Year 580 Numidian historian Procope, in Byzancio, observed so dense clouds coming from the East and wondered if it's an unpredicted eclipse. It's the implosion of Rabaul volcano, in Papuasia, that left a 40km-caldera (Nasa photo). I think this enormous mass of micro particules provoqued a terrible climate change, that dried up Felix Arabia and the Sahara savan. And it lasted for centuries. A proof of it is the culture of the pastel plant (isiatis tinctorial). It comes from the middle mountains steppes of Central Asia. Chinese used it to fight heat shock, as a medicinal plant. Arabs managed to distillate it and found that blue colorant that resist sun. That's how Omeyades bring the plant in the Sahara desert and show Tuaregs how to do clothes that cure them from the sun. But soon, Sahara was drying up so they had to grow pastel north, by Mediterraneo Sea and soon, they had to cross the sea, to grow it in Grenade but the plant wasn't doing well, so they went up to Occitania to grew pastel. It worked for some centuries until again the plants were dying. The war against Cathars was launched because French suspected they had colorant treasures and reserves but didn't want to sell them. Because blue was a big business, in brown, earthian middle ages. And even for black, you needed to taint it blue before to resist the sun. After three centuries of killing and stealing, French decided to plant it in Northern France (Baie de Somme), and it worked well. But, at least, by 15th c.AC, climate went softer and they could again grow pastel in Occitania. 200 years later, Hollandeses would win over everybody, bringing back Javanese indigo and planting it in Africa.
What I really wonder is what happen to them. Those volcanic microparticles with almost no weight don't fall down either they can't escape earth's magnetic field. I think they interact with sun particles that fuel them endlessly and provoke high altitude electric storms. But, on Earth, a plant had to be grown always north (that's the way we nowadays spot climate changes), from Sahara up to Baie de Somme, almost 5000km.
What I read is they eventually sediment out of stratosphere, but as far I miss information and formation, could you explain me on what do they sediment and why? how do they manage to go out stratosphere? and once sedimented, what happens?
What felt on Pompei were ashes and volcanic stones and toxic gazes that killed everybody around. I was speaking about micro particles much lighter than ashes, like the ones stratospheric volcano Agung is spitting high by now.
And those microparticles are electrically charged, so they interfere with light particles. Electric activity is enough to maintain them while provoking high-altitude strikes that ended up in forest fires. Those particles aggregate water in suspension, so clouds are too far from Earth to produce rains. And one more thing: the observation of how a culture have to be grown always more north indicates climate change. From Sahara to Flanders, there's almost 5000km.
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