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The biomass of phytoplankton and the presence of cool water in those regions allow upwelling zones to be identified by cool sea surface temperatures (SST) and high concentrations of chlorophyll a. [2] [3] The increased availability of nutrients in upwelling regions results in high levels of primary production and thus fishery production.
An oxygen minimum zone (OMZ) is characterized as an oxygen-deficient layer in the world's oceans. Typically found between 200 m to 1500 m deep below regions of high productivity, such as the western coasts of continents. [1] OMZs can be seasonal following the spring-summer upwelling season.
As low oxygen zones expand vertically nearer to the surface, they can affect coastal upwelling systems such as the California Current on the coast of Oregon (US). These upwelling systems are driven by seasonal winds that force the surface waters near the coast to move offshore, which pulls deeper water up along the continental shelf. As the ...
Located in the submerged coastal zone of the Red River Delta, it has been declared as a Ramsar Wetland site. [31] [32] It has 120 species of vascular plants and 111 species of water plants. As a migratory bird habitat, it is a staging and wintering area for shorebirds, gulls and waterfowl in the coastal zone of the Red River Delta.
Evidence has shown that eddy pumping-induced upwelling and downwelling may play a significant role in shaping the way that carbon is stored in the ocean. Despite the fact that research in this field is only developing recently, first results show that eddies contribute less than 5% of the total annual export of phytoplankton to the ocean interior.
Dầu Tiếng is a rural district of Bình Dương province in the Southeast region of Vietnam. As of 2003, the district had a population of 92,592. [1] The district covers an area of 720 km 2. The district capital lies at Dầu Tiếng township. [1] The district had a base with the same name during the war in Vietnam.
The Mekong Delta (Vietnamese: Đồng bằng Sông Cửu Long, lit. 'Nine Dragon River Delta' or simply Đồng Bằng Sông Mê Kông, 'Mekong River Delta'), also known as the Western Region (Vietnamese: Miền Tây) or South-western region (Vietnamese: Tây Nam Bộ), is the region in southwestern Vietnam where the Mekong River approaches and empties into the sea through a network of ...
The presence of nutrients as well as coastal fronts, eddies, and upwelling zones greatly increase the persistence of thin layers. One of the main criteria for an aggregation of plankton to be considered a thin layer is that the increased concentration at a certain depth of the water column must appear in subsequently measured profiles.