Kafka2
Whale-raping abomination
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What is the 535 Catastrophe theory?
This article revolves around the case presented by David Keys in his book "Catastrophe: An investigation into the origins of the modern world", which suggests that the "modern age" started in 535 AD with an eruption of Krakatoa. This eruption caused widespread climate change, resulting in floods, droughts and extreme low temperatures. In the aftermath, plague spreadacross the world. These factors destabilised old regimes all over the world, creating power vacuums into which new empires arose. Keys links this to the rise of Islam, the migration of the Avar to Europe (and the displacement of other people in the process), the rise of the Turks, the decline of Britain and Teotihuacan, the reunification of China and the rise of Buddhism in Japan.
"Catastrophe" is a great book, and I'm barely scratching the surface of it here. Buy a copy for every room in your house.
The eruption.
First off, the scientific facts. That there was huge climactic upheaval around the world after 535 AD is unquestionable- it's backed up by extensive dendrochronological evidence from all round the world. It's also highly likely to have been due to a volcanic eruption, going by the significant traces of volcanic action in ice-core samples dating from that time.
The question of where the eruption took place is actually fairly unimportant. After all, we all know the eruption of Tambora in the 19th century caused widespread climactic disruption around the world, but how many of us could pinpoint Tambora on a map? I couldn't. However, going by the historical records it's safe to go for East or South-East Asia, and most likely the "Ring of Fire" in the region of Indonesia. In that area, there's on infamous contender for the role- Krakatoa.
Krakatoa is a real oddball, and a dangerous one at that. It blew itself to smithereens in the explosion of 1883, but a new volcanic cone (Anak Krakatau) quickly rose in its place. The pattern of eruption appears to be a rapidly-growing cone, followed by mant centuries in a dormant state caused by plugging of the vent. Then an extremely violent eruption, followed by an underwater collapse of the caldera. Put simply, it's a very, very big bang.
So how could Krakatoa have caused such devastation in 535AD when the Tambora eruption of 1815 didn't? Tambora holds the official title as the largest ejection of volcanic matter into the atmosphere in recorded history- throwing out an estimated 100 cubic kilometres of matter into the air. However, it's estimated that the 535 eruption, based on observations of the caldera crater (see http://www.ees1.lanl.gov/Wohletz/Krakatau.htm for a detailed summary) threw up twice as much matter. Additionally, the undersea caldera collapse would also have thrown up a colossal amount of water vapour into the upper atmosphere, contributing to both greatly-increase cloud cover and extraordinarily heavy rainfall. Thirdly- Krakatoa explodes much more violently than Tambora (Tambora's blast was heard 2000 miles away, compared to 4000 miles away for the technically smaller Krakatoa blast of 1883), giving it the potential to hurl matter even higher into the atmosphere, causing more acute impacts on distant areas.
However, while this might all sound very convincing, in isolation it doesn't provide any sort of proof that this eruption actually had much impact on history. So for the next step you need to take a look at what was happening around the world up to a century after 535 AD....
This article revolves around the case presented by David Keys in his book "Catastrophe: An investigation into the origins of the modern world", which suggests that the "modern age" started in 535 AD with an eruption of Krakatoa. This eruption caused widespread climate change, resulting in floods, droughts and extreme low temperatures. In the aftermath, plague spreadacross the world. These factors destabilised old regimes all over the world, creating power vacuums into which new empires arose. Keys links this to the rise of Islam, the migration of the Avar to Europe (and the displacement of other people in the process), the rise of the Turks, the decline of Britain and Teotihuacan, the reunification of China and the rise of Buddhism in Japan.
"Catastrophe" is a great book, and I'm barely scratching the surface of it here. Buy a copy for every room in your house.
The eruption.
First off, the scientific facts. That there was huge climactic upheaval around the world after 535 AD is unquestionable- it's backed up by extensive dendrochronological evidence from all round the world. It's also highly likely to have been due to a volcanic eruption, going by the significant traces of volcanic action in ice-core samples dating from that time.
The question of where the eruption took place is actually fairly unimportant. After all, we all know the eruption of Tambora in the 19th century caused widespread climactic disruption around the world, but how many of us could pinpoint Tambora on a map? I couldn't. However, going by the historical records it's safe to go for East or South-East Asia, and most likely the "Ring of Fire" in the region of Indonesia. In that area, there's on infamous contender for the role- Krakatoa.
Krakatoa is a real oddball, and a dangerous one at that. It blew itself to smithereens in the explosion of 1883, but a new volcanic cone (Anak Krakatau) quickly rose in its place. The pattern of eruption appears to be a rapidly-growing cone, followed by mant centuries in a dormant state caused by plugging of the vent. Then an extremely violent eruption, followed by an underwater collapse of the caldera. Put simply, it's a very, very big bang.
So how could Krakatoa have caused such devastation in 535AD when the Tambora eruption of 1815 didn't? Tambora holds the official title as the largest ejection of volcanic matter into the atmosphere in recorded history- throwing out an estimated 100 cubic kilometres of matter into the air. However, it's estimated that the 535 eruption, based on observations of the caldera crater (see http://www.ees1.lanl.gov/Wohletz/Krakatau.htm for a detailed summary) threw up twice as much matter. Additionally, the undersea caldera collapse would also have thrown up a colossal amount of water vapour into the upper atmosphere, contributing to both greatly-increase cloud cover and extraordinarily heavy rainfall. Thirdly- Krakatoa explodes much more violently than Tambora (Tambora's blast was heard 2000 miles away, compared to 4000 miles away for the technically smaller Krakatoa blast of 1883), giving it the potential to hurl matter even higher into the atmosphere, causing more acute impacts on distant areas.
However, while this might all sound very convincing, in isolation it doesn't provide any sort of proof that this eruption actually had much impact on history. So for the next step you need to take a look at what was happening around the world up to a century after 535 AD....