What is the low pressure zone at the equator called?

What is the low pressure zone at the equator called?

the doldrums
A low-pressure area of calm, light variable winds near the equator is known to mariners as the doldrums. The circulation pattern of the Earth’s atmosphere. Most of the nonpolar deserts lie within the two trade winds belts.

What kind of pressure zone is at the equator?

low pressure
A major zone of low pressure exists at or near the equator, where the strong sunlight heats the Earth’s surface and air in contact with it, causing it to rise. The climate associated with this zone of low pressure and rising air is tropical, with considerable rainfall in the form of daily thunderstorms.

What are subpolar low pressure cells?

At the polar front, air rises, producing cloudy skies in a band of bad weather sometimes called the Subpolar Low. These large circulation cells produce global pressure bands in latitude zones as shown in the accompanying diagram as HIGH (30° latitude and the poles) and LOW (equator and 50-70° latitude).

Why are there low pressure zones at the equator and high pressure zones to the north of the equator?

This is, in part, because the Earth is not equally heated by the Sun. Areas where the air is warmed often have lower pressure because the warm air rises. Because of Earth’s spin and the Coriolis Effect, winds of a low pressure system swirl counterclockwise north of the equator and clockwise south of the equator.

Why is Itcz called doldrums?

The rising air mass finally subsides in what is known as the horse latitudes, where the air moves downward toward Earth’s surface. Because the air circulates in an upward direction, there is often little surface wind in the ITCZ. And that’s why they call it the doldrums.

What causes low pressure at the equator?

A. Equatorial regions is hotter and the air above expands, becomes less dense and rises. This produces a low pressure belt at this latitude.

What causes the Ferrel cell?

The Ferrel cell occurs at higher latitudes (between 30 degrees and 60 degrees N and 30 degrees and 60 degrees S): This uplift of air causes low pressure at the surface and the unstable weather conditions that are associated with the mid-latitude depressions.

What causes low pressure in the subpolar regions?

Warm air being light, the air at the Equator rises, creating low pressure. In the Subpolar region around latitudes 60° to 65° North and South of the Equator, the rotation of the earth pushes up the bulk of the air towards the Equator, creating a low-pressure belt in this region.

Why is the equator called a sub-polar low pressure belt?

Equator is warm, and warm air rises and that’s how low pressure belt is created near the equator. But over here, it is supposed to be cold. From temperate zone it starts getting colder. So how is it that this region is called as sub-polar low pressure belt.

What is the difference between Equatorial low and polar high?

Near the equator the sea level pressure is low and the area is known as equatorial low. Along 30° N and 30° S are found the high-pressure areas known as the subtropical highs. Further pole wards along 60° N and 60° S, the low-pressure belts are termed as the sub polar lows. Near the poles the pressure is high and it is known as the polar high.

What is the distribution of sea level pressure at the Poles?

World Distribution of Sea Level Pressure. Along 30° N and 30° S are found the high-pressure areas known as the subtropical highs. Further pole wards along 60° N and 60° S, the low-pressure belts are termed as the sub polar lows. Near the poles the pressure is high and it is known as the polar high.

What type of air moves from the equator to subtropical regions?

The air that moves from the equator towards subtropical region, that air is warm. And then you also have to understand, that there is cold air that is a flowing towards the low latitudes from the poles. You see atmospheric circulation redistributes the heat on earth and that means cold and warm air keeps moving from one place to another.