Known to sailors around the world as the lsquo doldrums rsquo these are 1 Exist at the edge of the t...........

Geography and Environment (HAS) World climates

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Known to sailors around the world as the ‘doldrums’, these are

1. Exist at the edge of the tropics

2. Also known as the Inter-Tropical Convergence Zone

3. Popular for high wind speeds throughout the year

Select the correct answer using the codes below.

1 only

2 only

1 and 3 only

2 and 3 only

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Explanation:

Statement 1 and 2: It is a belt around the Earth extending approximately five degrees north and south of the equator. Here, the prevailing trade winds of the northern hemisphere blow to the southwest and collide with the southern hemisphere’s driving northeast trade winds.

Statement 3: Due to intense solar heating near the equator, the warm, moist air is forced up into the atmosphere like a hot air balloon. As the air rises, it cools, causing persistent bands of showers and storms around the Earth’s midsection. The rising air mass finally subsides in what is known as the horse latitudes, where the air moves downward toward Earth’s surface.Because the air circulates in an upward direction, there is often little surface wind in the ITCZ. That is why sailors well know that the area can becalm sailing ships for weeks. And that’s why they call it the doldrums.