The concept of Intra – tropical convergence has been propounded by German meteorologist Flohn. In this concept, the process of front formation has been related to the conjunction of trade winds flowing towards equatorial low air pressure belt. Monsoon originates with help of these fronts. This front shifts towards the north in summer season, so rainfall is received in the form of summer monsoon.
While it shifts towards the south in winter season, and due to this condition, anti cyclonic condition generates and north – east monsoon gets spread in India. Thus, Flohn describes the concept of Intra – tropical convergence that the seasonal change in the direction of Monsoon winds is not due to thermal reasons, rather it is a symbol of re – establishment of trade winds in the planetary wind system.
