Table of Contents
What is the Tri-cellular model of atmospheric circulation?
Tricellular Atmospheric Model The tricellular model explains the meridional circulation of the atmosphere. According to this model, the global air circulation can be divided into three cells. These cells have been divided based on the thermal and dynamic factors associated with the global air circulation.
What does the Tri-cellular model show?
The tri-cellular model shows how energy is transferred polewards via three cells of air circulation: the Hadley, Ferrel and Polar cells. The Hadley Cell involves the meeting of the trade winds in the Equatorial region, forming the Inter Tropical Convergence Zone (ITCZ).
How the Tri-cellular model explains these patterns?
The Tricellular Model is a simplified explanation of how atmospheric circulation patterns give rise to distinct weather and climatic conditions at various latitudes. It is based upon the premise of differential heating of the Earth’s surface.
How does the Tri-cellular circulation of the atmosphere assist in the transfer of energy?
The Tri-Cellular Model of Atmospheric Circulation shows how energy is redistributed across the globe and ensures there is not a surplus at the equator and deficit at the poles, which would be caused by the differential heating of the Earth’s surface by the Sun.
How do Ferrel cells work?
Ferrel cell – A mid-latitude atmospheric circulation cell for weather named by Ferrel in the 19th century. In this cell the air flows poleward and eastward near the surface and equatorward and westward at higher levels. Polar cell – Air rises, diverges, and travels toward the poles.
What causes Ferrel cells?
The Ferrel cell These winds pick up moisture as they travel over the oceans. At around 60 degrees N and 60 degrees S, they meet cold air, which has drifted from the poles. The warmer air from the tropics is lighter than the dense, cold polar air and so it rises as the two air masses meet.
How does the global atmospheric circulation model work?
The global atmospheric circulation model is based around cells. These cells are regions where the air moves from low pressure to high pressure. There are three cells in each hemisphere. Either side of the equator is the Hadley cell, with the Ferrell cell next and then the Polar cell at the top and bottom of the planet.
Why do meteorologists refer to a tri cellular of the atmosphere?
The tri-cellular model is a 2 dimensional model that give us a general understanding of how our atmosphere functions. It is a global scale model that is based entirely upon the fact that there are recognisable insolation differences between the Equator and the Poles.
Is Hadley cell low or high pressure?
The first cell is called the Hadley cell. At the equator, the ground is intensely heated by the sun. This causes the air to rise which creates a low-pressure zone on the Earth’s surface.
What is the difference between a Ferrel cell and a Hadley cell?
The circulation within the Ferrel cell is complicated by a return flow of air at high altitudes towards the tropics, where it joins sinking air from the Hadley cell. The Ferrel cell moves in the opposite direction to the two other cells (Hadley cell and Polar cell) and acts rather like a gear.
What is Hadley cell model?
Hadley cell, model of the Earth’s atmospheric circulation that was proposed by George Hadley (1735). It consists of a single wind system in each hemisphere, with westward and equatorward flow near the surface and eastward and poleward flow at higher altitudes.