Understanding Trade Wind Characteristics

Trade winds are significant global wind patterns that blow consistently from east to west near the equator. They are a crucial part of the Earth's atmospheric circulation.

Let's examine the characteristics mentioned in the statements:

• Statement (a): In the Northern hemisphere they blow from South-east.

  This statement describes the direction of trade winds in the Southern Hemisphere, not the Northern Hemisphere. In the Southern Hemisphere, the Coriolis effect deflects winds to the left, causing them to blow from the southeast towards the equator.

• Statement (b): In the Northern hemisphere they blow from North-east.

  This statement correctly describes the direction of trade winds in the Northern Hemisphere. These winds originate from the subtropical high-pressure belts and blow towards the equatorial low-pressure belt. The Coriolis effect deflects these winds to the right in the Northern Hemisphere, resulting in a northeast direction (blowing from the northeast).

• Statement (c): They blow with great regularity.

  Trade winds are known for their remarkable consistency in both direction and speed throughout the year, especially over the oceans. This regularity made them historically important for sailing ships crossing the Atlantic and Pacific oceans. Therefore, this statement is correct.

Based on the analysis:

• Statement (a) is incorrect.
• Statement (b) is correct.
• Statement (c) is correct.

The characteristics of trade winds that are correct are that in the Northern Hemisphere they blow from North-east and they blow with great regularity.

Thus, only statements (b) and (c) are correct.