I always thought it was due to the Sahara, I often read about how Sahara sands turn European cities Orange during sandstorms, you'd think the same could be said about the weather
>>WhereI+(OP)
We get the orange dump from time to time but its not like we get it often.
The one time last year? it fell on winter snow was the only time I recall in last decade+, and on glaciers this layer is still clearly visible. Not many others imprinted there, just few from past decades.