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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 ). I hope that I'm right, though. --Chris.urs-o (talk) 15:54, 24 February 2010 (UTC)
Pls note ():
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.
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