Types of Rainfall and Formation of Typhoon

Types of Rainfall and Formation of Typhoon

by Sir Fauzan

Poll

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​Types of Rainfall

​In Brunei Darussalam

​There are two types of rainfall in Brunei:

​1. Convectional Rainfall

​2. Relief or Orographic Rainfall

​How does convectional rainfall form?

​1) Hot sun heats any water on the ground.

2) Water from the ground is evaporated.

3) Water vapor rises, cools, and condenses at the dew point.

4) Clouds form and rain fall.

Multiple Choice

In convectional rainfall, what happened in process 6 shown in the picture?

• A collection of these minute water droplets is known as a cloud

• As the air rises, the water vapour in the air cools and condenses into water droplets

• The sun heats the earth

• These minute water droplets join together, become heavy and fall as rain

Multiple Choice

In convectional rainfall, what happened in process 1 shown in the picture?

• A collection of these minute water droplets is known as a cloud

• As the air rises, the water vapour in the air cools and condenses into water droplets

• The sun heats the earth

• These minute water droplets join together, become heavy and fall as rain

Multiple Choice

In convectional rainfall, what happened in process 5 shown in the picture?

• A collection of these minute water droplets is known as a cloud

• As the air rises, the water vapour in the air cools and condenses into water droplets

• The sun heats the earth

• These minute water droplets join together, become heavy and fall as rain

​How does relief rainfall form?

​1) Evaporation causes warm, moist air over the sea.

2) As the air meets a hill, it is forced to rise.

3) As it rises, the air cools and condenses at the dew point.

4) Clouds form and rainfalls.

5) The air sinks over the other side of the hill. No rain falls here in the rainshadow

Multiple Choice

In relief rainfall, what happened in process 6 shown in the picture?

• Rainshadow

•  

   The air cools and condenses

• Warm moist air

•  

   Air descends and warms

Multiple Choice

In relief rainfall, what happened in process 2 shown in the picture?

• Air cools and condenses

•  

  Warm moist air

• Air is forces to rise

•  

   Air descends and warms

Multiple Choice

In relief rainfall, what happened in process 3 shown in the picture?

• Air cools and condenses

•  

  Warm moist air

• Air is forces to rise

•  

   Air descends and warms

Tropical Storm​

Typhoon​

​Tropical Storm

​There are three types of tropical storms:

​

​1) Atlantic ocean – Hurricanes

2) Indian ocean – Cyclones

3) Pacific ocean - Typhoons

​How does a typhoon form?

• ​As air rises over warm ___________ ocean, huge quantity of water evaporated quickly.

• ​This evaporated air cools as it rises and condenses to form a towering thunderstorm cloud.

​​How does a typhoon form?

• ​As the cloud condenses and releases heat, which serves to power the tropical storm and draws up more and more water from the ocean.

• ​Several smaller thunderstorms may join together to form one giant spinning storm (due to the rotation of the Earth).

​​How does a typhoon form?

• ​The storm now develops an eye at its center where air descends rapidly. The outer edge of the eye is the eyewall where the most intense weather conditions (strong winds and heavy rain) are felt.

• ​When the surface winds reach an average of 125kph (75mph) the storm officially becomes a typhoon

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​How climate change will affect tropic storms?

​1) Frequency

​Temperature over the sea rises........ increase frequency of tropical storms

​

​2) Intensity

​Temperature over the sea rises will give more energy fuel for evaporation ......................... storms become more intense and powerful

​

​3) Distribution

​

​Sea surface temperatures in the Tropics have increased by about 0.5 degrees celsius............................tropical storms affect areas outside the current hazard zone

Poll

Rate your understanding for this topic:

Typhoon: You understand

Storm Cloud: I understand but I need to read up more

Cloud: I don't understand at all