What is hypoxia?
Hypoxia, or low oxygen, is an environmental phenomenon where the concentration of dissolved oxygen in the water column decreases to a level that can no longer support living aquatic organisms. Hypoxic areas, or “Dead Zones,” have increased in duration and frequency across our planet’s oceans since first being noted in the 1970s.
The largest hypoxic zone currently affecting the United States, and the second largest hypoxic zone worldwide, is the northern Gulf of Mexico adjacent to the Mississippi River.
Gulf hypoxia in the news:
Algal blooms that rob water of oxygen swirl across the Arabian Sea in 2015. New research indicates the sea has the world's largest low-oxygen 'dead zone.' Photo Credit: NASA Tristan Baurick / The [...]
Green algae swirls on the beach of Bandar al-Jissah in Oman on March 3, 2017. The Gulf of Oman turns green twice a year for about three months at a time, when an algae [...]
A US warship cruises through the Gulf of Oman. Photo: US Navy By George Dvorsky / Gizmodo April 27, 2018 Since the early 1960s, scientists have known about the so-called “dead zone” in [...]
By Doyle Rice / USA Today March 26, 2018 The annual “dead zone” in the Gulf of Mexico, which last year was the size of New Jersey, will continue for several decades, a new study said. A [...]
By JANET McCONNAUGHEY/ AP Mar. 22, 2018 NEW ORLEANS (AP) — The Gulf of Mexico’s “dead zone” will be an unwanted summer visitor for decades, Canadian scientists say. They say the oxygen-starved patch would persist [...]