Question

Where and why are the trade winds unable to cause rainfall

Answer 1

Winter Monsoon

During the winter season, North-East trade winds prevail over India. They blow from land to sea and that is why that for most part of the country, it is a dry season. A part of North-East trade winds blow over Bay of Bengal. They gather moisture which causes rainfall in the Coromandal coast while the rest of the country remains dry. Strictly speaking these winds are planetary winds known as Northeast Trades. In India they are essentially land bearing winds.

Summer Monsoon

The average maximum temperature is above 33°C in the month of May at Delhi, Jodhpur and Jaisalmer. Such high temperature heats up the air of that region. Hot air rises and due to this a low pressure area is created under it. This low pressure is also known as monsoonal trough. It lies between western Rajasthan to Odisha.

Answer 2

Explanation:

The Intertropical Convergence Zone, known by sailors as the doldrums or the calms because of its monotonous, windless weather, is the area where the northeast and southeast trade winds converge. It encircles Earth near the thermal equator, though its specific position varies seasonally.