Solution:Doldrums are also known as also equatorial calms. These are equatorial regions of light ocean currents and winds within the Inter-tropical convergence zone.
Pressure Belts of Earth are zones of persistent high and low atmospheric pressure that shape global wind systems and weather patterns. They form because the Sun heats Earth’s surface unevenly, creating temperature and pressure contrasts between the
equator and the poles. These variations drive the circulation of air across latitudes. There are five major pressure belts:
Equatorial Low Pressure Belt (Doldrums): Found along the equator, where intense heat causes air to rise. This creates a low-pressure zone with calm conditions and little surface wind.
Subtropical High Pressure Belts: Located around 30°N and 30°S, where descending cool air produces high pressure. These regions are marked by clear skies, dry climates, and large desert belts.
Subpolar Low Pressure Belts: Found near 60°N and 60°S, where warm air from lower latitudes meets cold polar air. The rising air creates low pressure, frequent storms, and unsettled weather.
Polar High Pressure Belts: Present at the poles, where cold, dense air sinks, generating stable high pressure with dry and frigid conditions..