Silicates coming either from the deserts such as Sahara for Atlantic and Goby for pacific typhoons. Also from vulcanos erruption.
After 2010 Icelandic vulcano erruption concentration of the hurricanes in atlantic is rated the strongest for 2011-to present if i correct.
After hawaii vulcano erruption they had two stroms in that area within short period of time, which is not very common thing.
More silicates over warm water areas, higher hurricanes development.