Transcript Tropical storms - Cool Geography

What is the message of the cartoon?
C H A L L E N G E
©Rob Gamesby
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Tropical storms (hurricanes, cyclones, Typhoons) develop as a
result of particular physical conditions.
C H A L L E N G E
©Rob Gamesby
O F
N A T U R A L
H A Z A R D S
http://www.coolgeography.co.uk
Tropical storms (hurricanes, cyclones, Typhoons) develop as a
result of particular physical conditions.
Objectives
1. To be able to describe and
explain where Hurricanes
occur and why
2. To improve memory skills
3. To understand what a
hurricane or tropical storm is
4. To be able to explain how a
hurricane forms
C H A L L E N G E
©Rob Gamesby
Outcomes
1. A completed description
and explanation of
Tropical Storm Location
2. A drawn cross section of
a tropical storm
3. A flow chart explaining
tropical storm formation
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N A T U R A L
H A Z A R D S
http://www.coolgeography.co.uk
Tropical storms (hurricanes, cyclones, Typhoons) develop as a
result of particular physical conditions.
1. Map from memory exercise – Tropical Storm location.
2. You are in groups of 3, you will get to come to the front of
the class and look at the picture for 30 seconds, then go
back to your table to reproduce what you saw
3. 5 goes a team
Once finished;
4. Describe and explain the location of Tropical storms
C H A L L E N G E
©Rob Gamesby
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N A T U R A L
H A Z A R D S
http://www.coolgeography.co.uk
KEY
Sea temperatures go above 27°C
Direction of storm movement
Map of major Tropical Storms
55°N
NORTH
AMERICA
TROPIC OF CANCER
(23.5°N)
9
Average number of storms a year
EUROPE
Typhoon
Haiyan
Hurricane Katrina
13
9
AFRICA
26
2
9
EQUATOR
9
TROPIC OF
CAPRICORN
(23.5°S)
©Rob Gamesby http://www.coolgeography.co.uk
ANTARCTICA
7
9
Describe and explain
the location of tropical
storms
USEFUL SENTENCE
STARTERS The tropical storms are
found...
Most tropical storms
occur in.....
The least tropical storms
occur.....
Many tropical storms
occur at the latitudes
of.....
There are no tropical
storms.....
North America, East
Africa, Southern Asia
etc. have X numbers
of tropical storms.....
The reason for this
location is…
C H A L L E N G E
©Rob Gamesby
O F
N A T U R A L
H A Z A R D S
http://www.coolgeography.co.uk
Formation of tropical storms and hurricanes
1.
Back of your books - Take
notes on this video on how
hurricanes form,
Step 1
Step 2
Step 3
Step 4
2.
3.
4.
Draw a cross section of a
hurricane to show its major
features using slide 8
Write a flow chart explaining
how hurricanes form after
watching slide 9
Simulation of tropical storm
– how does the Saffir
Simpson scale work?
C H A L L E N G E
©Rob Gamesby
Step 5
Step 6
Step 7
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Cross section through a hurricane
©Rob Gamesby http://www.coolgeography.co.uk
Line of cross section
Spiral of fastest
winds around the
eye wall
Anvil of Cumulonimbus clouds
Cooler sinking
air
EYE
Spiral bands of
thunderstorms
Rain bands
About
12KM
Warm upwelling air
Warm Ocean Water (27°C+)
500 to 2000km
C H A L L E N G E
©Rob Gamesby
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N A T U R A L
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How a hurricane FORMS
7. The whole storm
rotates because of the
Earth’s spin
©Rob Gamesby http://www.coolgeography.co.uk
1. The sun sends
incoming solar
radiation to Earth
which warms our
oceans
5. Some cooled air
sinks back down
helping to create
the EYE
Anvil of Cumulonimbus clouds
EYE
Spiral bands of
thunderstorms
6. Air rushes
in from
outside of
the storm
creating
winds
4. This air
cools as it
rises, at 1°C
per 100m, this
causes
condensation
to occur and About
clouds to form 12KM
Rain bands
2. This warms the
oceans to a critical 27°C
3. This causes warm MOIST air to rise through the air in
THERMALS
500 to 2000km
C H A L L E N G E
©Rob Gamesby
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N A T U R A L
H A Z A R D S
http://www.coolgeography.co.uk
The formation of tropical storms and hurricanes
Step 1
Step 2
• The sun sends incoming solar radiation to Earth which warms our oceans
• This warms the oceans to a critical 27°C
• This causes warm MOIST air to rise through the air in THERMALS. This
gives LOW PRESSURE at the centre of the storm
Step 3
• This air cools as it rises, at 1°C per 100m, this causes condensation to
occur, clouds to form and rain to occur
Step 4
Step 5
• Some cooled air sinks back down helping to create the EYE
• Air rushes in from higher pressure areas outside of the storm to lower
pressure areas at the centre of the storm creating winds
Step 6
Step 7
• The whole storm rotates because of the Earth’s spin
C H A L L E N G E
©Rob Gamesby
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N A T U R A L
H A Z A R D S
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Review – in pairs
1. DESCRIBE the Global distribution of tropical
storms (hurricanes, cyclones, typhoons).
2. Outline 2 conditions leading to the
formation of a tropical storm.
3. Draw a quick sketch (30 seconds!) of the
structure and features of a tropical storm.
C H A L L E N G E
©Rob Gamesby
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N A T U R A L
H A Z A R D S
http://www.coolgeography.co.uk