Did a volcanic eruption trigger ancient climate change?

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Discussion Overview

The discussion revolves around the potential connection between a volcanic eruption, specifically that of Krakatoa in 535 AD, and significant climate changes during the Dark Ages. Participants explore historical accounts, tree ring data, and ice core samples to understand the implications of these events on global climate, societal structures, and the emergence of plagues.

Discussion Character

  • Exploratory
  • Debate/contested
  • Historical

Main Points Raised

  • Some participants reference historical accounts, such as those by Procopius and John of Ephesis, describing significant solar darkening and climate decline around 535-536 AD.
  • Tree ring analysis indicates reduced growth during this period, suggesting widespread agricultural failures and droughts in various regions, including Europe and South America.
  • Some argue that the eruption of Krakatoa is the most likely cause of these climatic changes, while others suggest alternative volcanic events or eruptions, such as a proto-Krakatoa eruption.
  • There is mention of the bubonic plague's emergence during this time, with some participants questioning the relationship between cooler temperatures and the spread of the plague.
  • Participants discuss the potential for misdating volcanic events and the implications of ice core data on understanding the timeline of eruptions and their climatic effects.
  • Some contributions highlight the need for further research into the volcanic activity and its long-term impacts on climate and society.

Areas of Agreement / Disagreement

Participants express a range of views regarding the causes of climate change during the Dark Ages, with no consensus on the specific volcanic event responsible or the relationship between climate and the bubonic plague. Multiple competing hypotheses remain, and the discussion is unresolved.

Contextual Notes

There are limitations in the data presented, including uncertainties in the dating of volcanic eruptions, the interpretation of tree ring evidence, and the relationship between climate conditions and the emergence of diseases like the bubonic plague.

  • #31
http://www.vortigernstudies.org.uk/artwho/incest.htm

Vortigern

From wiki.

The first writer to tell the story of Vortigern was the sixth century historian Gildas, writing his De Excidio et Conquestu Britanniae ("On the Ruin and Conquest of the Britains") in the first decades of the 6th century. He tells us (chapter 23) how "all the councillors, together with that proud usurper [omnes consiliarii una cum superbo tyranno]" made the mistake of inviting "the fierce and impious Saxons" to settle in Britain. According to Gildas, apparently a small group came at first, and was settled "on the eastern side of the island, by the invitation of the unlucky (infaustus) king". This small group invited more of their countrymen to join them, and the colony grew. Eventually the Saxons demanded that "their monthly allotments" should be increased, and when their demands were eventually refused, broke their treaty and plundered the lands of the Romano-British.
 
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