Sahara Desert Plume
Dust blowing off the Sahara Desert each winter makes its way across the Atlantic Ocean.
Rich in iron, the dust is a vital nutrient that helps sustain marine ecosystems, but can also trigger toxic blooms of algae, like red tides, that kill fish and damage corals.
It takes less than two weeks for a dust plume to lift off in Africa, cross the Atlantic, and settle in the Caribbean, the United States, or South America.
Saharan dust also finds its way into the Mediterranean, including Italy and Greece, and sometimes as far north as England.