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1452-53 event[edit]

Sulfur dioxide emissions by volcanoes.
Solar radiation reduction due to volcanic eruptions

Kuwae might not be linked to the 1452-53 event (Nemeth K, Cronin SJ, White JDL (2007). "Kuwae caldera and climate confusion". The Open Geology Journal. 1: 7–11. doi:10.2174/1874262900701010007.  ). Tofua Caldera, Tonga is cited as a candidate. On the other side the paper is probably wrong too. Non-volatile sulfuric acid is just determined in the ice core, sulfur dioxide is enough for a volcanic winter (Robock, A., C.M. Ammann, L. Oman, D. Shindell, S. Levis, and G. Stenchikov (2009). "Did the Toba volcanic eruption of ~74k BP produce widespread glaciation?". Journal of Geophysical Research. 114: D10107. doi:10.1029/2008JD011652.  ). Basalt floods emit sulfur dioxide too (1783-1785 event), everything needs not to be emitted in one only eruption (sulfur dioxide is a reducing agent, a large sulfur dioxide emission, is measured as a sulfuric acid ice core spike in the North and the South Pole). Sulfur dioxide (boiling point at standard state: -10°C) reacts with water vapor, it creates sulfate ions (the precursors to sulfuric acid, Earth Observatory - Sarychev Eruption [1]). I hope that I'm right, though. --Chris.urs-o (talk) 15:54, 24 February 2010 (UTC)

The date[edit]

Pls note ([2]):

22 May, when it had interrupted a great battle raging at the city of Constantinople. The great “fire” that had been set by Turkish attackers was really just the reflection of ash in the twilight.

Petrochen (talk) 02:39, 7 July 2017 (UTC)

External links modified (January 2018)[edit]

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