Unit 1 - Weather Hazards & Climate Change - Key Terms (AQA GCSE)
Some key terms and definitions for key concepts in the Weather Hazards / Climate Change section of Unit 1.
Terms in this set (32)
These are events which pose potential risks of damage to property and loss of life.
Global Atmospheric Circulation
The large-scale movements of air (in cells) caused by differences in air pressure.
A large body of air with the same temperature throughout
The pressure exerted by the weight of the atmosphere
Where air is rising
Eye of the storm
The central, calm part of a storm
Rising of the sea due to wind and atmospheric pressure change
Where air is sinking
The effect of the earth's rotation on weather patterns - In the northern hemisphere winds are deflected to the right and in the southern hemisphere they are deflected to the left.
These are areas of very low atmospheric pressure, which form when tropical warm air rise
The scale used to measure tropical storms - based on wind-speed.
Immediate responses to a hazard
What are done once a hazard such as a storm has been forecast and immediately afterwards.
Long-term responses to a hazard.
After a hazard these involve not only restoring the area back to what it was but also looking at planning to try and reduce such effects in future events.
The capacity of a place to cope with a hazard such as a tropical storm.
This refers to a long - term change in global average temperatures.
The use of 'natural-recorders' such as tree rings, ice-cores and ocean sediments which can be used to estimate what climate was like before we had accurate measurements.
These are factors outside of the earth's atmosphere i.e. from space
These are related to things from the ocean, land and atmosphere.
Cold periods when ice covered vast areas of continents
Warmer periods where there are only ice-sheets over Antarctica and Greenland.
Changes in the earth's orbit which changes the distribution of the sun's energy and in turn can affect changes in climate.
Amount of energy given off by the sun
Dark patches on the surface of the sun - where there are more sunspots - more energy is given off.
Period where human activity has been shown to be having a dominant impact on the climate and our environment
A gas which absorbs and emits heat in the atmosphere - e.g. Carbon Dioxide
Where greenhouse gases in the atmosphere stop heat escaping from the Earth into space - the enhanced greenhouse effect can lead to global warming
These are used to deal with the cause of the problem by reducing or preventing greenhouse gases - e.g. alternative energy production, planting trees etc.
These are strategies used to reduce the impacts of climate change e.g. building flood shelters, building houses on stilts, rainwater harvesting etc.
The Intergovernmental Panel on Climate Change (IPCC) is a scientific and intergovernmental body set up with the task of providing the world with an objective, scientific view of climate change and its political and economic impacts.
Carbon Capture and Storage
the capturing of carbon dioxide from power stations etc. and compressing and transporting it to a storage site where it is injected into the ground so it doesn't affect the atmosphere.
Alternative energy production
Using renewable sources of energy such as wind, solar etc. to produce electricity etc. rather than fossil fuels.
Where countries work together to set targets for reducing greenhouse gas emissions - e.g. Kyoto 1997
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