Doldrums refer to a quiet area along the equator where the
wind doesn’t blow for long periods of time.
The trade winds are characterized by the steadiness of their
direction and speed, especially over the oceans. The jet stream refers
to a narrow current of strong westerly winds in the upper troposphere.
The polar easterlies refer to an easterly wind belt found between the
weak polar high pressure area and the westerly depression. The trade
winds are predominately easterly winds that blow steadily over the ocean
areas. The westerly winds are strong winds blowing from the west.