For example, Asian monsoon has often been compared to a giant land-sea breeze. The seasonal variations of monsoon usually can be seen as the change of amplitude of long waves. Monsoon troughs are typically associated with low-level convergence and cyclonic vorticity, and cloudiness. The wind speeds between the high-pressure area and the monsoon trough are usually concentrated into a jet pattern. This is referred to as a monsoon jet, monsoon surge, a low-level jet, or a cross equatorial jet.
Features associated with the jet typically have local characteristics.
The monsoonal circulation has vertical structure. Monsoon Indices Monsoon indices have been developed to determine which areas of the world actually experience monsoons. These indices typically overestimate the monsoonal areas, including such regions as the Russian Arctic and the Gulf of Alaska. The Indian-Asian summer monsoon is the most widely studied. During the winter, the temperature typically decreases poleward of the equator.