Weather Hazards

  • Created by: kete123
  • Created on: 28-10-17 14:46
what is global atmospheric circulation?
The way in which energy provided from the sun is transferred around the world, in cells
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what is latitude?
A horizontal line from west to east on a map showing where places lie relative to the equator and poles
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what are convection cells?
Areas of high and low air pressure which are linked by the flow of warmer and cooler air
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what is air pressure?
The force that the air exerts on the earths surface
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what is air pressure measured in?
hectoPascals (hPa)
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why is the equator hotter than the poles?
Earth is on a tilt meaning the suns rays have to travel a shorter distance to reach the equator so the heat at the equator is more concentrated
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what are the three cells on each quarter of the earth?
Hadley cell, Ferrel cell, Polar cell
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Polar front?
Boundary between polar and ferrel cell, the uk is at the polar front
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ITCZ?
Inter Tropical Convergence Zone, low pressure area where air rises and triggers torrential rain
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high pressure?
air that is sinking , cold air sinks at high pressure zones
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low pressure?
air that is rising, warm air rises at high pressure zones
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Hadley cell
from equator to 30-40 degrees N/S, air circulates towards poles
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Ferrel cell
between 30-40 degrees to 60-70 degrees N/S , air circulates towards equator
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polar cell
between 60-70 degrees to poles N/S, air circulates towards poles
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what is a jet stream?
Jet streams are fast flowing, narrow, meandering air currents in the atmosphere
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examples of jet streams
gulf stream
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what is a tropical storm?
a general name for an intense low pressure wind ad water system which is formed over tropical oceans
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where are tropical storms formed?
5-15 degrees north or south of the equator, between the tropics
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what temperature does the sea need to be for tropical storms to form?
26.5 degrees
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wind speed for Tropical storm to form?
at least 74mph
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surface required for tropical storm to form?
warm, deep ocean
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air pressure required for tropical storm to form?
low air pressure
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what factors make a tropical storm spin?
Coriolis effect, if hit by strong winds
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what is the coriolis effect?
the effect of the earth's spin on the atmosphere
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what happens when a tropical storm hits land?
loses energy source and stops over time
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what is a hurricane?
a tropical storm in the atlantic or northeast pacific oceans
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what is a typhoon?
a tropical storm formed in the northwest pacific ocean
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what is a cyclone?
a tropical storm in the South Pacific and Indian Ocean
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what is the cycle of a hurricane?
tropical disturbance, tropical depression,tropical storm, hurricane
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what are the main features of a hurricane?
the eye, rain bands, the eye wall, rising warm air, sinking cold air
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how will increase in temperature affect effects of a tropical storm?
sea levels rise due to thermal expansion meaning more extreme storm surges. Also more moisture in air meaning heavier rainfall and more severe flooding
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how does climate change affect distribution of tropical storms?
doesn't affect it much, storms may travel further due to warmer sea temperatures
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how does climate change affect the frequency of tropical storms?
no effect
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how does climate change affect the intensity of tropical storms?
warmer climate will increase the intensity of tropical storms die to higher sea level and more rainfall
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what are the 4 ways of reducing the effects of a tropical storm?
monitoring, planning, protecting and predicting
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what is climate?
an area's long-term average weather conditions, this is measured in different ways, e.g. average temp, precipitation,humidity,sunshine hours.
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what is weather?
the day-to-day condition of the atmosphere e.g. sunny windy,rainy
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what is temperate climate?
a climate in which the temperatures are generally moderate so its never too hot or too cold
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what type of climate does the UK have?
Temperate climate
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what are the different types of climate?
polar, temperate, arid, tropical, Mediterranean, mountains
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Other cards in this set

Card 2

Front

what is latitude?

Back

A horizontal line from west to east on a map showing where places lie relative to the equator and poles

Card 3

Front

what are convection cells?

Back

Preview of the front of card 3

Card 4

Front

what is air pressure?

Back

Preview of the front of card 4

Card 5

Front

what is air pressure measured in?

Back

Preview of the front of card 5
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