Coastal Upwelling:
What is Coastal Upwelling:
Video 2: Green Sea Upwelling. (2010). What is Oceanic Upwelling. http://www.greenseaupwelling.com/Upwelling.html. Last accessed 22nd Mar 2014.
Is a flash animation which shows the process in which the natural process of Coastal Upwelling occurs. As seen in the video, currents move along a coastline to push surface water perpendicular to the wind away due to a process called Ekman transport, then water from deep water rises to replace it. The wind must be parallel to the coast in order for costal upwelling to occur, this is because water is deflected to the left of the wind in the southern hemisphere, and the right of the wind in the northern hemisphere. (Coriolis force)
Is a flash animation which shows the process in which the natural process of Coastal Upwelling occurs. As seen in the video, currents move along a coastline to push surface water perpendicular to the wind away due to a process called Ekman transport, then water from deep water rises to replace it. The wind must be parallel to the coast in order for costal upwelling to occur, this is because water is deflected to the left of the wind in the southern hemisphere, and the right of the wind in the northern hemisphere. (Coriolis force)
Locations:
Figure 19: Green Sea Upwelling. (2010). What is Oceanic Upwelling. http://www.greenseaupwelling.com/Upwelling.html. Last accessed 22nd Mar 2014.
Figure 19 is a world map, illustrating where coastal upwelling occurs as red regions along the coast line of the continents. From this figure, we can see that coastal upwelling mostly occurs at the edges of North America and Africa. Areas where upwelling occurs is usually abundant with marine life and and account for 50% of the total fisheries catch in the world. There are 5 major coastal currents correlated to upwelling,
the Canary Current ( Northwest Africa), the Benguela Current (southern Africa), the California Current(California and Oregon), the Humboldt Current ( Peru and Chile), and the Somali Current ( Somalia and Oman).
Example:
The Humboldt Current is the world's most productive marine ecosystem, as well as the largest upwelling system.
There are 3 local species of fish:
-Anchoveta
-Sardine
-JurelApproximately 18-20% of the world’s fish catch comes from the Humboldt Current LME. (Large Marine Ecosystem)
Figure 19 is a world map, illustrating where coastal upwelling occurs as red regions along the coast line of the continents. From this figure, we can see that coastal upwelling mostly occurs at the edges of North America and Africa. Areas where upwelling occurs is usually abundant with marine life and and account for 50% of the total fisheries catch in the world. There are 5 major coastal currents correlated to upwelling,
the Canary Current ( Northwest Africa), the Benguela Current (southern Africa), the California Current(California and Oregon), the Humboldt Current ( Peru and Chile), and the Somali Current ( Somalia and Oman).
Example:
The Humboldt Current is the world's most productive marine ecosystem, as well as the largest upwelling system.
There are 3 local species of fish:
-Anchoveta
-Sardine
-JurelApproximately 18-20% of the world’s fish catch comes from the Humboldt Current LME. (Large Marine Ecosystem)
Effect:
Surface water are often depleted of nutrients such as nitrate and phosphate that are essential to plant growth. On the other hand, deep waters are rich in nutrients such as nitrate and phosphate as a result of decomposition of organic matter. When these nutrients rise to the surface because of upwelling, this stimulates the growth of phytoplankton. Upwelling is an essential process which replenishes nutrients in the surface water, allowing for the functioning of biological productivity. Approximately 25% of the total global marine fish catches come from five upwellings that occupy only 5% of the total ocean area.
In addition, animal movement can be affected by coastal upwelling. Tiny larvae of developing fish can drift in the ocean because of the ocean currents for long periods of time.
In addition, animal movement can be affected by coastal upwelling. Tiny larvae of developing fish can drift in the ocean because of the ocean currents for long periods of time.