"Some scientists said the reason behind the massive seaweed increase began as early as 2011, when ocean temperatures warmed and changes in ocean currents occurred because of climate change. Other researchers claim increased land-based nutrients and pollutants washing into the water, including nitrogen-heavy fertilizers and sewage wastes, helped fuel the algae blooms. There are also a number of scientists that have linked the sargassum influx to a high flow of nutrients from South Americas Amazon and Orinoco Rivers mixing with warmer ocean temperatures. "T I wonder if there is some scientific explanation other than just blaming it on Global Warming?
What Is Sargassum? Smelly Seaweed Invasion Declared An Emergency In The Caribbean
Another interesting read: Beautiful Caribbean beaches now a smelly mess after massive seaweed invasion - The Washington Post
Makes me wonder if Cozumel will maybe benefit in some fashion from having so much of the infrastructure on the west side protected from much of it most of the time?