Consider the following statements regarding the net radiation balance: 1. High latitudes get permanently frozen due to excess deficit of radiation. 2. Surplus heat energy from the tropics is redistributed polewards. 3. Tropics get progressively heated up despite the redistribution of heat. Which of the statements given above is/are correct?

Correct Option The correct option is 2 only Explanation The net radiation balance of the Earth is not uniform across all latitudes. There is a net surplus of radiation in the tropical and subtropical regions (roughly between 40° N and 40° S) and a net deficit in the high latitudes and polar regions. Statement-wise Analysis: - Statement 1 is Incorrect: To maintain a thermal equilibrium, the surplus heat energy from the tropics is redistributed polewards to the regions of deficit. This redistribution takes place through atmospheric circulation (planetary winds) and oceanic circulation (ocean currents). - Statement 2 is Correct: The high latitudes do not get permanently frozen or cool indefinitely because of this redistribution. The transfer of heat from the tropics compensates for the radiation deficit in the polar regions. - Statement 3 is Incorrect: The tropics do not get progressively heated up. The continuous transfer of excess heat towards the poles prevents the tropical regions from accumulating heat indefinitely, thereby maintaining a stable mean temperature. Key Takeaway: The latitudinal heat balance prevents the tropics from becoming excessively hot and the poles from becoming permanently frozen by redistributing energy via wind and water systems.

Consider the following statements regarding the net… - NCERT Class 11 Geography MCQ

NCERT Class 11 Geography — Chapter 2: Solar radiation, heat balance and temperature

mcqhard

Consider the following statements regarding the net radiation balance:

High latitudes get permanently frozen due to excess deficit of radiation.
Surplus heat energy from the tropics is redistributed polewards.
Tropics get progressively heated up despite the redistribution of heat.

Which of the statements given above is/are correct?

NCERT textbook question

From NCERT Fundamentals of Physical Geography · Page 4

Options

A1 and 3 only
B2 only
C1 only
D1, 2 and 3

Did you get this right?

Solution

Correct Option

The correct option is

2 only

Explanation

The net radiation balance of the Earth is not uniform across all latitudes. There is a net surplus of radiation in the tropical and subtropical regions (roughly between 40° N and 40° S) and a net deficit in the high latitudes and polar regions.

Statement-wise Analysis:

Statement 1 is Incorrect: To maintain a thermal equilibrium, the surplus heat energy from the tropics is redistributed polewards to the regions of deficit. This redistribution takes place through atmospheric circulation (planetary winds) and oceanic circulation (ocean currents).
Statement 2 is Correct: The high latitudes do not get permanently frozen or cool indefinitely because of this redistribution. The transfer of heat from the tropics compensates for the radiation deficit in the polar regions.
Statement 3 is Incorrect: The tropics do not get progressively heated up. The continuous transfer of excess heat towards the poles prevents the tropical regions from accumulating heat indefinitely, thereby maintaining a stable mean temperature.

Key Takeaway: The latitudinal heat balance prevents the tropics from becoming excessively hot and the poles from becoming permanently frozen by redistributing energy via wind and water systems.

Your note

More from Chapter 2: Solar radiation, heat balance and temperature

Consider the following statements regarding the insolation received at the Earth's surface: 1. Generally, at the same latitude, insolation is more over the continent than over the oceans. 2. In winter, the middle and higher latitudes receive more radiation than in summer. 3. The subtropical deserts receive more insolation than the equator. Which of the statements given above is/are correct?

medium

Which of the following is a characteristic of the isotherms in the Southern Hemisphere?

easy

With reference to the specific heat of land and water, consider the following statements: 1. The variation in temperature over the sea is much greater compared to land. 2. Land heats up and cools down more quickly than the sea. 3. Places near the sea experience extreme temperature variations. Which of the statements given above is/are correct?

easy

Which of the following is defined as "the energy needed to raise the temperature of one gram of substance by one Celsius"?

easy

In the context of the heat budget, what percentage of incoming solar radiation is reflected back to space before reaching the earth's surface?

easy

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