Intertropical Convergence Zone

This NASA satellite image shows the Inter-Tropical Convergence Zone, known to sailors around the world as the doldrums. Known to sailors around…

<!-- What are the trade winds? …

The Charles W. Morgan is the last of an American whaling fleet that once numbered more than 2,700 vessels. Ships like the Morgan often used routes defined by the trade winds to navigate the…

<!-- What are the Roaring Forties? …

A research vessel braves the strong westerly winds of the Roaring Forties during an expedition to measure levels of dissolved carbon dioxide in the surface of the ocean. …