Seasonal & Latitudinal Variation Flashcards

0
Q

Day and night occur because of

A

Earths anticlockwise rotation. A full rotation is 24 hours.

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1
Q

Seasonal: (2)

A

Earths axis tilt of 23.5’ means that one hemisphere is closer to the sun, whilst the other is further away.

Latitudes higher than 67’ experience either 24h daylight or darkness.

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2
Q

At higher latitudes, terrestrial radiation lost to space is

A

More than the amount of SR received.

Vise versa for lower latitudes.

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3
Q

Outgoing terrestrial radiation and incoming SR is equal at

A

Around 35’ N and 40’ S

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4
Q

In a frontal depression, the magnitude of flow =

A

Wind strength x air temperature

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5
Q

Latitudinal variation: (3)

A

Poles receive less SR, equator receives more.

At high latitudes, the sun is never directly overhead, meaning the SR is spread over a greater surface area.

The SR has to pass through more atmosphere at polar regions, therefore the atmosphere adsorption is increased.

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6
Q

The radiative excess equator ward means that

A

More SR is absorbed than TR is lost.

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7
Q

The radiative deficit polewards means that

A

More TR is lost than SR is absorbed.

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8
Q

The inbalance of SR and TR needs to be balanced:

A

Heat is transported from the tropics to the poles, thus warming the poles and cooling the tropics.

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9
Q

The annual excess and deficit vary with seasonal change,

A

SR varies greatly in higher latitudes, with the shift from polar day to polar night.

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10
Q

In winter, the atmosphere has to work twice as hard to transport heat to the poles, this results in

A

Deeper frontal depression systems and therefore windier conditions.

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