A simplifed view of the Earth\'s atmosphere is an alternating series of Low-High

Question

A simplifed view of the Earth's atmosphere is an alternating series of Low-High pressure bands starting at the equator and going N and S. Complete the following of the diagram below -For (A) to (F), Choose the correct straight wind arrows connecting H and L pressures Bands where wind arrows run into each other (head to head) are called convergent zone (winds converge). Place you hands flat on your desk, fingers pointed towards each other with a gap between them. Now slide them towards each other. As you push your finger tips together, and they converge what direction do they want to move, up or down? The desk is acting like the earth surface relative to your fingers (the wind). Converging winds uplift because they can't move through the Earth. Bands where wind arrows move away from each other (tail to tail) are called divergent zone (winds diverge). Put your hands flat on your desk, finger tips touching, place this paper on top of your hands. Now slide your hands apart (diverge them). What happens to the paper? Does it rise or fall? Diverging winds sink because gravity pulls the paper down, just like gravity pulls down on the atmosphere -For (a) to (e), choose "converging winds uplift" or "diverging winds sink

Explanation / Answer

A- (2) Southward Arrow connecting the cold poles causing a polar high in the Northern Hemisphere to the sub polar low.

a- (4) Converging winds uplift, the converging surface air at the Subpolar low is wamer than both the Polar surface air or the Subtropical high surface air and thus rises and thus forming a low pressure belt.

B- (3) Northward Arrow connecting the Subtropical high in the Northern hemisphere to the Sub Polar low

b- (1) Diverging winds Sink, the warm air risen from the equator travels to the subtropical high in the Northern hemisphere and is cooled enough to be a relatively high pressure thus again travelling back to the equator(lower pressure) along the surface. Similaryl the air risen from the sub polar low cools enough at the Sub tropical high to sink and travel back to the subpolar low along the surface

C- (2) Southward Arrow connecting the Subtropical high in the Northern Hemisphere to the Equitorial low

c- (4) Converging winds uplift, the converging surface air at the equator warms up to rise and lower the pressure

D- (3) Northward Arrow connecting the Subtropical high in the southern hemisphere to the Equitorial low

d- (1) Diverging winds Sink, the warm air risen from the equator travels to the subtropical high in the southern hemisphere and is cooled enough to be a relatively high pressure thus again travelling back to the equator(lower pressure) along the surface.

E- (3) Southward Arrow connecting the Subtropical high in the Southern hemisphere to the Sub Polar low

e- (4) Converging winds uplift, the converging surface air at the Subpolar low is wamer than both the Polar surface air or the Subtropical high surface air and thus rises and thus forming a low pressure belt.

F- (3) Northward Arrow connecting the cold poles causing a polar high in the Northern Hemisphere to the sub polar low.

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