The team examined the chemical composition of ocean sediments near today’s largest ocean dead zone, located in the eastern Pacific Ocean. The team obtained sediment samples—the “history books” of ...

Oxygen-deficient zones in the open oceans shrank during long warm periods in the past, contrary to widespread expectations. This has significant implications for the oceans under human-driven global ...

The climate crisis poses a threat to the rich biodiversity of life that exists in the ocean’s twilight zone, which exists just beyond the reach of sunlight. Life in this region could be reduced ...

Ocean 'Dead Zones' Have Quadrupled Since 1950. By Allison Eck Friday, January 5, 2018 NOVA Next NOVA Next. Algal blooms, like this one in the South Atlantic Ocean, draw oxygen out of water.