Consider the following statements 1 Maximum insolation is received over the subtropic...........

Geography World climates

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Consider the following statements:

1. Maximum insolation is received over the subtropical deserts

2. Equator receives less insolation than the tropics

3. Annual insolation received is more on January 3rd than 4th July due to perihelion

Which of the above are true?

All of the above

1 and 2

1 and 3

2 and 3

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Explanation:

The amount of insolation received on the earth’s surface is not uniform everywhere. It varies according to the place and time. When the tropical regions receive maximum annual insolation, it gradually decreases towards the poles. The major factors which influence the amount of insolation received are:

Rotation of the earth on its axis

The angle of incidence of the sun’s rays

Duration of the day

Transparency of the atmosphere

Maximum insolation is received over the subtropical desert, where the cloudiness is the least. The equator receives comparatively less insolation than the tropics. Generally, at the same latitude, the insolation is more over the continent than over the oceans. In winter, the middle and higher latitudes receive less radiation than in summer.

During the earth’s revolution around the sun, the earth is farthest from the sun on 4th July. This position of the earth is called aphelion. On 3rd January, the earth is nearest to the sun. This position is called perihelion.

Due to this variation in the distance between the earth and the sun, the annual insolation received by the earth on 3rd January is slightly more than the amount received on 4th July.