What causes divergence in the ocean?
Because of Ekman transport, an anticyclonic circulation causes a convergence of surface waters and a cyclonic circulation a divergence. In (a) there is a divergence at the surface which depresses the surface of the ocean and raises water from beneath the thermocline towards the surface (upwelling).
Where do ocean currents converge?
Counter Currents flow along the surface whereas Under Currents flow at greater depths below the surface. The trade winds of the two hemispheres converge in a narrow east-west zone located near the equator known as the Intertropical Convergence Zone (ITCZ).
What is convergence in oceanography?
To summarize: convergence usually means downwelling, divergence usually means upwelling, and upwelling frequently (but not always) is associated with enhanced biological productivity. Page 4. Convergence zones are of interest to oceanographers for several reasons.
What is divergence and convergence?
Divergence generally means two things are moving apart while convergence implies that two forces are moving together. Divergence indicates that two trends move further away from each other while convergence indicates how they move closer together.
Where does most downwelling occur?
poles
Where does most downwelling occur? Most downwelling happens at the poles. There, cold air chills the water. The water brought in by the surface gyres is pretty salty already, because it comes from the tropics, where evaporation increased salinity.
What does ocean downwelling do to surface waters?
Upwelling is a process in which deep, cold water rises toward the surface. Upwelling occurs in the open ocean and along coastlines. The reverse process, called “downwelling,” also occurs when wind causes surface water to build up along a coastline and the surface water eventually sinks toward the bottom.
In which ocean does the Labrador Current Flow?
North Atlantic Ocean
Labrador Sea, northwestern arm of the North Atlantic Ocean, between Labrador, Canada (southwest), and Greenland (northeast). It is connected with Baffin Bay (north) through Davis Strait and with Hudson Bay (west) through Hudson Strait.
Where is downwelling most common?
Where does most downwelling occur? Most downwelling happens at the poles. There, cold air chills the water. The water brought in by the surface gyres is pretty salty already, because it comes from the tropics, where evaporation increased salinity.
What is the difference between divergent and convergent?
The main difference between convergent evolution and divergent evolution is that convergent evolution is the development of similar features in two species with different ancestral origins whereas divergent evolution is a process where two different species share a common ancestor.
Which is the best description of a convergent divergent nozzle?
Nozzle is a device designed to control the rate of flow, speed, direction, mass, shape, and/or the pressure of the Fluid that exhaust from them. Convergent-divergent nozzle is the most commonly used nozzle since in using it the propellant can be heated incombustion chamber.
Which is the simplest form of convergence and divergence?
The simplest form of convergence and di-vergence is the type that results from wind direction alone. Two flows of air brought together, no matter what the angle, result in convergence. Where the air flow splits and winds go in different directions, divergence is occurring. Figure 8-4-2 illustrates these types of convergent and divergent air flow.
How are jet streams related to convergence and divergence?
Convergence is the accumulation of air in a region or layer of the atmosphere, while levels. Coincidently, this is also the layer of maximum winds in the atmosphere; cores of jet streams are usually found here. These high-speed winds are directly related to convergence and divergence.
How does convergence take place in a low pressure system?
The flow patterns range from simple to complex. In order for convergence to take place, the winds must be such as to result in a net inflow of air into a layer or region. At the surface, low-pressure systems are associated with con-vergent flow.