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English: The 2021 Gulf of Mexico Hypoxic Zone, or Dead Zone, an area of low oxygen that can kill fish and marine life near the bottom of the sea, measures 2,116 square miles. This is the 3rd smallest dead zone in the Gulf since mapping of the zone began in 1985.
This year, the dead zone in the Gulf of Mexico entered into the top third of largest dead zones in records that go back 38 years, the National Oceanic and Atmospheric Administration said. The ...
Dead zones can be classified by type, and are identified by the length of their occurrence: [16] Permanent dead zones are deep water occurrences that rarely exceed 2 milligrams per liter. Temporary dead zones are short lived dead zones lasting hours or days. Seasonal dead zones are annually occurring, typically in warm months of summer and autumn.
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Firstly, it occurs in coastal zones where eutrophication has driven some quite rapid (in a few decades) declines in oxygen to very low levels. [2] This type of ocean deoxygenation is also called dead zones. Secondly, ocean deoxygenation occurs also in the open ocean. In that part of the ocean, there is nowadays an ongoing reduction in oxygen ...
Scientists prepare to collect near-bottom water aboard the R/V Pelican to verify oxygen measurements used to determine the size of the Gulf of Mexico hypoxic zone. (NOAA/LUMCON/LSU) A "dead zone ...
Tropical weather stirred up the Gulf of Mexico, reducing this year’s dead zone off Louisiana’s coast to the third-smallest ever measured, the scientist who has measured it since 1985 said Tuesday.
The use of "Sigsbee" for the feature originates from Commander Charles Dwight Sigsbee's Gulf of Mexico surveys that defined the general features of the body while he was commanding officer of the USC&GS George S. Blake. "Sigsbee Deep" applied to the entire deep basin appears on some of the earliest charts of the Gulf of Mexico.