Answer the following Questions Briefly:

Write a short note on:

a. Tradewinds.

b. Roaring Forties

(a) Trade winds blow from the subtropical high-pressure belt to the Equatorial low-pressure belt in Northern and Southern hemisphere. They blow in a constant direction throughout the year and in a regular manner. These winds are named so because these are helpful for the traders while sailing in the sea. While travelling over the vast oceans these winds carry more moisture thus bringing heavy rainfall on the East Coast of the continents. They do not give any rainfall as they move westwards.

(b) Westerlies are the permanent winds which blow from South West to North East in the northern hemisphere and North West to South East in the southern hemisphere. The velocity of the westerlies becomes so fast and vigorous to be called as "roaring forties" at 40-degree latitude.