describe?

The phrase describes widespread but uneven seasonal anomalies.

Why compare diaries, prices, crop records, and reconstructions?

Different evidence types illuminate weather, scarcity, and social pathways.

Grounded in trusted sources

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