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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.
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 ...
The Gulf of Thailand is bordered by Cambodia, Thailand, Malaysia, and Vietnam. [ 7 ] [ 8 ] It occupies a seabed area of 304,000 km 2 from 6° N to 13°30' N latitude and 99°E to 104° E longitude. [ 9 ] : 250 The northern tip of the gulf is the Bay of Bangkok at the mouth of the Chao Phraya River .
Thailand's coastline and 300 small islands are home to 153 square kilometers of coral. [8] [9] Large bleaching events in 1998 and 2010 resulted in the massive loss of corals in the Gulf of Thailand, but some corals showed resilience to the events and displayed a lower mortality. [10]
A 'dead zone' off the Gulf coast is larger than NOAA predicted. The massive area poses danger to marine life, and recovery could take decades. A 'dead zone' is growing in the Gulf of Mexico.
The area is described in NGA Pub. 161, Sailing Directions (Enroute) South China Sea and the Gulf of Thailand. [1] The navigational charts and sailing directions do not completely agree with each other as to the boundary.
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 ...
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