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Atmospheric System


The atmospheric system, including the natural greenhouse effect and energy balance (incoming shortwave radiation and outgoing longwave radiation)

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Atmospheric System


The atmospheric system, including the natural greenhouse effect and energy balance (incoming shortwave radiation and outgoing longwave radiation)

 
 

insolation = incoming solar radiation

The atmosphere is an open energy system receiving energy from both the sun and the earth.

Incoming radiation from the sun is short wave, outgoing radiation is long wave.

The sun's energy drives all weather systems and climates. Most is absorbed in tropical latitudes and redistributed to polar latitudes.

 

TASK:

  1. Watch video and make notes

  2. Read pp 426-433 and add to your notes

 
 

natural vs. enhanced greenhouse effect

The greenhouse effect is a natural process that enables life to exist on earth.

However, human activity is increasing the natural process, warming the climate and contributing to global warming and climate change.

This is the enhanced greenhouse effect.

 

TASK: Access the resources above. Draw a labelled diagram explaining the natural greenhouse effect. Write a paragraph explaining how human activity has created the enhanced greenhouse effect.

 

GREENHOUSE GASES

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Earth's Atmospheric energy balance

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Atmospheric Energy Balance

 
 
 
 

PLENARY

Explain the energy flows involved in the greenhouse effect. [5 marks]

 

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Global Energy Balance


Changes in the global energy balance, and the role of feedback loops, resulting from:

solar radiation variations, including global dimming due to volcanic eruptions

terrestrial albedo changes and feedback loops

methane gas release and feedback loops

Global Energy Balance


Changes in the global energy balance, and the role of feedback loops, resulting from:

solar radiation variations, including global dimming due to volcanic eruptions

terrestrial albedo changes and feedback loops

methane gas release and feedback loops

task

  1. Read pp 146 - 149 Patterns and Change Book
  2. Make detailed notes with diagrams under the headings provided
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Enhanced Greenhouse Effect


The enhanced greenhouse effect and international variations in greenhouse gas sources and emissions, in relation to economic development, globalization and trade.

Enhanced Greenhouse Effect


The enhanced greenhouse effect and international variations in greenhouse gas sources and emissions, in relation to economic development, globalization and trade.

 
 

natural vs. human causes of climate change

  1. List the different causes of climate change in two columns
 
 

greenhouse gases

 

history of atmospheric CO2

 
 

environmental consequences of climate change

task

  1. Read pp 152-155 Patterns and Change Book
  2. Annotate an A3 world map with effects of global climate change

  3. Access the resources below and add to your world mp

 

 
 

other resources - cLimate change impacts

 
 
 
 

bangladesh

 

aral sea

lake chad

 
 

podcast bbc radio 4

 
 

EXAM PRACTICE

Explain two possible environmental consequences of global climate change. [3+3]
 

 
 

The consequences may be at any scale and there are many possible answers. 

In each case, award [1 mark] for identifying a valid consequence with a further [2 marks] for two distinct points in the explanation, one of which could be exemplification.

Possible consequences include:

  • rising sea levels [1 mark] due to thermal expansion [1 mark] floods lowlands [1 mark]
  • melting ice / Earth’s albedo reduced/increased intake of solar radiation / warms climate further
  • increased temperature of oceans / greater incidence of tropical storms / devastation caused by hurricane Sandy in Haiti, Cuba
  • melting ice releasing freshwater into North Atlantic / shuts down ocean / may lead to falling temperatures in Europe.

Other possibilities: extinctions, moving biomes, bleaching of coral reefs, desertification, etc.

 
 

further reading

Core Book // pp 54-56