The zones can occur on a large scale, as at the equator, or at local level, causing showers and storms
Convergence zones are meteorological boundaries where two flows meet, forcing air upwards. This vertical movement of air leads to the formation of clouds, and heavy precipitation often follows on.
Convergence zones are a global phenomenon and can occur on a large scale, with one such example being the Intertropical Convergence Zone, or ITCZ for short. The ITCZ is an area around the equator where the northern and southern hemisphere trade winds meet, creating huge amounts of uplift resulting in a band of heavy rain and thunderstorms around the equator. The ITCZ influences the wet and dry seasons in the equatorial region, including the monsoons.