What are windless zones at the equator?

What are windless zones at the equator?

The “doldrums” is a popular nautical term that refers to the belt around the Earth near the equator where sailing ships sometimes get stuck on windless waters. This NASA satellite image shows the Inter-Tropical Convergence Zone, known to sailors around the world as the doldrums.

Why is ITCZ north of equator?

ITCZ stands for Intertropical Convergence Zone. It is a region of clouds, rain, low level convergence and rising air. The ITCZ has a mean position north of the equator because there is much more landmass in the Northern Hemisphere as compared to the Southern Hemisphere.

Why is the doldrums region relatively calm and rainy?

Calm winds, warm temperatures and very convective thunderstorms are used to describe the doldrums. That air then condenses and forms a line of strong convection and energy called the Inter Tropical convergence zone. There is so much energy and moisture here despite its relative calmness.

How does the air at the equator move?

In the tropics, near the equator, warm air rises. When the air cools, it drops back to the ground, flows back towards the Equator, and warm again. The, now, warmed air rises again, and the pattern repeats. This pattern, known as convection, happens on a global scale.

In which months does it rain at the equator?

The rainfall varies locally with the wettest months of the year occurring from November to January and the driest period from June to July (Oldeman, 1978). The daily evapotranspiration rate on land (lower than 4.34 mm) can be slightly more than that on open waters (4.12–4.2 mm).

How does ITCZ influence climate?

Seasonal shifts in the location of the ITCZ drastically affects rainfall in many equatorial nations, resulting in the wet and dry seasons of the tropics rather than the cold and warm seasons of higher latitudes. Longer term changes in the ITCZ can result in severe droughts or flooding in nearby areas.

What region does doldrum lie?

The doldrums lies in the regions of the Pacific and Atlantic oceans that have little winds. There is no wind in that are so sailing by propelling of wind is not possible.

Why are there no winds at the equator?

There are winds at the equator, but they tend to be light, at least at sea. This is for the reasons explained in the other answers. But these answers deal with the large-scale climate pattern, rather than local weather.

Why do winds diverge in the subtropics?

It is common in this region of the subtropics for winds to diverge and either flow toward the poles (known as the prevailing westerlies) or toward the equator (known as the trade winds). These diverging winds are the result of an area of high pressure, which is characterized by calm winds, sunny skies, and little or no precipitation.

Is there wind on the equator in Ecuador?

So, we have wind from about 5 mph to 12 mph today. Seems like there is some wind there. Quito in Ecuador straddles the equator. It’s average elevation is about 2,850m (9,350 ft) above sea level, and it’s well inland.

Why is there little wind in the ITCZ?

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. That is why sailors well know that the area can becalm sailing ships for weeks.

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