How Are Typhoons Made?

Understanding Typhoons How are Typhoons formed?

What is “Typhoon”?A typhoon is a mature tropical cyclone that develops in the western part of the North Pacific Ocean between 180° and 100°E.

A tropical storm in the region of the Indian or western Pacific oceans.

Structure of A Typhoon

“EYE”The "eye" is roughly circular and is found at the centre of a typhoon. Its size varies and can range from below 10 km to

over 200 km across, but most are about 30 to 60 km in diameter.

Winds are comparatively light and the weather is fair inside the eye. There is little or no rain and one can sometimes see the blue sky or stars. The eye is the region of lowest surface pressure (Figure 2 & 3) and

highest temperatures. Compared with its surroundings, the eye may be up to 2°C warmer at

the surface and 10°C or more at an altitude of 12 km.

“EYE WALL”The eye is surrounded by the "eye wall", a roughly circular ring of thick clouds. Inside the eye, the air

is sinking.

On the other hand, the eye wall has very deep convection (i.e., ascent) and is the area of highest

surface winds and heavy rain in the typhoon. Figure 4 shows how the winds at Lau Fau Shan changed during the passage of Typhoon Dujuan in 2003.

They increased significantly as the eye wall of Dujuan approached and decreased rapidly as the

storm moved away.

“Rain Bands”Convection outside the eye is organized into long, narrow rain bands which are oriented roughly in the same direction as the surface wind.

Because these bands appear to spiral into the centre of a tropical cyclone, they are sometimes called "spiral rain bands".

Types of Rain Bands:1.Inner (Rain) Bands2.Outer (Feeder) Bands

How are Typhoons Formed?Video ClipExplanation

Typhoon Formed By:

Where Do Typhoon Came From?

Hurricanes start over the ocean. They form over warm water near the equator. The equator is an imaginary line that goes around the middle of

the planet.

How is typhoon formed?

In tropical oceans, the water in the oceans' surface layer heated by the direct solar radiation. As a result, the air

above the tropical oceans is characterized by high temperature and humidity, resulting in air inflation that easily leads to low density per unit volume of air. Weak wind near the equator causes the lighter air to soar and

incur convection that further attracts inflow of surrounding cooler air. The intake air then warms up and

soars again, creating a positive feedback cycle that eventually forms an air column with high temperature,

light weight and low density. This is how the tropical depression forms.

Can Typhoons Be Predicted?

Meteorologists watch for hurricanes at sea during summer and autumn. When a hurricane forms out in the ocean they

watch it very carefully. They use radar, weather satellites, and instruments in the sea. They try to figure out which way

the hurricane is traveling. Sometimes special airplanes fly into the hurricane to make measurements.

This was taken by: Scott Kelly during his “Exploration in Space” and back to the Earth (2016)…

TYPHOON

Effects Of A Typhoon

Buildings and Infrastructure

Typhoon winds can affect buildings and other structures in two ways: through direct force and through projectiles.

Direct force is when a wind gust slams directly into a building or structure and causes physical damage, such as

when wind blows the roof off a home. Wind can also inflict damage by picking up and launching debris and other items, such as tree branches and building materials, into buildings

and other structures.

Trees and Other Vegetation

Typhoons can also affect the natural environment, and cause harm to trees and

other vegetation, including crops that communities

may rely on for sustenance or trade, or both. Strong winds can snap branches; detach and injure leaves, flowers, fruits and seeds; and

uproot trees and plants.

Life

Both human and animal life can be impacted, and ultimately taken, by the destructive forces of typhoons.

While this can occur directly, such as if an individual is struck by debris or

is caught in a building collapse, perhaps the more silent killer is the

lack of available resources and infrastructure that results.

Truth Behind The Typhoon Yolanda

Storm SurgeEffects

Storm SurgeStorm surge is an abnormal rise of water generated by a storm, over

and above the predicted astronomical tides.

Factors Impacting SurgeStorm surge is produced by water being pushed toward the shore by the force of the winds moving cyclonically around the storm. The impact on surge of the low pressure associated with intense storms is minimal in comparison to the water

being forced toward the shore by the wind.

Typhoon Yolanda

FOR LISTENING

AND WATCHING!

REPORTERS:ALYSSA LITACOLEEN ORDINADOJELLY FAJARDO