pressure cells on Earth?

Question

Ok, so there are four pressure cells on Earth right? The Equatorial low pressure Trough, polar high pressure cells, subtropical high pressure cells, and the subsolar low pressure cells. What are the characteristics of all these?

Answer 1

The equatorial low pressure area is called Doldrums and is characterised by calm winds.The high pressure belts at about 30 degrees North and South are called Horse latitudes and characterised by calm or light variable winds and clear weather.The low pressure belts at about 60 degrees North and South are the subpolar low pressure regions where depressions form and move towards east.Little is known about the winds in the polar high pressure regions.Probably they are Notheast in the Arctic and Southeast in the Antarctic.With changes in the seasons, the above belts swings north and south by 5 to 10 degrees of latitude.
About the winds, the winds between the horse latitude and the doldrums are called Trade winds and they are easterlies.The winds between the horse latitudes and the subpolar low belt are Westerlies.In the souther hemisphere they are very strong and are called Roaring forties.Between this subpolar low belt and high pressure area over the poles,polar easterlies are experienced.Depending upon the land and sea distribution ,land areas get warmer in the summer and become more cooler in the winter than the sea areas.Hence a surface low will be created in summer and high in the winter over land areas.Accordingly the wind system between these belts also gets modified.