Episode 505 - Complex ocean currents sustaining life across the depths

Ocean currents can have global impacts shaping our climate and life in the seas and onshore. How do the ocean currents circulate and vary not just on the surface but beneath the waves? It's easy to picture different layers of clouds, but the same is true for our oceans. Large circulating patterns of currents called Gyres govern the oceans. Tiny phytoplankton keep our oceans alive but how do they get enough food themselves? The middle of a gyre gets baked in sun and seems to lack nutrient sources, so how do microbes survive there? When phytoplankton die they rain down nutrients and carbon to lower layers of the ocean as marine snow.

1. Mukund Gupta, Richard G. Williams, Jonathan M. Lauderdale, Oliver Jahn, Christopher Hill, Stephanie Dutkiewicz, Michael J. Follows. A nutrient relay sustains subtropical ocean productivity. Proceedings of the National Academy of Sciences, 2022; 119 (41) DOI: 10.1073/pnas.2206504119