How are convection currents and slab pull related to each other?
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As one plate subducts, it sets up convection currents in the upper mantle that ‘exert a net trenchward pull’ ie, acts to suck both the plates together (Wilson, 1993). Associated with the slab suction force is the idea of trench roll-back.
What is convection current How does it form land and sea breeze?
The air above the sea being warmer , expands, rises up and convection currents of cold air flow from the land towards the sea, forming land breezes. In the evening , air above the land, being more heated, expands, rises up and the colder air from above the sea surface blows towards the land to take its place.
What causes convection currents in the ocean?
The heating of the Earth’s surface and atmosphere by the sun drives convection within the atmosphere and ocean. This convection produces winds and ocean currents. The greater the pressure differences between a low-pressure area and a high-pressure area, the stronger the winds.
How did convection currents in the mantle cause the breakup of Pangaea?
Scientists believe that Pangea broke apart for the same reason that the plates are moving today. The movement is caused by the convection currents that roll over in the upper zone of the mantle. This movement in the mantle causes the plates to move slowly across the surface of the Earth.
How do convection currents cause sea breeze?
The ground heats the air above it, which rises in convection currents and cooler air from over the ocean flows toward the shore to “fill in the gap” left by the rising warm air. This flow of cooler air from the ocean toward the shore creates what is known as a sea breeze.
What causes the convection from sea to land?
Since the sea water radiates less heat than the land, it remains hotter than the land part. Hence the cold air from the land goes through the convection process of air to the seawater and this flow of air is called the Land Breeze. The sea breeze and the land breeze is caused by the convection current of air.