Severe Weather ! ?? The streets of Saudi Arabia have turned into rivers ! Severe floods hits Bisha Saudi Arabia, of all places. Yea I know they get rain but severe floods? Speaking to a dancer yesterday he reckoned that the COVID bonus from reduced pollution was the cause. And having thought about it, I see a mechanism. Evaporation goes up as a gas, and will form ice crystals around nucleation sites - which particles of pollution, like PM2.5 eg, serve very effectively. So less pollution, longer up there and bigger deluges when it descends. Whoddathoughtit?
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