What causes divergence in the ocean?

What causes divergence in the ocean?

In the oceans, plates move apart at mid-ocean ridges. Lava rises upward, erupts, and cools. Later, more lava erupts and pushes the original seafloor outward.

What is Surface convergence?

At the surface, low pressure systems have a counterclockwise rotation in the Northern Hemisphere, with the wind turning slightly inward towards the lowest pressure. This causes air to converge, or come together, at the center of the low near the ground. Since the converging air has nowhere else to go, it rises.

What is convergence in the ocean?

in the ocean, zones where the surface waters of the ocean come together. They develop owing to unevenness in the wind field above the ocean and in the distribution of water density.

What is surface circulation?

Surface circulation carries the warm upper waters poleward from the tropics. Heat is disbursed along the way from the waters to the atmosphere. At the poles, the water is further cooled during winter, and sinks to the deep ocean. This is especially true in the North Atlantic and along Antarctica.

Is Oceanic Oceanic or divergent?

Oceanic-Oceanic Plate Divergence is the divergence of plate boundaries of oceanic plates. This forms a mid-oceanic ridge, which is a central ridge structure that divides the ocean basin in half. The newly formed rocks are closest to the mid-oceanic ridge and are therefore younger than those further away.

What is ocean circulation generally driven by?

Ocean currents are driven by wind, water density differences, and tides. Oceanic currents describe the movement of water from one location to another.

What does surface convergence cause?

In CISK, surface convergence (pink horizontal arrows) causes rising motion around a surface cyclone (labeled as “L”). The air cools as it rises (red vertical arrows) and condensation occurs, which releases latent heat into the atmosphere. This heating causes air to expand, creating an area of high pressure aloft.

What kind of vertical motion is surface convergence usually associated with?

Divergence aloft is associated with rising air throughout the troposphere, which is associated with low pressure and convergence at the surface. Convergence aloft is associated with sinking air throughout the troposphere, which is associated with high pressure at the surface and thus divergence at the surface.

Does convergence causes a raised sea surface?

The drift of water into the centre of the gyre causes a surface convergence that pools water and actually raises the surface of the ocean by approximately a metre.

What is convergence associated with?

A convergence zone in meteorology is a region in the atmosphere where two prevailing flows meet and interact, usually resulting in distinctive weather conditions. Large-scale convergence, called synoptic-scale convergence, is associated with weather systems such as baroclinic troughs, low-pressure areas, and cyclones.

What causes the surface ocean circulation?

Large-scale surface ocean currents are driven by global wind systems that are fueled by energy from the sun. These currents transfer heat from the tropics to the polar regions, influencing local and global climate.

Which is a result of Ocean-Ocean convergence?

A line of volcanoes, known as the Aleutian Islands, is the result of ocean-ocean convergence. In this satellite image is an erupting volcano, topped by snow or ice, and surrounded by seawater – a member of the Aleutian chain.

What happens when two plates meet at a convergent plate boundary?

If the two plates that meet at a convergent plate boundary both are of oceanic crust, the older, denser plate will subduct beneath the less dense plate. The features of an ocean-ocean subduction zone are the same as those of an ocean-continent subduction zone, except that the volcanic arc will be a set of islands known as an island arc.

What happens in an ocean-ocean subduction zone?

The features of an ocean-ocean subduction zone are the same as those of an ocean-continent subduction zone, except that the volcanic arc will be a set of islands known as an island arc. The older plate subducts into a trench, resulting in earthquakes. Melting of mantle material creates volcanoes at the subduction zone.

What happens when oceanic crust meets continental crust?

We explored what happens when oceanic crust meets continental crust. Another type of convergent plate boundary is found where two oceanic plates meet. In this case the older, denser slab of oceanic crust will plunge beneath the less dense one.